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2016-08-09Merge tag 'gcc-plugin-infrastructure-v4.8-rc2' of ↵Linus Torvalds5-26/+56
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull gcc plugin improvements from Kees Cook: "Several fixes/improvements for the gcc plugin infrastructure: - fix a problem with gcc plugins interfering with cc-option tests. - abort more gracefully when gcc plugin headers or compiler support is missing. - improve the gcc plugin rule generation to be more dynamic, pass arguments, and build from subdirectories" * tag 'gcc-plugin-infrastructure-v4.8-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: gcc-plugins: Add support for plugin subdirectories gcc-plugins: Automate make rule generation gcc-plugins: Add support for passing plugin arguments gcc-plugins: abort builds cleanly when not supported kbuild: no gcc-plugins during cc-option tests
2016-08-09Merge tag 'platform-drivers-x86-v4.8-3' of ↵Linus Torvalds1-2/+2
git://git.infradead.org/users/dvhart/linux-platform-drivers-x86 Pull x86 platform driver update from Darren Hart: "dell-wmi: ignore battery remove/insert event" * tag 'platform-drivers-x86-v4.8-3' of git://git.infradead.org/users/dvhart/linux-platform-drivers-x86: dell-wmi: Ignore WMI event 0xe00e
2016-08-09Merge tag 'drm-fixes-for-4.8-rc2' of git://people.freedesktop.org/~airlied/linuxLinus Torvalds18-64/+95
Pull drm fixes from Dave Airlie: "This contains a bunch of amdgpu fixes, and some i915 regression fixes. It also contains some fixes for an older regression with some EDID changes and some 6bpc panels. Then there are the lockdep, cirrus and rcar-du regression fixes from this window" * tag 'drm-fixes-for-4.8-rc2' of git://people.freedesktop.org/~airlied/linux: drm/cirrus: Fix NULL pointer dereference when registering the fbdev drm/edid: Set 8 bpc color depth for displays with "DFP 1.x compliant TMDS". drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability is unknown" drm/edid: Add 6 bpc quirk for display AEO model 0. drm: Paper over locking inversion after registration rework drm: rcar-du: Link HDMI encoder with bridge drm/ttm: Wait for a BO to become idle before unbinding it from GTT drm/i915/fbdev: Check for the framebuffer before use drm/amdgpu: update golden setting of polaris10 drm/amdgpu: update golden setting of stoney drm/amdgpu: update golden setting of polaris11 drm/amdgpu: update golden setting of carrizo drm/amdgpu: update golden setting of iceland drm/amd/amdgpu: change pptable output format from ASCII to binary drm/amdgpu/ci: add mullins to default case for smc ucode drm/amdgpu/gmc7: add missing mullins case drm/i915: Never fully mask the the EI up rps interrupt on SNB/IVB drm/i915: Wait up to 3ms for the pcu to ack the cdclk change request on SKL
2016-08-09ipr: Fix sync scsi scanBrian King1-5/+6
Commit b195d5e2bffd ("ipr: Wait to do async scan until scsi host is initialized") fixed async scan for ipr, but broke sync scan for ipr. This fixes sync scan back up. Signed-off-by: Brian King <[email protected]> Reported-and-tested-by: Michael Ellerman <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-09mm: memcontrol: only mark charged pages with PageKmemcgVladimir Davydov3-14/+18
To distinguish non-slab pages charged to kmemcg we mark them PageKmemcg, which sets page->_mapcount to -512. Currently, we set/clear PageKmemcg in __alloc_pages_nodemask()/free_pages_prepare() for any page allocated with __GFP_ACCOUNT, including those that aren't actually charged to any cgroup, i.e. allocated from the root cgroup context. To avoid overhead in case cgroups are not used, we only do that if memcg_kmem_enabled() is true. The latter is set iff there are kmem-enabled memory cgroups (online or offline). The root cgroup is not considered kmem-enabled. As a result, if a page is allocated with __GFP_ACCOUNT for the root cgroup when there are kmem-enabled memory cgroups and is freed after all kmem-enabled memory cgroups were removed, e.g. # no memory cgroups has been created yet, create one mkdir /sys/fs/cgroup/memory/test # run something allocating pages with __GFP_ACCOUNT, e.g. # a program using pipe dmesg | tail # remove the memory cgroup rmdir /sys/fs/cgroup/memory/test we'll get bad page state bug complaining about page->_mapcount != -1: BUG: Bad page state in process swapper/0 pfn:1fd945c page:ffffea007f651700 count:0 mapcount:-511 mapping: (null) index:0x0 flags: 0x1000000000000000() To avoid that, let's mark with PageKmemcg only those pages that are actually charged to and hence pin a non-root memory cgroup. Fixes: 4949148ad433 ("mm: charge/uncharge kmemcg from generic page allocator paths") Reported-and-tested-by: Eric Dumazet <[email protected]> Signed-off-by: Vladimir Davydov <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-08-09ceph: initialize pathbase in the !dentry case in encode_caps_cb()Ilya Dryomov1-0/+1
