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2015-07-30KVM: s390: Fix hang VCPU hang/loop regressionChristian Borntraeger1-2/+2
commit 785dbef407d8 ("KVM: s390: optimize round trip time in request handling") introduced a regression. This regression was seen with CPU hotplug in the guest and switching between 1 or 2 CPUs. This will set/reset the IBS control via synced request. Whenever we make a synced request, we first set the vcpu->requests bit and then block the vcpu. The handler, on the other hand, unblocks itself, processes vcpu->requests (by clearing them) and unblocks itself once again. Now, if the requester sleeps between setting of vcpu->requests and blocking, the handler will clear the vcpu->requests bit and try to unblock itself (although no bit is set). When the requester wakes up, it blocks the VCPU and we have a blocked VCPU without requests. Solution is to always unset the block bit. Signed-off-by: Christian Borntraeger <[email protected]> Reviewed-by: David Hildenbrand <[email protected]> Fixes: 785dbef407d8 ("KVM: s390: optimize round trip time in request handling")
2015-07-30powerpc/eeh-powernv: Fix unbalanced IRQ warningAlistair Popple1-1/+1
pnv_eeh_next_error() re-enables the eeh opal event interrupt but it gets called from a loop if there are more outstanding events to process, resulting in a warning due to enabling an already enabled interrupt. Instead the interrupt should only be re-enabled once the last outstanding event has been processed. Tested-by: Daniel Axtens <[email protected]> Reported-by: Daniel Axtens <[email protected]> Signed-off-by: Alistair Popple <[email protected]> Acked-by: Gavin Shan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2015-07-29ebpf, x86: fix general protection fault when tail call is invokedDaniel Borkmann1-4/+4
With eBPF JIT compiler enabled on x86_64, I was able to reliably trigger the following general protection fault out of an eBPF program with a simple tail call, f.e. tracex5 (or a stripped down version of it): [ 927.097918] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC [...] [ 927.100870] task: ffff8801f228b780 ti: ffff880016a64000 task.ti: ffff880016a64000 [ 927.102096] RIP: 0010:[<ffffffffa002440d>] [<ffffffffa002440d>] 0xffffffffa002440d [ 927.103390] RSP: 0018:ffff880016a67a68 EFLAGS: 00010006 [ 927.104683] RAX: 5a5a5a5a5a5a5a5a RBX: 0000000000000000 RCX: 0000000000000001 [ 927.105921] RDX: 0000000000000000 RSI: ffff88014e438000 RDI: ffff880016a67e00 [ 927.107137] RBP: ffff880016a67c90 R08: 0000000000000000 R09: 0000000000000001 [ 927.108351] R10: 0000000000000000 R11: 0000000000000000 R12: ffff880016a67e00 [ 927.109567] R13: 0000000000000000 R14: ffff88026500e460 R15: ffff880220a81520 [ 927.110787] FS: 00007fe7d5c1f740(0000) GS:ffff880265000000(0000) knlGS:0000000000000000 [ 927.112021] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 927.113255] CR2: 0000003e7bbb91a0 CR3: 000000006e04b000 CR4: 00000000001407e0 [ 927.114500] Stack: [ 927.115737] ffffc90008cdb000 ffff880016a67e00 ffff88026500e460 ffff880220a81520 [ 927.117005] 0000000100000000 000000000000001b ffff880016a67aa8 ffffffff8106c548 [ 927.118276] 00007ffcdaf22e58 0000000000000000 0000000000000000 ffff880016a67ff0 [ 927.119543] Call Trace: [ 927.120797] [<ffffffff8106c548>] ? lookup_address+0x28/0x30 [ 927.122058] [<ffffffff8113d176>] ? __module_text_address+0x16/0x70 [ 927.123314] [<ffffffff8117bf0e>] ? is_ftrace_trampoline+0x3e/0x70 [ 927.124562] [<ffffffff810c1a0f>] ? __kernel_text_address+0x5f/0x80 [ 927.125806] [<ffffffff8102086f>] ? print_context_stack+0x7f/0xf0 [ 927.127033] [<ffffffff810f7852>] ? __lock_acquire+0x572/0x2050 [ 927.128254] [<ffffffff810f7852>] ? __lock_acquire+0x572/0x2050 [ 927.129461] [<ffffffff8119edfa>] ? trace_call_bpf+0x3a/0x140 [ 927.130654] [<ffffffff8119ee4a>] trace_call_bpf+0x8a/0x140 [ 927.131837] [<ffffffff8119edfa>] ? trace_call_bpf+0x3a/0x140 [ 927.133015] [<ffffffff8119f008>] kprobe_perf_func+0x28/0x220 [ 927.134195] [<ffffffff811a1668>] kprobe_dispatcher+0x38/0x60 [ 927.135367] [<ffffffff81174b91>] ? seccomp_phase1+0x1/0x230 [ 927.136523] [<ffffffff81061400>] kprobe_ftrace_handler+0xf0/0x150 [ 927.137666] [<ffffffff81174b95>] ? seccomp_phase1+0x5/0x230 [ 927.138802] [<ffffffff8117950c>] ftrace_ops_recurs_func+0x5c/0xb0 [ 927.139934] [<ffffffffa022b0d5>] 0xffffffffa022b0d5 [ 927.141066] [<ffffffff81174b91>] ? seccomp_phase1+0x1/0x230 [ 927.142199] [<ffffffff81174b95>] seccomp_phase1+0x5/0x230 [ 927.143323] [<ffffffff8102c0a4>] syscall_trace_enter_phase1+0xc4/0x150 [ 927.144450] [<ffffffff81174b95>] ? seccomp_phase1+0x5/0x230 [ 927.145572] [<ffffffff8102c0a4>] ? syscall_trace_enter_phase1+0xc4/0x150 [ 927.146666] [<ffffffff817f9a9f>] tracesys+0xd/0x44 [ 927.147723] Code: 48 8b 46 10 48 39 d0 76 2c 8b 85 fc fd ff ff 83 f8 20 77 21 83 c0 01 89 85 fc fd ff ff 48 8d 44 d6 80 48 8b 00 48 83 f8 00 74 0a <48> 8b 40 20 48 83 c0 33 ff e0 48 89 d8 48 8b 9d d8 fd ff ff 4c [ 927.150046] RIP [<ffffffffa002440d>] 0xffffffffa002440d The code section with the instructions that traps points into the eBPF JIT image of the root program (the one invoking the tail call instruction). Using bpf_jit_disasm -o on the eBPF root program image: [...] 4e: mov -0x204(%rbp),%eax 8b 85 fc fd ff ff 54: cmp $0x20,%eax <--- if (tail_call_cnt > MAX_TAIL_CALL_CNT) 83 f8 20 57: ja 0x000000000000007a 77 21 59: add $0x1,%eax <--- tail_call_cnt++ 83 c0 01 5c: mov %eax,-0x204(%rbp) 89 85 fc fd ff ff 62: lea -0x80(%rsi,%rdx,8),%rax <--- prog = array->prog[index] 48 8d 44 d6 80 67: mov (%rax),%rax 48 8b 00 6a: cmp $0x0,%rax <--- check for NULL 48 83 f8 00 6e: je 0x000000000000007a 74 0a 70: mov 0x20(%rax),%rax <--- GPF triggered here! fetch of bpf_func 48 8b 40 20 [ matches <48> 8b 40 20 ... from above ] 74: add $0x33,%rax <--- prologue skip of new prog 48 83 c0 33 78: jmpq *%rax <--- jump to new prog insns ff e0 [...] The problem is that rax has 5a5a5a5a5a5a5a5a, which suggests a tail call jump to map slot 0 is pointing to a poisoned page. The issue is the following: lea instruction has a wrong offset, i.e. it should be ... lea 0x80(%rsi,%rdx,8),%rax ... but it actually seems to be ... lea -0x80(%rsi,%rdx,8),%rax ... where 0x80 is offsetof(struct bpf_array, prog), thus the offset needs to be positive instead of negative. Disassembling the interpreter, we btw similarly do: [...] c88: lea 0x80(%rax,%rdx,8),%rax <--- prog = array->prog[index] 48 8d 84 d0 80 00 00 00 c90: add $0x1,%r13d 41 83 c5 01 c94: mov (%rax),%rax 48 8b 00 [...] Now the other interesting fact is that this panic triggers only when things like CONFIG_LOCKDEP are being used. In that case offsetof(struct bpf_array, prog) starts at offset 0x80 and in non-CONFIG_LOCKDEP case at offset 0x50. Reason is that the work_struct inside struct bpf_map grows by 48 bytes in my case due to the lockdep_map member (which also has CONFIG_LOCK_STAT enabled members). Changing the emitter to always use the 4 byte displacement in the lea instruction fixes the panic on my side. It increases the tail call instruction emission by 3 more byte, but it should cover us from various combinations (and perhaps other future increases on related structures). After patch, disassembly: [...] 9e: lea 0x80(%rsi,%rdx,8),%rax <--- CONFIG_LOCKDEP/CONFIG_LOCK_STAT 48 8d 84 d6 80 00 00 00 a6: mov (%rax),%rax 48 8b 00 [...] [...] 9e: lea 0x50(%rsi,%rdx,8),%rax <--- No CONFIG_LOCKDEP 48 8d 84 d6 50 00 00 00 a6: mov (%rax),%rax 48 8b 00 [...] Fixes: b52f00e6a715 ("x86: bpf_jit: implement bpf_tail_call() helper") Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Alexei Starovoitov <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2015-07-29Merge branch 'for-linus' of ↵Linus Torvalds2-7/+9
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 fixes from Martin Schwidefsky: "Two bug fixes: - fix a crash on pre-z10 hardware due to cache-info - fix an issue with classic BPF programs in the eBPF JIT" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/cachinfo: add missing facility check to init_cache_level() s390/bpf: clear correct BPF accumulator register
2015-07-28Merge tag 'arm64-fixes' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fix from Catalin Marinas: "Fix buffer overflow when UTF-16 UEFI vendor string is copied from the system table into a char array with a size of 100 bytes" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64/efi: map the entire UEFI vendor string before reading it
2015-07-28Merge tag 'imx-fixes-4.2-2' of ↵Olof Johansson1-4/+4
git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux into fixes The i.MX fixes for 4.2, 2nd round: - Add the required second clock for i.MX35 FlexCAN in device tree, so that the device can be probed by kernel successfully. * tag 'imx-fixes-4.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/shawnguo/linux: ARM: dts: i.MX35: Fix can support. Signed-off-by: Olof Johansson <[email protected]>
2015-07-28s390/cachinfo: add missing facility check to init_cache_level()Heiko Carstens1-0/+2
Stephen Powell reported the following crash on a z890 machine: Kernel BUG at 00000000001219d0 [verbose debug info unavailable] illegal operation: 0001 ilc:3 [#1] SMP Krnl PSW : 0704e00180000000 00000000001219d0 (init_cache_level+0x38/0xe0) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 EA:3 Krnl Code: 00000000001219c2: a7840056 brc 8,121a6e 00000000001219c6: a7190000 lghi %r1,0 #00000000001219ca: eb101000004c ecag %r1,%r0,0(%r1) >00000000001219d0: a7390000 lghi %r3,0 00000000001219d4: e310f0a00024 stg %r1,160(%r15) 00000000001219da: a7080000 lhi %r0,0 00000000001219de: a7b9f000 lghi %r11,-4096 00000000001219e2: c0a0002899d9 larl %r10,634d94 Call Trace: [<0000000000478ee2>] detect_cache_attributes+0x2a/0x2b8 [<000000000097c9b0>] cacheinfo_sysfs_init+0x60/0xc8 [<00000000001001c0>] do_one_initcall+0x98/0x1c8 [<000000000094fdc2>] kernel_init_freeable+0x212/0x2d8 [<000000000062352e>] kernel_init+0x26/0x118 [<000000000062fd2e>] kernel_thread_starter+0x6/0xc The illegal operation was executed because of a missing facility check, which should have made sure that the ECAG execution would only be executed on machines which have the general-instructions-extension facility installed. Reported-and-tested-by: Stephen Powell <[email protected]> Cc: [email protected] # v4.0+ Signed-off-by: Heiko Carstens <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2015-07-27arm64/efi: map the entire UEFI vendor string before reading itArd Biesheuvel1-2/+2
At boot, the UTF-16 UEFI vendor string is copied from the system table into a char array with a size of 100 bytes. However, this size of 100 bytes is also used for memremapping() the source, which may not be sufficient if the vendor string exceeds 50 UTF-16 characters, and the placement of the vendor string inside a 4 KB page happens to leave the end unmapped. So use the correct '100 * sizeof(efi_char16_t)' for the size of the mapping. Signed-off-by: Ard Biesheuvel <[email protected]> Fixes: f84d02755f5a ("arm64: add EFI runtime services") Cc: <[email protected]> # 3.16+ Signed-off-by: Catalin Marinas <[email protected]>