pathbase is the base inode; set it to 0 if we've got no path. Coverity-id: 146348 Signed-off-by: Ilya Dryomov <[email protected]> Reviewed-by: Alex Elder <[email protected]>
2016-08-09rbd: nuke the 32-bit pool id checkIlya Dryomov1-9/+0
ceph_file_layout::pool_id is now s64. rbd_add_get_pool_id() and ceph_pg_poolid_by_name() both return an int, so it's bogus anyway. Signed-off-by: Ilya Dryomov <[email protected]> Reviewed-by: Alex Elder <[email protected]>
2016-08-09tracing: Fix tick_stop tracepoint symbols for user exportSteven Rostedt (Red Hat)1-3/+11
The symbols used in the tick_stop tracepoint were not being converted properly into integers in the trace_stop format file. Instead we had this: print fmt: "success=%d dependency=%s", REC->success, __print_symbolic(REC->dependency, { 0, "NONE" }, { (1 << TICK_DEP_BIT_POSIX_TIMER), "POSIX_TIMER" }, { (1 << TICK_DEP_BIT_PERF_EVENTS), "PERF_EVENTS" }, { (1 << TICK_DEP_BIT_SCHED), "SCHED" }, { (1 << TICK_DEP_BIT_CLOCK_UNSTABLE), "CLOCK_UNSTABLE" }) User space tools have no idea how to parse "TICK_DEP_BIT_SCHED" or the other symbols used to do the bit shifting. The reason is that the conversion was done with using the TICK_DEP_MASK_* symbols which are just macros that convert to the BIT shift itself (with the exception of NONE, which was converted properly, because it doesn't use bits, and is defined as zero). The TICK_DEP_BIT_* needs to be denoted by TRACE_DEFINE_ENUM() in order to have this properly converted for user space tools to parse this event. Cc: [email protected] Cc: Frederic Weisbecker <[email protected]> Fixes: e6e6cc22e067 ("nohz: Use enum code for tick stop failure tracing message") Reported-by: Luiz Capitulino <[email protected]> Tested-by: Luiz Capitulino <[email protected]> Signed-off-by: Steven Rostedt <[email protected]>
2016-08-09metag: Drop show_mem() from mem_init()James Hogan1-1/+0
The recent commit 599d0c954f91 ("mm, vmscan: move LRU lists to node"), changed memory management code so that show_mem() is no longer safe to call prior to setup_per_cpu_pageset(), as pgdat->per_cpu_nodestats will still be NULL. This causes an oops on metag due to the call to show_mem() from mem_init(): node_page_state_snapshot(...) + 0x48 pgdat_reclaimable(struct pglist_data * pgdat = 0x402517a0) show_free_areas(unsigned int filter = 0) + 0x2cc show_mem(unsigned int filter = 0) + 0x18 mem_init() mm_init() start_kernel() + 0x204 This wasn't a problem before with zone_reclaimable() as zone_pcp_init() was already setting zone->pageset to &boot_pageset, via setup_arch() and paging_init(), which happens before mm_init(): zone_pcp_init(...) free_area_init_core(...) + 0x138 free_area_init_node(int nid = 0, ...) + 0x1a0 free_area_init_nodes(...) + 0x440 paging_init(unsigned long mem_end = 0x4fe00000) + 0x378 setup_arch(char ** cmdline_p = 0x4024e038) + 0x2b8 start_kernel() + 0x54 No other arches appear to call show_mem() during boot, and it doesn't really add much value to the log, so lets just drop it from mem_init(). Signed-off-by: James Hogan <[email protected]> Acked-by: Mel Gorman <[email protected]> Cc: [email protected]
2016-08-09virtio/s390: deprecate old transportCornelia Huck3-1/+20
There only ever have been two host implementations of the old s390-virtio (pre-ccw) transport: the experimental kuli userspace, and qemu. As qemu switched its default to ccw with 2.4 (with most users having used ccw well before that) and removed the old transport entirely in 2.6, s390-virtio probably hasn't been in active use for quite some time and is therefore likely to bitrot. Let's start the slow march towards removing the code by deprecating it. Note that this also deprecates the early virtio console code, which has been causing trouble in the guest without being wired up in any relevant hypervisor code. Acked-by: Christian Borntraeger <[email protected]> Reviewed-by: Dong Jia Shi <[email protected]> Reviewed-by: Sascha Silbe <[email protected]> Signed-off-by: Cornelia Huck <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09virtio/s390: keep early_put_charsChristian Borntraeger1-1/+1
In case the registration of the hvc tty never happens AND the kernel thinks that hvc0 is the preferred console we should keep the early printk function to avoid a kernel panic due to code being removed. Signed-off-by: Christian Borntraeger <[email protected]> Signed-off-by: Jing Liu <[email protected]> Signed-off-by: Cornelia Huck <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09virtio_blk: Fix a slient kernel panicMinfei Huang1-18/+8