2015-07-27avr32: handle NULL as a valid clock objectAndy Shevchenko1-1/+19
Since NULL is used as valid clock object on optional clocks we have to handle this case in avr32 implementation as well. Fixes: e1824dfe0d8e (net: macb: Adjust tx_clk when link speed changes) Signed-off-by: Andy Shevchenko <[email protected]> Acked-by: Hans-Christian Egtvedt <[email protected]>
2015-07-27s390/bpf: clear correct BPF accumulator registerMichael Holzheu1-7/+7
Currently we assumed the following BPF to eBPF register mapping: - BPF_REG_A -> BPF_REG_7 - BPF_REG_X -> BPF_REG_8 Unfortunately this mapping is wrong. The correct mapping is: - BPF_REG_A -> BPF_REG_0 - BPF_REG_X -> BPF_REG_7 So clear the correct registers and use the BPF_REG_A and BPF_REG_X macros instead of BPF_REG_0/7. Fixes: 054623105728 ("s390/bpf: Add s390x eBPF JIT compiler backend") Cc: [email protected] # 4.0+ Signed-off-by: Michael Holzheu <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
2015-07-26ARM: nomadik: disable UART0 on Nomadik boardsLinus Walleij3-0/+6
The UART0 is not used on these boards, yet active and blocking other use. Fix this by disabling UART0 and setting port aliases to maintain port enumeration to userspace. Signed-off-by: Linus Walleij <[email protected]> Signed-off-by: Olof Johansson <[email protected]>
2015-07-26Merge tag 'for-v4.2-rc/omap-fixes-a' of ↵Olof Johansson2-11/+18
git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into fixes Merge "ARM: OMAP2+: hwmod fixes for v4.2-rc" from Paul Walmsley: ARM: OMAP2+: hwmod fixes for v4.2-rc Two fixes against v4.2-rc1. The first, for DRA7xx platforms, corrects some incorrect GPMC hardware description data. The second one will ensure that the hwmod code will wait for any module with CPU-accessible registers to become ready before attempting to access it. Basic build, boot, and PM test logs are available here: http://www.pwsan.com/omap/testlogs/omap-hwmod-a-for-v4.2-rc/20150723065408/ Note that I do not have a DRA7xx or AM43xx board, and therefore cannot test on those platforms. * tag 'for-v4.2-rc/omap-fixes-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending: ARM: OMAP2+: hwmod: Fix _wait_target_ready() for hwmods without sysc ARM: DRA7: hwmod: fix gpmc hwmod Signed-off-by: Olof Johansson <[email protected]>
2015-07-26Merge branch 'perf-urgent-for-linus' of ↵Linus Torvalds1-0/+8
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull perf fix from Thomas Gleixner: "A single fix for the intel cqm perf facility to prevent IPIs from interrupt context" * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf/x86/intel/cqm: Return cached counter value from IRQ context
2015-07-26Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds6-44/+32
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "This update contains: - the manual revert of the SYSCALL32 changes which caused a regression - a fix for the MPX vma handling - three fixes for the ioremap 'is ram' checks. - PAT warning fixes - a trivial fix for the size calculation of TLB tracepoints - handle old EFI structures gracefully This also contains a PAT fix from Jan plus a revert thereof. Toshi explained why the code is correct" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mm/pat: Revert 'Adjust default caching mode translation tables' x86/asm/entry/32: Revert 'Do not use R9 in SYSCALL32' commit x86/mm: Fix newly introduced printk format warnings mm: Fix bugs in region_is_ram() x86/mm: Remove region_is_ram() call from ioremap x86/mm: Move warning from __ioremap_check_ram() to the call site x86/mm/pat, drivers/media/ivtv: Move the PAT warning and replace WARN() with pr_warn() x86/mm/pat, drivers/infiniband/ipath: Replace WARN() with pr_warn() x86/mm/pat: Adjust default caching mode translation tables x86/fpu: Disable dependent CPU features on "noxsave" x86/mpx: Do not set ->vm_ops on MPX VMAs x86/mm: Add parenthesis for TLB tracepoint size calculation efi: Handle memory error structures produced based on old versions of standard
2015-07-26x86/mm/pat: Revert 'Adjust default caching mode translation tables'Thomas Gleixner1-3/+3
Toshi explains: "No, the default values need to be set to the fallback types, i.e. minimal supported mode. For WC and WT, UC is the fallback type. When PAT is disabled, pat_init() does update the tables below to enable WT per the default BIOS setup. However, when PAT is enabled, but CPU has PAT -errata, WT falls back to UC per the default values." Revert: ca1fec58bc6a 'x86/mm/pat: Adjust default caching mode translation tables' Requested-by: Toshi Kani <[email protected]> Cc: Jan Beulich <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2015-07-26perf/x86/intel/cqm: Return cached counter value from IRQ contextMatt Fleming1-0/+8