We do a lot of memory allocation in function init_vq, and don't handle the allocation failure properly. Then this function will return 0, although initialization fails due to lacking memory. At that moment, kernel will panic in guest machine, if virtio is used to drive disk. To fix this bug, we should take care of allocation failure, and return correct value to let caller know what happen. Tested-by: Chao Fan <[email protected]> Signed-off-by: Minfei Huang <[email protected]> Signed-off-by: Minfei Huang <[email protected]> Reviewed-by: Cornelia Huck <[email protected]> Reviewed-by: Stefan Hajnoczi <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09virtio-vsock: fix include guard typoStefan Hajnoczi1-1/+1
Signed-off-by: Stefan Hajnoczi <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09vhost/vsock: fix vhost virtio_vsock_pkt use-after-freeStefan Hajnoczi1-1/+5
Stash the packet length in a local variable before handing over ownership of the packet to virtio_transport_recv_pkt() or virtio_transport_free_pkt(). This patch solves the use-after-free since pkt is no longer guaranteed to be alive. Reported-by: Dan Carpenter <[email protected]> Signed-off-by: Stefan Hajnoczi <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-099p/trans_virtio: use kvfree() for iov_iter_get_pages_alloc()Vegard Nossum1-2/+2
The memory allocated by iov_iter_get_pages_alloc() can be allocated with vmalloc() if kmalloc() failed -- see get_pages_array(). In that case we need to free it with vfree(), so let's use kvfree(). The bug manifests like this: BUG: unable to handle kernel paging request at ffffeb0400072da0 IP: [<ffffffff8139c67b>] kfree+0x4b/0x140 PGD 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 2 PID: 675 Comm: trinity-c2 Not tainted 4.7.0-rc7+ #14 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Ubuntu-1.8.2-1ubuntu1 04/01/2014 task: ffff8800badef2c0 ti: ffff880069208000 task.ti: ffff880069208000 RIP: 0010:[<ffffffff8139c67b>] [<ffffffff8139c67b>] kfree+0x4b/0x140 RSP: 0000:ffff88006920f3f0 EFLAGS: 00010282 RAX: ffffea0000000000 RBX: ffffc90001cb6000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: 0000000000000246 RDI: ffffc90001cb6000 RBP: ffff88006920f410 R08: 0000000000000000 R09: dffffc0000000000 R10: ffff8800badefa30 R11: 0000056a3d3b0d9f R12: ffff88006920f620 R13: ffffeb0400072d80 R14: ffff8800baa94078 R15: 0000000000000000 FS: 00007fbd2b437700(0000) GS:ffff88011af00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffeb0400072da0 CR3: 000000006926d000 CR4: 00000000000006e0 Stack: 0000000000000001 ffff88006920f620 ffffed001755280f ffff8800baa94078 ffff88006920f6a8 ffffffff8310442b dffffc0000000000 ffff8800badefa30 ffff8800badefa28 ffff88011af1fba0 1ffff1000d241e98 ffff8800ba892150 Call Trace: [<ffffffff8310442b>] p9_virtio_zc_request+0x72b/0xdb0 [<ffffffff830f2116>] p9_client_zc_rpc.constprop.8+0x246/0xb10 [<ffffffff830f5d79>] p9_client_read+0x4c9/0x750 [<ffffffff8175ceac>] v9fs_fid_readpage+0x14c/0x320 [<ffffffff8175d0b6>] v9fs_vfs_readpage+0x36/0x50 [<ffffffff812c6f13>] filemap_fault+0x9a3/0xe60 [<ffffffff81331878>] __do_fault+0x158/0x300 [<ffffffff81339e01>] handle_mm_fault+0x1cf1/0x3c80 [<ffffffff810c0aaa>] __do_page_fault+0x30a/0x8e0 [<ffffffff810c10df>] do_page_fault+0x2f/0x80 [<ffffffff810b5b07>] do_async_page_fault+0x27/0xa0 [<ffffffff83296c48>] async_page_fault+0x28/0x30 Code: 00 80 41 54 53 49 01 fd 48 0f 42 05 b0 39 67 02 48 89 fb 49 01 c5 48 b8 00 00 00 00 00 ea ff ff 49 c1 ed 0c 49 c1 e5 06 49 01 c5 <49> 8b 45 20 48 8d 50 ff a8 01 4c 0f 45 ea 49 8b 55 20 48 8d 42 RIP [<ffffffff8139c67b>] kfree+0x4b/0x140 RSP <ffff88006920f3f0> CR2: ffffeb0400072da0 ---[ end trace f3d59a04bafec038 ]--- Cc: Al Viro <[email protected]> Signed-off-by: Vegard Nossum <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09virtio: fix error handling for debug buildsMichael S. Tsirkin1-0/+1
On error, virtqueue_add calls START_USE but not END_USE. Thankfully that's normally empty anyway, but might not be when debugging. Fix it up. Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09virtio: fix memory leak in virtqueue_add()Wei Yongjun1-0/+2
When using the indirect buffers feature, 'desc' is allocated in virtqueue_add() but isn't freed before leaving on a ring full error, causing a memory leak. For example, it seems rather clear that this can trigger with virtio net if mergeable buffers are not used. Cc: [email protected] Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]>
2016-08-09powerpc/pnv/pci: Fix incorrect PE reservation attempt on some 64-bit BARsBenjamin Herrenschmidt1-10/+20
The generic allocation code may sometimes decide to assign a prefetchable 64-bit BAR to the M32 window. In fact it may also decide to allocate a 64-bit non-prefetchable BAR to the M64 one ! So using the resource flags as a test to decide which window was used for PE allocation is just wrong and leads to insane PE numbers. Instead, compare the addresses to figure it out. Signed-off-by: Benjamin Herrenschmidt <[email protected]> [mpe: Rename the function as agreed by Ben & Gavin] Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/book3s: Fix MCE console messages for unrecoverable MCE.Mahesh Salgaonkar2-1/+3
When machine check occurs with MSR(RI=0), it means MC interrupt is unrecoverable and kernel goes down to panic path. But the console message still shows it as recovered. This patch fixes the MCE console messages. Fixes: 36df96f8acaf ("powerpc/book3s: Decode and save machine check event.") Signed-off-by: Mahesh Salgaonkar <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/pci: Fix endian bug in fixed PHB numberingMichael Ellerman1-2/+5
The recent commit 63a72284b159 ("powerpc/pci: Assign fixed PHB number based on device-tree properties"), added code to read a 64-bit property from the device tree, and if not found read a 32-bit property (reg). There was a bug in the 32-bit case, on big endian machines, due to the use of the 64-bit value to read the 32-bit property. The cast of &prop means we end up writing to the high 32-bit of prop, leaving the low 32-bits containing whatever junk was on the stack. If that junk value was non-zero, and < MAX_PHBS, we would end up using it as the PHB id. This results in users seeing what appear to be random PHB ids. Fix it by reading into a u32 property and then assigning that to the u64 value, letting the CPU do the correct conversions for us. Fixes: 63a72284b159 ("powerpc/pci: Assign fixed PHB number based on device-tree properties") Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/eeh: Switch to conventional PCI address output in EEH logGuilherme G. Piccoli1-2/+2
This is a very minor/trivial fix for the output of PCI address on EEH logs. The PCI address on "OF node" field currently is using ":" as a separator for the function, but the usual separator is ".". This patch changes the separator to dot, so the PCI address is printed as usual. Signed-off-by: Guilherme G. Piccoli <[email protected]> Reviewed-by: Gavin Shan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09cxl: Fix sparse warningsAndrew Donnellan2-2/+2
Make native_irq_wait() static and use NULL rather than 0 to initialise phb->cfg_data in cxl_pci_vphb_add() to remove sparse warnings. Signed-off-by: Andrew Donnellan <[email protected]> Reviewed-by: Matthew R. Ochs <[email protected]> Acked-by: Ian Munsie <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09cxl: Fix NULL dereference in cxl_context_init() on PowerVM guestsAndrew Donnellan3-4/+4
Commit f67a6722d650 ("cxl: Workaround PE=0 hardware limitation in Mellanox CX4") added a "min_pe" field to struct cxl_service_layer_ops, to allow us to work around a Mellanox CX-4 hardware limitation. When allocating the PE number in cxl_context_init(), we read from ctx->afu->adapter->native->sl_ops->min_pe to get the minimum PE number. Unsurprisingly, in a PowerVM guest ctx->afu->adapter->native is NULL, and guests don't have a cxl_service_layer_ops struct anywhere. Move min_pe from struct cxl_service_layer_ops to struct cxl so it's accessible in both native and PowerVM environments. For the Mellanox CX-4, set the min_pe value in set_sl_ops(). Fixes: f67a6722d650 ("cxl: Workaround PE=0 hardware limitation in Mellanox CX4") Reported-by: Frederic Barrat <[email protected]> Signed-off-by: Andrew Donnellan <[email protected]> Acked-by: Ian Munsie <[email protected]> Reviewed-by: Frederic Barrat <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09cxl: Use fixed width predefined types in data structure.Philippe Bergheaud1-2/+2