Peter reported the following potential crash which I was able to reproduce with his test program, [ 148.765788] ------------[ cut here ]------------ [ 148.765796] WARNING: CPU: 34 PID: 2840 at kernel/smp.c:417 smp_call_function_many+0xb6/0x260() [ 148.765797] Modules linked in: [ 148.765800] CPU: 34 PID: 2840 Comm: perf Not tainted 4.2.0-rc1+ #4 [ 148.765803] ffffffff81cdc398 ffff88085f105950 ffffffff818bdfd5 0000000000000007 [ 148.765805] 0000000000000000 ffff88085f105990 ffffffff810e413a 0000000000000000 [ 148.765807] ffffffff82301080 0000000000000022 ffffffff8107f640 ffffffff8107f640 [ 148.765809] Call Trace: [ 148.765810] <NMI> [<ffffffff818bdfd5>] dump_stack+0x45/0x57 [ 148.765818] [<ffffffff810e413a>] warn_slowpath_common+0x8a/0xc0 [ 148.765822] [<ffffffff8107f640>] ? intel_cqm_stable+0x60/0x60 [ 148.765824] [<ffffffff8107f640>] ? intel_cqm_stable+0x60/0x60 [ 148.765825] [<ffffffff810e422a>] warn_slowpath_null+0x1a/0x20 [ 148.765827] [<ffffffff811613f6>] smp_call_function_many+0xb6/0x260 [ 148.765829] [<ffffffff8107f640>] ? intel_cqm_stable+0x60/0x60 [ 148.765831] [<ffffffff81161748>] on_each_cpu_mask+0x28/0x60 [ 148.765832] [<ffffffff8107f6ef>] intel_cqm_event_count+0x7f/0xe0 [ 148.765836] [<ffffffff811cdd35>] perf_output_read+0x2a5/0x400 [ 148.765839] [<ffffffff811d2e5a>] perf_output_sample+0x31a/0x590 [ 148.765840] [<ffffffff811d333d>] ? perf_prepare_sample+0x26d/0x380 [ 148.765841] [<ffffffff811d3497>] perf_event_output+0x47/0x60 [ 148.765843] [<ffffffff811d36c5>] __perf_event_overflow+0x215/0x240 [ 148.765844] [<ffffffff811d4124>] perf_event_overflow+0x14/0x20 [ 148.765847] [<ffffffff8107e7f4>] intel_pmu_handle_irq+0x1d4/0x440 [ 148.765849] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765853] [<ffffffff81219bad>] ? vunmap_page_range+0x19d/0x2f0 [ 148.765854] [<ffffffff81219d11>] ? unmap_kernel_range_noflush+0x11/0x20 [ 148.765859] [<ffffffff814ce6fe>] ? ghes_copy_tofrom_phys+0x11e/0x2a0 [ 148.765863] [<ffffffff8109e5db>] ? native_apic_msr_write+0x2b/0x30 [ 148.765865] [<ffffffff8109e44d>] ? x2apic_send_IPI_self+0x1d/0x20 [ 148.765869] [<ffffffff81065135>] ? arch_irq_work_raise+0x35/0x40 [ 148.765872] [<ffffffff811c8d86>] ? irq_work_queue+0x66/0x80 [ 148.765875] [<ffffffff81075306>] perf_event_nmi_handler+0x26/0x40 [ 148.765877] [<ffffffff81063ed9>] nmi_handle+0x79/0x100 [ 148.765879] [<ffffffff81064422>] default_do_nmi+0x42/0x100 [ 148.765880] [<ffffffff81064563>] do_nmi+0x83/0xb0 [ 148.765884] [<ffffffff818c7c0f>] end_repeat_nmi+0x1e/0x2e [ 148.765886] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765888] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765890] [<ffffffff811d07a6>] ? __perf_event_task_sched_in+0x36/0xa0 [ 148.765891] <<EOE>> [<ffffffff8110ab66>] finish_task_switch+0x156/0x210 [ 148.765898] [<ffffffff818c1671>] __schedule+0x341/0x920 [ 148.765899] [<ffffffff818c1c87>] schedule+0x37/0x80 [ 148.765903] [<ffffffff810ae1af>] ? do_page_fault+0x2f/0x80 [ 148.765905] [<ffffffff818c1f4a>] schedule_user+0x1a/0x50 [ 148.765907] [<ffffffff818c666c>] retint_careful+0x14/0x32 [ 148.765908] ---[ end trace e33ff2be78e14901 ]--- The CQM task events are not safe to be called from within interrupt context because they require performing an IPI to read the counter value on all sockets. And performing IPIs from within IRQ context is a "no-no". Make do with the last read counter value currently event in event->count when we're invoked in this context. Reported-by: Peter Zijlstra <[email protected]> Signed-off-by: Matt Fleming <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vikas Shivappa <[email protected]> Cc: Kanaka Juvva <[email protected]> Cc: Will Auld <[email protected]> Cc: <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2015-07-25Merge tag 'tty-4.2-rc4' of ↵Linus Torvalds1-0/+5
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial driver fixes from Greg KH: "Here are a number of small serial and tty fixes for reported issues. All have been in linux-next successfully" * tag 'tty-4.2-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: tty: vt: Fix !TASK_RUNNING diagnostic warning from paste_selection() serial: core: Fix crashes while echoing when closing m32r: Add ioreadXX/iowriteXX big-endian mmio accessors Revert "serial: imx: initialized DMA w/o HW flow enabled" sc16is7xx: fix FIFO address of secondary UART sc16is7xx: fix Kconfig dependencies serial: etraxfs-uart: Fix release etraxfs_uart_ports tty/vt: Fix the memory leak in visual_init serial: amba-pl011: Fix devm_ioremap_resource return value check n_tty: signal and flush atomically
2015-07-25ARM: dts: i.MX35: Fix can support.Denis Carikli1-4/+4
Since commit 3d42a379b6fa5b46058e3302b1802b29f64865bb ("can: flexcan: add 2nd clock to support imx53 and newer") the can driver requires a dt nodes to have a second clock. Add them to imx35 to fix probing the flex can driver on the respective platforms. Signed-off-by: Denis Carikli <[email protected]> Cc: <[email protected]> Signed-off-by: Shawn Guo <[email protected]>
2015-07-24Merge tag 'mmc-4.2-rc3' of git://git.linaro.org/people/ulf.hansson/mmcLinus Torvalds33-68/+75
Pull MMC fixes from Ulf Hansson: "Here are some mmc fixes intended for v4.2 rc4. Note, most of the changes are for the sdhci-esdhc-imx controller, which also required us to modify some related DTS files. Those changes have been acked by the SoC maintainer. MMC core: - Fix a reference inbalance issue for power_ro_lock_show() sysfs handler MMC host: - omap_hsmmc: Fix IRQ errorhandling for CD, DTO, and CRC - sdhci: Prevent a kernel panic while using DMA - mtk-sd: Let it depend on HAS_DMA to prevent build errors - sdhci-esdhc: Make 8BIT bus work - sdhci-esdhc-imx: Fix some regressions for DT based platforms - sdhci-pxav3: Fix a regression for DT based platforms" * tag 'mmc-4.2-rc3' of git://git.linaro.org/people/ulf.hansson/mmc: mmc: sdhci-pxav3: fix platform_data is not initialized dts: mmc: fsl-imx-esdhc: remove fsl,cd-controller support mmc: sdhci-esdhc-imx: clear f_max in boarddata mmc: sdhci-esdhc-imx: remove duplicated dts parsing mmc: sdhci: make max-frequency property in device tree work mmc: sdhci-esdhc-imx: move all non dt probe code into one function mmc: sdhci-esdhc-imx: fix cd regression for dt platform dts: imx7: fix sd card gpio polarity specified in device tree dts: imx25: fix sd card gpio polarity specified in device tree dts: imx6: fix sd card gpio polarity specified in device tree dts: imx53: fix sd card gpio polarity specified in device tree dts: imx51: fix sd card gpio polarity specified in device tree mmc: sdhci-esdhc: Make 8BIT bus work mmc: block: Add missing mmc_blk_put() in power_ro_lock_show() mmc: MMC_MTK should depend on HAS_DMA mmc: sdhci check parameters before call dma_free_coherent mmc: omap_hsmmc: Handle BADA, DEB and CEB interrupts mmc: omap_hsmmc: Fix DTO and DCRC handling