This patch fixes a regression introduced by commit b810253bd934 ("cxl: Add mechanism for delivering AFU driver specific events"). It changes the type u8 to __u8 in the uapi header cxl.h, because the former is a kernel internal type, and may not be defined in userland build environments, in particular when cross-compiling libcxl on x86_64 linux machines (RHEL6.7 and Ubuntu 16.04). This patch also changes the size of the field data_size, and makes it constant, to support 32-bit userland applications running on big-endian ppc64 kernels transparently. mpe: This is an ABI change, however the ABI was only added during the 4.8 merge window so has never been part of a released kernel - therefore we give ourselves permission to change it. Fixes: b810253bd934 ("cxl: Add mechanism for delivering AFU driver specific events") Signed-off-by: Philippe Bergheaud <[email protected]> Reviewed-by: Frederic Barrat <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/vdso: Add missing include fileGuenter Roeck1-0/+1
Some powerpc builds fail with the following buld error. In file included from ./arch/powerpc/include/asm/mmu_context.h:11:0, from arch/powerpc/kernel/vdso.c:28: arch/powerpc/include/asm/cputhreads.h: In function 'get_tensr': arch/powerpc/include/asm/cputhreads.h:101:2: error: implicit declaration of function 'cpu_has_feature' Fixes: b92a226e5284 ("powerpc: Move cpu_has_feature() to a separate file") Signed-off-by: Guenter Roeck <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc: Fix unused function warning 'lmb_to_memblock'Alastair D'Silva1-13/+13
This patch fixes the following warning: arch/powerpc/platforms/pseries/hotplug-memory.c:323:29: error: 'lmb_to_memblock' defined but not used [-Werror=unused-function] static struct memory_block *lmb_to_memblock(struct of_drconf_cell *lmb) ^~~~~~~~~~~~~~~ The only consumer of this function is 'dlpar_remove_lmb', which is enabled with CONFIG_MEMORY_HOTREMOVE, so move it into the same ifdef block. Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/powernv: Fix MCE handler to avoid trashing CR0/CR1 registers.Mahesh Salgaonkar1-29/+40
The current implementation of MCE early handling modifies CR0/1 registers without saving its old values. Fix this by moving early check for powersaving mode to machine_check_handle_early(). The power architecture 2.06 or later allows the possibility of getting machine check while in nap/sleep/winkle. The last bit of HSPRG0 is set to 1, if thread is woken up from winkle. Hence, clear the last bit of HSPRG0 (r13) before MCE handler starts using it as paca pointer. Also, the current code always puts the thread into nap state irrespective of whatever idle state it woke up from. Fix that by looking at paca->thread_idle_state and put the thread back into same state where it came from. Fixes: 1c51089f777b ("powerpc/book3s: Return from interrupt if coming from evil context.") Reported-by: Paul Mackerras <[email protected]> Signed-off-by: Mahesh Salgaonkar <[email protected]> Reviewed-by: Shreyas B. Prabhu <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09ALSA: usb-audio: Add quirk for ELP HD USB CameraVittorio Gambaletta (VittGam)1-0/+1
The ELP HD USB Camera (05a3:9420) needs this quirk for suppressing the unsupported sample rate inquiry. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=98481 Cc: <[email protected]> Signed-off-by: Vittorio Gambaletta <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
2016-08-09ALSA: usb-audio: Add a sample rate quirk for Creative Live! Cam Socialize HD ↵Piotr Karasinski1-0/+1
(VF0610) VF0610 does not support reading the sample rate which leads to many lines of "cannot get freq at ep 0x82". This patch adds the USB ID (0x041E:4080) to snd_usb_get_sample_rate_quirk() list. Signed-off-by: Piotr Karasinski <[email protected]> Cc: <[email protected]> Signed-off-by: Takashi Iwai <[email protected]>
2016-08-09powerpc/powernv: Move IDLE_STATE_ENTER_SEQ macro to cpuidle.hMahesh Salgaonkar2-12/+13
Move IDLE_STATE_ENTER_SEQ macro to cpuidle.h so that MCE handler changes in subsequent patch can use it. No functionality change. Signed-off-by: Mahesh Salgaonkar <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/powernv: Load correct TOC pointer while waking up from winkle.Mahesh Salgaonkar1-1/+4
The function pnv_restore_hyp_resource() loads the TOC into r2 from the invalid PACA pointer before fixing r13 value. This do not affect POWER ISA 3.0 but it does have an impact on POWER ISA 2.07 or less leading CPU to get stuck forever. login: [ 471.830433] Processor 120 is stuck. This can be easily reproducible using following steps: - Turn off SMT $ ppc64_cpu --smt=off - offline/online any online cpu (Thread 0 of any core which is online) $ echo 0 > /sys/devices/system/cpu/cpu<num>/online $ echo 1 > /sys/devices/system/cpu/cpu<num>/online For POWER ISA 2.07 or less, the last bit of HSPRG0 is set indicating that thread is waking up from winkle. Hence, the last bit of HSPRG0(r13) needs to be clear before accessing it as PACA to avoid loading invalid values from invalid PACA pointer. Fix this by loading TOC after r13 register is corrected. Fixes: bcef83a00dc4 ("powerpc/powernv: Add platform support for stop instruction") Signed-off-by: Mahesh Salgaonkar <[email protected]> Acked-by: Vaidyanathan Srinivasan <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/powernv/ioda: Fix TCE invalidate to work in real mode againAlexey Kardashevskiy1-1/+1