2015-07-24Merge branch 'stable' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile Pull arch/tile bugfix from Chris Metcalf: "This fixes a bug in freeing the initramfs memory" * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: tile: use free_bootmem_late() for initrd
2015-07-24x86/asm/entry/32: Revert 'Do not use R9 in SYSCALL32' commitDenys Vlasenko1-5/+9
This change reverts most of commit 53e9accf0f 'Do not use R9 in SYSCALL32'. I don't yet understand how, but code in that commit sometimes fails to preserve EBP. See https://bugzilla.kernel.org/show_bug.cgi?id=101061 "Problems while executing 32-bit code on AMD64" Reported-and-tested-by: Krzysztof A. Sobiecki <[email protected]> Signed-off-by: Denys Vlasenko <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Steven Rostedt <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Will Drewry <[email protected]> Cc: Kees Cook <[email protected]> CC: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2015-07-24x86/mm: Fix newly introduced printk format warningsThomas Gleixner1-2/+2
Signed-off-by: Thomas Gleixner <[email protected]>
2015-07-24dts: imx7: fix sd card gpio polarity specified in device treeDong Aisheng1-2/+2
cd-gpios polarity should be changed to GPIO_ACTIVE_LOW and wp-gpios should be changed to GPIO_ACTIVE_HIGH. Otherwise, the SD may not work properly due to wrong polarity inversion specified in DT after switch to common parsing function mmc_of_parse(). Signed-off-by: Dong Aisheng <[email protected]> Acked-by: Shawn Guo <[email protected]> Signed-off-by: Ulf Hansson <[email protected]>
2015-07-24dts: imx25: fix sd card gpio polarity specified in device treeDong Aisheng1-2/+3
cd-gpios polarity should be changed to GPIO_ACTIVE_LOW and wp-gpios should be changed to GPIO_ACTIVE_HIGH. Otherwise, the SD may not work properly due to wrong polarity inversion specified in DT after switch to common parsing function mmc_of_parse(). Signed-off-by: Dong Aisheng <[email protected]> Acked-by: Shawn Guo <[email protected]> Signed-off-by: Ulf Hansson <[email protected]>
2015-07-24dts: imx6: fix sd card gpio polarity specified in device treeDong Aisheng23-49/+55
cd-gpios polarity should be changed to GPIO_ACTIVE_LOW and wp-gpios should be changed to GPIO_ACTIVE_HIGH. Otherwise, the SD may not work properly due to wrong polarity inversion specified in DT after switch to common parsing function mmc_of_parse(). Signed-off-by: Dong Aisheng <[email protected]> Acked-by: Shawn Guo <[email protected]> Signed-off-by: Ulf Hansson <[email protected]>
2015-07-24dts: imx53: fix sd card gpio polarity specified in device treeDong Aisheng7-14/+14
cd-gpios polarity should be changed to GPIO_ACTIVE_LOW and wp-gpios should be changed to GPIO_ACTIVE_HIGH. Otherwise, the SD may not work properly due to wrong polarity inversion specified in DT after switch to common parsing function mmc_of_parse(). Signed-off-by: Dong Aisheng <[email protected]> Acked-by: Shawn Guo <[email protected]> Signed-off-by: Ulf Hansson <[email protected]>
2015-07-24dts: imx51: fix sd card gpio polarity specified in device treeDong Aisheng1-1/+1
cd-gpios polarity should be changed to GPIO_ACTIVE_LOW and wp-gpios should be changed to GPIO_ACTIVE_HIGH. Otherwise, the SD may not work properly due to wrong polarity inversion specified in DT after switch to common parsing function mmc_of_parse(). Signed-off-by: Dong Aisheng <[email protected]> Acked-by: Shawn Guo <[email protected]> Signed-off-by: Ulf Hansson <[email protected]>
2015-07-23m32r: Add ioreadXX/iowriteXX big-endian mmio accessorsPeter Hurley1-0/+5
commit c627f2ceb692 ("serial: 8250: Add support for big-endian MMIO accesses") added support for 32-bit big-endian mmio to the 8250 driver. Support for ioreadXXbe/iowriteXXbe io accessors was missing from m32r arch, which caused build errors. Add trivial macro mmio accessors. Reported-by: Fengguang Wu <[email protected]> Cc: Kevin Cernekee <[email protected]> Signed-off-by: Peter Hurley <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2015-07-23tile: use free_bootmem_late() for initrdChris Metcalf1-1/+1
We were previously using free_bootmem() and just getting lucky that nothing too bad happened. Signed-off-by: Chris Metcalf <[email protected]> Cc: [email protected]
2015-07-23ARM: OMAP2+: hwmod: Fix _wait_target_ready() for hwmods without syscRoger Quadros1-8/+16
For hwmods without sysc, _init_mpu_rt_base(oh) won't be called and so _find_mpu_rt_port(oh) will return NULL thus preventing ready state check on those modules after the module is enabled. This can potentially cause a bus access error if the module is accessed before the module is ready. Fix this by unconditionally calling _init_mpu_rt_base() during hwmod _init(). Do ioremap only if we need SYSC access. Eventhough _wait_target_ready() check doesn't really need MPU RT port but just the PRCM registers, we still mandate that the hwmod must have an MPU RT port if ready state check needs to be done. Else it would mean that the module is not accessible by MPU so there is no point in waiting for target to be ready. e.g. this fixes the below DCAN bus access error on AM437x-gp-evm. [ 16.672978] ------------[ cut here ]------------ [ 16.677885] WARNING: CPU: 0 PID: 1580 at drivers/bus/omap_l3_noc.c:147 l3_interrupt_handler+0x234/0x35c() [ 16.687946] 44000000.ocp:L3 Custom Error: MASTER M2 (64-bit) TARGET L4_PER_0 (Read): Data Access in User mode during Functional access [ 16.700654] Modules linked in: xhci_hcd btwilink ti_vpfe dwc3 videobuf2_core ov2659 bluetooth v4l2_common videodev ti_am335x_adc kfifo_buf industrialio c_can_platform videobuf2_dma_contig media snd_soc_tlv320aic3x pixcir_i2c_ts c_can dc [ 16.731144] CPU: 0 PID: 1580 Comm: rpc.statd Not tainted 3.14.26-02561-gf733aa036398 #180 [ 16.739747] Backtrace: [ 16.742336] [<c0011108>] (dump_backtrace) from [<c00112a4>] (show_stack+0x18/0x1c) [ 16.750285] r6:00000093 r5:00000009 r4:eab5b8a8 r3:00000000 [ 16.756252] [<c001128c>] (show_stack) from [<c05a4418>] (dump_stack+0x20/0x28) [ 16.763870] [<c05a43f8>] (dump_stack) from [<c0037120>] (warn_slowpath_common+0x6c/0x8c) [ 16.772408] [<c00370b4>] (warn_slowpath_common) from [<c00371e4>] (warn_slowpath_fmt+0x38/0x40) [ 16.781550] r8:c05d1f90 r7:c0730844 r6:c0730448 r5:80080003 r4:ed0cd210 [ 16.788626] [<c00371b0>] (warn_slowpath_fmt) from [<c027fa94>] (l3_interrupt_handler+0x234/0x35c) [ 16.797968] r3:ed0cd480 r2:c0730508 [ 16.801747] [<c027f860>] (l3_interrupt_handler) from [<c0063758>] (handle_irq_event_percpu+0x54/0x1bc) [ 16.811533] r10:ed005600 r9:c084855b r8:0000002a r7:00000000 r6:00000000 r5:0000002a [ 16.819780] r4:ed0e6d80 [ 16.822453] [<c0063704>] (handle_irq_event_percpu) from [<c00638f0>] (handle_irq_event+0x30/0x40) [ 16.831789] r10:eb2b6938 r9:eb2b6960 r8:bf011420 r7:fa240100 r6:00000000 r5:0000002a [ 16.840052] r4:ed005600 [ 16.842744] [<c00638c0>] (handle_irq_event) from [<c00661d8>] (handle_fasteoi_irq+0x74/0x128) [ 16.851702] r4:ed005600 r3:00000000 [ 16.855479] [<c0066164>] (handle_fasteoi_irq) from [<c0063068>] (generic_handle_irq+0x28/0x38) [ 16.864523] r4:0000002a r3:c0066164 [ 16.868294] [<c0063040>] (generic_handle_irq) from [<c000ef60>] (handle_IRQ+0x38/0x8c) [ 16.876612] r4:c081c640 r3:00000202 [ 16.880380] [<c000ef28>] (handle_IRQ) from [<c00084f0>] (gic_handle_irq+0x30/0x5c) [ 16.888328] r6:eab5ba38 r5:c0804460 r4:fa24010c r3:00000100 [ 16.894303] [<c00084c0>] (gic_handle_irq) from [<c05a8d80>] (__irq_svc+0x40/0x50) [ 16.902193] Exception stack(0xeab5ba38 to 0xeab5ba80) [ 16.907499] ba20: 00000000 00000006 [ 16.916108] ba40: fa1d0000 fa1d0008 ed3d3000 eab5bab4 ed3d3460 c0842af4 bf011420 eb2b6960 [ 16.924716] ba60: eb2b6938 eab5ba8c eab5ba90 eab5ba80 bf035220 bf07702c 600f0013 ffffffff [ 16.933317] r7:eab5ba6c r6:ffffffff r5:600f0013 r4:bf07702c [ 16.939317] [<bf077000>] (c_can_plat_read_reg_aligned_to_16bit [c_can_platform]) from [<bf035220>] (c_can_get_berr_counter+0x38/0x64 [c_can]) [ 16.952696] [<bf0351e8>] (c_can_get_berr_counter [c_can]) from [<bf010294>] (can_fill_info+0x124/0x15c [can_dev]) [ 16.963480] r5:ec8c9740 r4:ed3d3000 [ 16.967253] [<bf010170>] (can_fill_info [can_dev]) from [<c0502fa8>] (rtnl_fill_ifinfo+0x58c/0x8fc) [ 16.976749] r6:ec8c9740 r5:ed3d3000 r4:eb2b6780 [ 16.981613] [<c0502a1c>] (rtnl_fill_ifinfo) from [<c0503408>] (rtnl_dump_ifinfo+0xf0/0x1dc) [ 16.990401] r10:ec8c9740 r9:00000000 r8:00000000 r7:00000000 r6:ebd4d1b4 r5:ed3d3000 [ 16.998671] r4:00000000 [ 17.001342] [<c0503318>] (rtnl_dump_ifinfo) from [<c050e6e4>] (netlink_dump+0xa8/0x1e0) [ 17.009772] r10:00000000 r9:00000000 r8:c0503318 r7:ebf3e6c0 r6:ebd4d1b4 r5:ec8c9740 [ 17.018050] r4:ebd4d000 [ 17.020714] [<c050e63c>] (netlink_dump) from [<c050ec10>] (__netlink_dump_start+0x104/0x154) [ 17.029591] r6:eab5bd34 r5:ec8c9980 r4:ebd4d000 [ 17.034454] [<c050eb0c>] (__netlink_dump_start) from [<c0505604>] (rtnetlink_rcv_msg+0x110/0x1f4) [ 17.043778] r7:00000000 r6:ec8c9980 r5:00000f40 r4:ebf3e6c0 [ 17.049743] [<c05054f4>] (rtnetlink_rcv_msg) from [<c05108e8>] (netlink_rcv_skb+0xb4/0xc8) [ 17.058449] r8:eab5bdac r7:ec8c9980 r6:c05054f4 r5:ec8c9980 r4:ebf3e6c0 [ 17.065534] [<c0510834>] (netlink_rcv_skb) from [<c0504134>] (rtnetlink_rcv+0x24/0x2c) [ 17.073854] r6:ebd4d000 r5:00000014 r4:ec8c9980 r3:c0504110 [ 17.079846] [<c0504110>] (rtnetlink_rcv) from [<c05102ac>] (netlink_unicast+0x180/0x1ec) [ 17.088363] r4:ed0c6800 r3:c0504110 [ 17.092113] [<c051012c>] (netlink_unicast) from [<c0510670>] (netlink_sendmsg+0x2ac/0x380) [ 17.100813] r10:00000000 r8:00000008 r7:ec8c9980 r6:ebd4d000 r5:eab5be70 r4:eab5bee4 [ 17.109083] [<c05103c4>] (netlink_sendmsg) from [<c04dfdb4>] (sock_sendmsg+0x90/0xb0) [ 17.117305] r10:00000000 r9:eab5a000 r8:becdda3c r7:0000000c r6:ea978400 r5:eab5be70 [ 17.125563] r4:c05103c4 [ 17.128225] [<c04dfd24>] (sock_sendmsg) from [<c04e1c28>] (SyS_sendto+0xb8/0xdc) [ 17.136001] r6:becdda5c r5:00000014 r4:ecd37040 [ 17.140876] [<c04e1b70>] (SyS_sendto) from [<c000e680>] (ret_fast_syscall+0x0/0x30) [ 17.148923] r10:00000000 r8:c000e804 r7:00000122 r6:becdda5c r5:0000000c r4:becdda5c [ 17.157169] ---[ end trace 2b71e15b38f58bad ]--- Fixes: 6423d6df1440 ("ARM: OMAP2+: hwmod: check for module address space during init") Signed-off-by: Roger Quadros <[email protected]> Signed-off-by: Paul Walmsley <[email protected]> Cc: <[email protected]>
2015-07-23powerpc/powernv/ioda2: Fix calculation for memory allocated for TCE tableAlexey Kardashevskiy1-5/+6