Commit fd141d1a99a3 ("powerpc/powernv/pci: Rework accessing the TCE invalidate register") broke TCE invalidation on IODA2/PHB3 for real mode. This makes invalidate work again. Fixes: fd141d1a99a3 ("powerpc/powernv/pci: Rework accessing the TCE invalidate register") Signed-off-by: Alexey Kardashevskiy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/cell: Add missing error code in spufs_mkgang()Dan Carpenter1-1/+3
We should return -ENOMEM if alloc_spu_gang() fails. Signed-off-by: Dan Carpenter <[email protected]> Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09powerpc/xics: Properly set Edge/Level type and enable resendBenjamin Herrenschmidt6-10/+63
This sets the type of the interrupt appropriately. We set it as follow: - If not mapped from the device-tree, we use edge. This is the case of the virtual interrupts and PCI MSIs for example. - If mapped from the device-tree and #interrupt-cells is 2 (PAPR compliant), we use the second cell to set the appropriate type - If mapped from the device-tree and #interrupt-cells is 1 (current OPAL on P8 does that), we assume level sensitive since those are typically going to be the PSI LSIs which are level sensitive. Additionally, we mark the interrupts requested via the opal_interrupts property all level. This is a bit fishy but the best we can do until we fix OPAL to properly expose them with a complete descriptor. It is also correct for the current HW anyway as OPAL interrupts are currently PCI error and PSI interrupts which are level. Finally now that edge interrupts are properly identified, we can enable CONFIG_HARDIRQS_SW_RESEND which will make the core re-send them if they occur while masked, which some drivers rely upon. This fixes issues with lost interrupts on some Mellanox adapters. Signed-off-by: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09crypto: crc32c-vpmsum - Convert to CPU feature based module autoloadingAnton Blanchard1-1/+2
This patch utilises the GENERIC_CPU_AUTOPROBE infrastructure to automatically load the crc32c-vpmsum module if the CPU supports it. Signed-off-by: Anton Blanchard <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2016-08-09drm/cirrus: Fix NULL pointer dereference when registering the fbdevBoris Brezillon1-2/+11
cirrus_modeset_init() is initializing/registering the emulated fbdev and, since commit c61b93fe51b1 ("drm/atomic: Fix remaining places where !funcs->best_encoder is valid"), DRM internals can access/test some of the fields in mode_config->funcs as part of the fbdev registration process. Make sure dev->mode_config.funcs is properly set to avoid dereferencing a NULL pointer. Reported-by: Mike Marshall <[email protected]> Reported-by: Eric W. Biederman <[email protected]> Signed-off-by: Boris Brezillon <[email protected]> Fixes: c61b93fe51b1 ("drm/atomic: Fix remaining places where !funcs->best_encoder is valid") Signed-off-by: Dave Airlie <[email protected]>
2016-08-08gcc-plugins: Add support for plugin subdirectoriesEmese Revfy2-4/+8
This adds support for building more complex gcc plugins that live in a subdirectory instead of just in a single source file. Reported-by: PaX Team <[email protected]> Signed-off-by: Emese Revfy <[email protected]> [kees: clarified commit message] Signed-off-by: Kees Cook <[email protected]>
2016-08-08gcc-plugins: Automate make rule generationEmese Revfy1-2/+1
There's no reason to repeat the same names in the Makefile when the .so files have already been listed. The .o list can be generated from them. Reported-by: PaX Team <[email protected]> Signed-off-by: Emese Revfy <[email protected]> [kees: clarified commit message] Signed-off-by: Kees Cook <[email protected]>
2016-08-08gcc-plugins: Add support for passing plugin argumentsEmese Revfy1-1/+1
The latent_entropy plugin needs to pass arguments, so this adds the support. Signed-off-by: Emese Revfy <[email protected]> Signed-off-by: Kees Cook <[email protected]>
2016-08-08gcc-plugins: abort builds cleanly when not supportedKees Cook3-16/+39
When the compiler doesn't support gcc plugins (either due to missing headers or too old a version), report the problem and abort the build instead of emitting a warning and letting the build founder with arcane compiler errors. Signed-off-by: Kees Cook <[email protected]>