The existing code stores the amount of memory allocated for a TCE table. At the moment it uses @offset which is a virtual offset in the TCE table which is only correct for a one level tables and it does not include memory allocated for intermediate levels. When multilevel TCE table is requested, WARN_ON in tce_iommu_create_table() prints a warning. This adds an additional counter to pnv_pci_ioda2_table_do_alloc_pages() to count actually allocated memory. Signed-off-by: Alexey Kardashevskiy <[email protected]> Reviewed-by: David Gibson <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2015-07-23ARCv2: allow selection of page size for MMUv4Alexey Brodkin1-2/+2
MMUv4 also supports the configurable page size as MMUv3. Signed-off-by: Alexey Brodkin <[email protected]> Signed-off-by: Vineet Gupta <[email protected]>
2015-07-23KVM: x86: rename quirk constants to KVM_X86_QUIRK_*Paolo Bonzini4-5/+5
Make them clearly architecture-dependent; the capability is valid for all architectures, but the argument is not. Signed-off-by: Paolo Bonzini <[email protected]>
2015-07-23KVM: vmx: obey KVM_QUIRK_CD_NW_CLEAREDXiao Guangrong1-1/+4
OVMF depends on WB to boot fast, because it only clears caches after it has set up MTRRs---which is too late. Let's do writeback if CR0.CD is set to make it happy, similar to what SVM is already doing. Signed-off-by: Xiao Guangrong <[email protected]> Tested-by: Alex Williamson <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2015-07-23KVM: x86: introduce kvm_check_has_quirkPaolo Bonzini3-2/+7
The logic of the disabled_quirks field usually results in a double negation. Wrap it in a simple function that checks the bit and negates it. Based on a patch from Xiao Guangrong. Signed-off-by: Paolo Bonzini <[email protected]>
2015-07-23KVM: MTRR: simplify kvm_mtrr_get_guest_memory_typeXiao Guangrong1-9/+10
kvm_mtrr_get_guest_memory_type never returns -1 which is implied in the current code since if @type = -1 (means no MTRR contains the range), iter.partial_map must be true Simplify the code to indicate this fact Signed-off-by: Xiao Guangrong <[email protected]> Tested-by: Alex Williamson <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2015-07-23KVM: MTRR: fix memory type handling if MTRR is completely disabledXiao Guangrong1-1/+20
Currently code uses default memory type if MTRR is fully disabled, fix it by using UC instead. Signed-off-by: Xiao Guangrong <[email protected]> Tested-by: Alex Williamson <[email protected]> Signed-off-by: Paolo Bonzini <[email protected]>
2015-07-22Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds1-13/+44
Pull networking fixes from David Miller: 1) Don't use shared bluetooth antenna in iwlwifi driver for management frames, from Emmanuel Grumbach. 2) Fix device ID check in ath9k driver, from Felix Fietkau. 3) Off by one in xen-netback BUG checks, from Dan Carpenter. 4) Fix IFLA_VF_PORT netlink attribute validation, from Daniel Borkmann. 5) Fix races in setting peeked bit flag in SKBs during datagram receive. If it's shared we have to clone it otherwise the value can easily be corrupted. Fix from Herbert Xu. 6) Revert fec clock handling change, causes regressions. From Fabio Estevam. 7) Fix use after free in fq_codel and sfq packet schedulers, from WANG Cong. 8) ipvlan bug fixes (memory leaks, missing rcu_dereference_bh, etc.) from WANG Cong and Konstantin Khlebnikov. 9) Memory leak in act_bpf packet action, from Alexei Starovoitov. 10) ARM bpf JIT bug fixes from Nicolas Schichan. 11) Fix backwards compat of ANY_LAYOUT in virtio_net driver, from Michael S Tsirkin. 12) Destruction of bond with different ARP header types not handled correctly, fix from Nikolay Aleksandrov. 13) Revert GRO receive support in ipv6 SIT tunnel driver, causes regressions because the GRO packets created cannot be processed properly on the GSO side if we forward the frame. From Herbert Xu. 14) TCCR update race and other fixes to ravb driver from Sergei Shtylyov. 15) Fix SKB leaks in caif_queue_rcv_skb(), from Eric Dumazet. 16) Fix panics on packet scheduler filter replace, from Daniel Borkmann. 17) Make sure AF_PACKET sees properly IP headers in defragmented frames (via PACKET_FANOUT_FLAG_DEFRAG option), from Edward Hyunkoo Jee. 18) AF_NETLINK cannot hold mutex in RCU callback, fix from Florian Westphal. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (84 commits) ravb: fix ring memory allocation net: phy: dp83867: Fix warning check for setting the internal delay openvswitch: allocate nr_node_ids flow_stats instead of num_possible_nodes netlink: don't hold mutex in rcu callback when releasing mmapd ring ARM: net: fix vlan access instructions in ARM JIT. ARM: net: handle negative offsets in BPF JIT. ARM: net: fix condition for load_order > 0 when translating load instructions. tcp: suppress a division by zero warning drivers: net: cpsw: remove tx event processing in rx napi poll inet: frags: fix defragmented packet's IP header for af_packet net: mvneta: fix refilling for Rx DMA buffers stmmac: fix setting of driver data in stmmac_dvr_probe sched: cls_flow: fix panic on filter replace sched: cls_flower: fix panic on filter replace sched: cls_bpf: fix panic on filter replace net/mdio: fix mdio_bus_match for c45 PHY net: ratelimit warnings about dst entry refcount underflow or overflow caif: fix leaks and race in caif_queue_rcv_skb() qmi_wwan: add the second QMI/network interface for Sierra Wireless MC7305/MC7355 ravb: fix race updating TCCR ...