2016-08-08kbuild: no gcc-plugins during cc-option testsEmese Revfy1-3/+7
The gcc-plugins arguments should not be included when performing cc-option tests. Steps to reproduce: 1) make mrproper 2) make defconfig 3) enable GCC_PLUGINS, GCC_PLUGIN_CYC_COMPLEXITY 4) enable FUNCTION_TRACER (it will select other options as well) 5) make && make modules Build errors: MODPOST 18 modules ERROR: "__fentry__" [net/netfilter/xt_nat.ko] undefined! ERROR: "__fentry__" [net/netfilter/xt_mark.ko] undefined! ERROR: "__fentry__" [net/netfilter/xt_addrtype.ko] undefined! ERROR: "__fentry__" [net/netfilter/xt_LOG.ko] undefined! ERROR: "__fentry__" [net/netfilter/nf_nat_sip.ko] undefined! ERROR: "__fentry__" [net/netfilter/nf_nat_irc.ko] undefined! ERROR: "__fentry__" [net/netfilter/nf_nat_ftp.ko] undefined! ERROR: "__fentry__" [net/netfilter/nf_nat.ko] undefined! Reported-by: Laura Abbott <[email protected]> Signed-off-by: Emese Revfy <[email protected]> [kees: renamed variable, clarified commit message] Signed-off-by: Kees Cook <[email protected]>
2016-08-09drm/edid: Set 8 bpc color depth for displays with "DFP 1.x compliant TMDS".Mario Kleiner1-0/+14
According to E-EDID spec 1.3, table 3.9, a digital video sink with the "DFP 1.x compliant TMDS" bit set is "signal compatible with VESA DFP 1.x TMDS CRGB, 1 pixel / clock, up to 8 bits / color MSB aligned". For such displays, the DFP spec 1.0, section 3.10 "EDID support" says: "If the DFP monitor only supports EDID 1.X (1.1, 1.2, etc.) without extensions, the host will make the following assumptions: 1. 24-bit MSB-aligned RGB TFT 2. DE polarity is active high 3. H and V syncs are active high 4. Established CRT timings will be used 5. Dithering will not be enabled on the host" So if we don't know the bit depth of the display from additional colorimetry info we should assume 8 bpc / 24 bpp by default. This patch adds info->bpc = 8 assignement for that case. Signed-off-by: Mario Kleiner <[email protected]> Cc: Jani Nikula <[email protected]> Cc: Ville Syrjälä <[email protected]> Cc: Daniel Vetter <[email protected]> Signed-off-by: Dave Airlie <[email protected]>
2016-08-09drm/i915/dp: Revert "drm/i915/dp: fall back to 18 bpp when sink capability ↵Mario Kleiner1-15/+5
is unknown" This reverts commit 013dd9e03872 ("drm/i915/dp: fall back to 18 bpp when sink capability is unknown") This commit introduced a regression into stable kernels, as it reduces output color depth to 6 bpc for any video sink connected to a Displayport connector if that sink doesn't report a specific color depth via EDID, or if our EDID parser doesn't actually recognize the proper bpc from EDID. Affected are active DisplayPort->VGA converters and active DisplayPort->DVI converters. Both should be able to handle 8 bpc, but are degraded to 6 bpc with this patch. The reverted commit was meant to fix Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=105331 A followup patch implements a fix for that specific bug, which is caused by a faulty EDID of the affected DP panel by adding a new EDID quirk for that panel. DP 18 bpp fallback handling and other improvements to DP sink bpc detection will be handled for future kernels in a separate series of patches. Please backport to stable. Signed-off-by: Mario Kleiner <[email protected]> Acked-by: Jani Nikula <[email protected]> Cc: [email protected] Cc: Ville Syrjälä <[email protected]> Cc: Daniel Vetter <[email protected]> Signed-off-by: Dave Airlie <[email protected]>
2016-08-09drm/edid: Add 6 bpc quirk for display AEO model 0.Mario Kleiner1-0/+8
Bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=105331 reports that the "AEO model 0" display is driven with 8 bpc without dithering by default, which looks bad because that panel is apparently a 6 bpc DP panel with faulty EDID. A fix for this was made by commit 013dd9e03872 ("drm/i915/dp: fall back to 18 bpp when sink capability is unknown"). That commit triggers new regressions in precision for DP->DVI and DP->VGA displays. A patch is out to revert that commit, but it will revert video output for the AEO model 0 panel to 8 bpc without dithering. The EDID 1.3 of that panel, as decoded from the xrandr output attached to that bugzilla bug report, is somewhat faulty, and beyond other problems also sets the "DFP 1.x compliant TMDS" bit, which according to DFP spec means to drive the panel with 8 bpc and no dithering in absence of other colorimetry information. Try to make the original bug reporter happy despite the faulty EDID by adding a quirk to mark that panel as 6 bpc, so 6 bpc output with dithering creates a nice picture. Tested by injecting the edid from the fdo bug into a DP connector via drm_kms_helper.edid_firmware and verifying the 6 bpc + dithering is selected. This patch should be backported to stable. Signed-off-by: Mario Kleiner <[email protected]> Cc: [email protected] Cc: Jani Nikula <[email protected]> Cc: Ville Syrjälä <[email protected]> Cc: Daniel Vetter <[email protected]> Signed-off-by: Dave Airlie <[email protected]>