2015-07-22Merge tag 'arm64-fixes' of ↵Linus Torvalds2-4/+5
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull ARM64 fixes from Catalin Marinas: - arm64 build fix following the move of the thread_struct to the end of task_struct and the asm offsets becoming too large for the AArch64 ISA - preparatory patch for moving irq_data struct members (applied now to reduce dependency for the next merging window) * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: ARM64/irq: Use access helper irq_data_get_affinity_mask() arm64: switch_to: calculate cpu context pointer using separate register
2015-07-22x86/mm: Remove region_is_ram() call from ioremapToshi Kani1-18/+6
__ioremap_caller() calls region_is_ram() to walk through the iomem_resource table to check if a target range is in RAM, which was added to improve the lookup performance over page_is_ram() (commit 906e36c5c717 "x86: use optimized ioresource lookup in ioremap function"). page_is_ram() was no longer used when this change was added, though. __ioremap_caller() then calls walk_system_ram_range(), which had replaced page_is_ram() to improve the lookup performance (commit c81c8a1eeede "x86, ioremap: Speed up check for RAM pages"). Since both checks walk through the same iomem_resource table for the same purpose, there is no need to call both functions. Aside of that walk_system_ram_range() is the only useful check at the moment because region_is_ram() always returns -1 due to an implementation bug. That bug in region_is_ram() cannot be fixed without breaking existing ioremap callers, which rely on the subtle difference of walk_system_ram_range() versus non page aligned ranges. Once these offending callers are fixed we can use region_is_ram() and remove walk_system_ram_range(). [ tglx: Massaged changelog ] Signed-off-by: Toshi Kani <[email protected]> Reviewed-by: Dan Williams <[email protected]> Cc: Roland Dreier <[email protected]> Cc: Mike Travis <[email protected]> Cc: Luis R. Rodriguez <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2015-07-22x86/mm: Move warning from __ioremap_check_ram() to the call siteToshi Kani1-3/+4
__ioremap_check_ram() has a WARN_ONCE() which is emitted when the given pfn range is not RAM. The warning is bogus in two aspects: - it never triggers since walk_system_ram_range() only calls __ioremap_check_ram() for RAM ranges. - the warning message is wrong as it says: "ioremap on RAM' after it established that the pfn range is not RAM. Move the WARN_ONCE() to __ioremap_caller(), and update the message to include the address range so we get an actual warning when something tries to ioremap system RAM. [ tglx: Massaged changelog ] Signed-off-by: Toshi Kani <[email protected]> Reviewed-by: Dan Williams <[email protected]> Cc: Roland Dreier <[email protected]> Cc: Luis R. Rodriguez <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
2015-07-22ARM64/irq: Use access helper irq_data_get_affinity_mask()Jiang Liu1-2/+2
This is a preparatory patch for moving irq_data struct members. Signed-off-by: Jiang Liu <[email protected]> Reviewed-by: Hanjun Guo <[email protected]> Cc: [email protected] Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Catalin Marinas <[email protected]>
2015-07-22arm64: switch_to: calculate cpu context pointer using separate registerWill Deacon1-2/+3
Commit 0c8c0f03e3a2 ("x86/fpu, sched: Dynamically allocate 'struct fpu'") moved the thread_struct to the bottom of task_struct. As a result, the offset is now too large to be used in an immediate add on arm64 with some kernel configs: arch/arm64/kernel/entry.S: Assembler messages: arch/arm64/kernel/entry.S:588: Error: immediate out of range arch/arm64/kernel/entry.S:597: Error: immediate out of range This patch calculates the offset using an additional register instead of an immediate offset. Fixes: 0c8c0f03e3a2 ("x86/fpu, sched: Dynamically allocate 'struct fpu'") Cc: Dave Hansen <[email protected]> Cc: Olof Johansson <[email protected]> Cc: Ingo Molnar <[email protected]> Signed-off-by: Will Deacon <[email protected]> Tested-by: Guenter Roeck <[email protected]> Signed-off-by: Catalin Marinas <[email protected]>
2015-07-21ARM: net: fix vlan access instructions in ARM JIT.Nicolas Schichan1-3/+5
This makes BPF_ANC | SKF_AD_VLAN_TAG and BPF_ANC | SKF_AD_VLAN_TAG_PRESENT have the same behaviour as the in kernel VM and makes the test_bpf LD_VLAN_TAG and LD_VLAN_TAG_PRESENT tests pass. Signed-off-by: Nicolas Schichan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2015-07-21ARM: net: handle negative offsets in BPF JIT.Nicolas Schichan1-9/+38
Previously, the JIT would reject negative offsets known during code generation and mishandle negative offsets provided at runtime. Fix that by calling bpf_internal_load_pointer_neg_helper() appropriately in the jit_get_skb_{b,h,w} slow path helpers and by forcing the execution flow to the slow path helpers when the offset is negative. Signed-off-by: Nicolas Schichan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2015-07-21ARM: net: fix condition for load_order > 0 when translating load instructions.Nicolas Schichan1-1/+1
To check whether the load should take the fast path or not, the code would check that (r_skb_hlen - load_order) is greater than the offset of the access using an "Unsigned higher or same" condition. For halfword accesses and an skb length of 1 at offset 0, that test is valid, as we end up comparing 0xffffffff(-1) and 0, so the fast path is taken and the filter allows the load to wrongly succeed. A similar issue exists for word loads at offset 0 and an skb length of less than 4. Fix that by using the condition "Signed greater than or equal" condition for the fast path code for load orders greater than 0. Signed-off-by: Nicolas Schichan <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2015-07-21Merge tag 'samsung-fixes-1' of ↵Olof Johansson5-1/+25
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes Merge "Samsung fixes for v4.2" from Kukjin Kim: From Krzysztof Kozlowski: 1. Fix exynos3250 MIPI DSI display and MIPI CSIS-2 camera sensorx after adding support for PMU regmap in exynos-video-mipi driver (issue introduced in v4.0). 2. Bring back cpufreq for exynos4210 after incomplete switch to cpufreq-dt driver in 4.2 merge window. The necessary DT changes for exynos4210 cpufreq was not applied to the same tree as rest of patchset because of multiple conflicts between clk and arm-soc trees. Unfortunately without the change the exynos4210 boards loose cpufreq feature. * tag 'samsung-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: dts: add CPU OPP and regulator supply property for exynos4210 ARM: dts: Update video-phy node with syscon phandle for exynos3250 Signed-off-by: Olof Johansson <[email protected]>
2015-07-21x86/mm/pat: Adjust default caching mode translation tablesJan Beulich1-3/+3
Make WT really mean WT (rather than UC). I can't see why commit 9cd25aac1f ("x86/mm/pat: Emulate PAT when it is disabled") didn't make this to match its changes to pat_init(). Signed-off-by: Jan Beulich <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Toshi Kani <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2015-07-21x86/fpu: Disable dependent CPU features on "noxsave"Jan Beulich1-0/+6
Complete the set of dependent features that need disabling at once: XSAVEC, AVX-512 and all currently known to the kernel extensions to it, as well as MPX need to be disabled too. Signed-off-by: Jan Beulich <[email protected]> Cc: Dave Hansen <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
2015-07-21x86/mpx: Do not set ->vm_ops on MPX VMAsKirill A. Shutemov2-21/+10
MPX setups private anonymous mapping, but uses vma->vm_ops too. This can confuse core VM, as it relies on vm->vm_ops to distinguish file VMAs from anonymous. As result we will get SIGBUS, because handle_pte_fault() thinks it's file VMA without vm_ops->fault and it doesn't know how to handle the situation properly. Let's fix that by not setting ->vm_ops. We don't really need ->vm_ops here: MPX VMA can be detected with VM_MPX flag. And vma_merge() will not merge MPX VMA with non-MPX VMA, because ->vm_flags won't match. The only thing left is name of VMA. I'm not sure if it's part of ABI, or we can just drop it. The patch keep it by providing arch_vma_name() on x86. Signed-off-by: Kirill A. Shutemov <[email protected]> Signed-off-by: Dave Hansen <[email protected]> Cc: <[email protected]> # Fixes: 6b7339f4 (mm: avoid setting up anonymous pages into file mapping) Cc: Andy Lutomirski <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Ingo Molnar <[email protected]>
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