2016-08-08Merge tag 'lkdtm-v4.8-rc1' of ↵Linus Torvalds2-2/+3
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull lkdtm update from Kees Cook: "Fix rebuild problem with LKDTM's rodata test" [ This, and the usercopy branch, both came in before the merge window closed, but ended up in my 'need to look more' queue and thus got merged only after rc1 was out ] * tag 'lkdtm-v4.8-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: lkdtm: Fix targets for objcopy usage lkdtm: fix false positive warning from -Wmaybe-uninitialized
2016-08-08Merge tag 'usercopy-v4.8' of ↵Linus Torvalds28-22/+555
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull usercopy protection from Kees Cook: "Tbhis implements HARDENED_USERCOPY verification of copy_to_user and copy_from_user bounds checking for most architectures on SLAB and SLUB" * tag 'usercopy-v4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: mm: SLUB hardened usercopy support mm: SLAB hardened usercopy support s390/uaccess: Enable hardened usercopy sparc/uaccess: Enable hardened usercopy powerpc/uaccess: Enable hardened usercopy ia64/uaccess: Enable hardened usercopy arm64/uaccess: Enable hardened usercopy ARM: uaccess: Enable hardened usercopy x86/uaccess: Enable hardened usercopy mm: Hardened usercopy mm: Implement stack frame object validation mm: Add is_migrate_cma_page
2016-08-08unsafe_[get|put]_user: change interface to use a error target labelLinus Torvalds4-18/+17
When I initially added the unsafe_[get|put]_user() helpers in commit 5b24a7a2aa20 ("Add 'unsafe' user access functions for batched accesses"), I made the mistake of modeling the interface on our traditional __[get|put]_user() functions, which return zero on success, or -EFAULT on failure. That interface is fairly easy to use, but it's actually fairly nasty for good code generation, since it essentially forces the caller to check the error value for each access. In particular, since the error handling is already internally implemented with an exception handler, and we already use "asm goto" for various other things, we could fairly easily make the error cases just jump directly to an error label instead, and avoid the need for explicit checking after each operation. So switch the interface to pass in an error label, rather than checking the error value in the caller. Best do it now before we start growing more users (the signal handling code in particular would be a good place to use the new interface). So rather than if (unsafe_get_user(x, ptr)) ... handle error .. the interface is now unsafe_get_user(x, ptr, label); where an error during the user mode fetch will now just cause a jump to 'label' in the caller. Right now the actual _implementation_ of this all still ends up being a "if (err) goto label", and does not take advantage of any exception label tricks, but for "unsafe_put_user()" in particular it should be fairly straightforward to convert to using the exception table model. Note that "unsafe_get_user()" is much harder to convert to a clever exception table model, because current versions of gcc do not allow the use of "asm goto" (for the exception) with output values (for the actual value to be fetched). But that is hopefully not a limitation in the long term. [ Also note that it might be a good idea to switch unsafe_get_user() to actually _return_ the value it fetches from user space, but this commit only changes the error handling semantics ] Signed-off-by: Linus Torvalds <[email protected]>
2016-08-08rbd: destroy header_oloc in rbd_dev_release()Ilya Dryomov1-0/+1
Purely cosmetic at this point, as rbd doesn't use RADOS namespaces and hence rbd_dev->header_oloc->pool_ns is always NULL. Signed-off-by: Ilya Dryomov <[email protected]>
2016-08-08ceph: fix null pointer dereference in ceph_flush_snaps()Yan, Zheng1-1/+4
Signed-off-by: Yan, Zheng <[email protected]>
2016-08-08libceph: using kfree_rcu() to simplify the codeWei Yongjun1-7/+1
The callback function of call_rcu() just calls a kfree(), so we can use kfree_rcu() instead of call_rcu() + callback function. Signed-off-by: Wei Yongjun <[email protected]> Signed-off-by: Ilya Dryomov <[email protected]>
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