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2017-05-02CIFS: Add asynchronous write support through kernel AIOPavel Shilovsky2-51/+139
This patch adds support to process write calls passed by io_submit() asynchronously. It based on the previously introduced async context that allows to process i/o responses in a separate thread and return the caller immediately for asynchronous calls. This improves writing performance of single threaded applications with increasing of i/o queue depth size. Signed-off-by: Pavel Shilovsky <[email protected]> Signed-off-by: Steve French <[email protected]>
2017-05-02CIFS: Add asynchronous read support through kernel AIOPavel Shilovsky2-39/+131
This patch adds support to process read calls passed by io_submit() asynchronously. It based on the previously introduced async context that allows to process i/o responses in a separate thread and return the caller immediately for asynchronous calls. This improves reading performance of single threaded applications with increasing of i/o queue depth size. Signed-off-by: Pavel Shilovsky <[email protected]> Signed-off-by: Steve French <[email protected]>
2017-05-02CIFS: Add asynchronous context to support kernel AIOPavel Shilovsky3-0/+139
Currently the code doesn't recognize asynchronous calls passed by io_submit() and processes all calls synchronously. This is not what kernel AIO expects. This patch introduces a new async context that keeps track of all issued i/o requests and moves a response collecting procedure to a separate thread. This allows to return to a caller immediately for async calls and call iocb->ki_complete() once all requests are completed. For sync calls the current thread simply waits until all requests are completed. Signed-off-by: Pavel Shilovsky <[email protected]> Signed-off-by: Steve French <[email protected]>
2017-05-02cifs: fix IPv6 link local, with scope id, address parsingDaniel N Pettersson1-2/+7
When the IP address is gotten from the UNC, use only the address part of the UNC. Else all after the percent sign in an IPv6 link local address is interpreted as a scope id. This includes the slash and share name. A scope id is expected to be an integer and any trailing characters makes the conversion to integer fail. Example of mount command that fails: mount -i -t cifs //fe80::6a05:caff:fe3e:8ffc%2/test /mnt/t -o sec=none Signed-off-by: Daniel N Pettersson <[email protected]> Signed-off-by: Steve French <[email protected]>
2017-05-02cifs: small underflow in cnvrtDosUnixTm()Dan Carpenter1-3/+3
January is month 1. There is no zero-th month. If someone passes a zero month then it means we read from one space before the start of the total_days_of_prev_months[] array. We may as well also be strict about days as well. Fixes: 1bd5bbcb6531 ("[CIFS] Legacy time handling for Win9x and OS/2 part 1") Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Steve French <[email protected]>
2017-05-02Merge branch 'tipc-refactor-socket-receive-functions'David S. Miller1-144/+122
Jon Maloy says: ==================== tipc: refactor socket receive functions We try to make the functions tipc_sk_recvmsg() and tipc_sk_recvstream() more readable. ==================== Signed-off-by: David S. Miller <[email protected]>
2017-05-02tipc: refactor function tipc_sk_recv_stream()Jon Paul Maloy1-84/+71
We try to make this function more readable by improving variable names and comments, using more stack variables, and doing some smaller changes to the logics. We also rename the function to make it consistent with naming conventions used elsewhere in the code. Reviewed-by: Parthasarathy Bhuvaragan <[email protected]> Signed-off-by: Jon Maloy <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02tipc: refactor function tipc_sk_recvmsg()Jon Paul Maloy1-59/+50
We try to make this function more readable by improving variable names and comments, plus some minor changes to the logics. Reviewed-by: Parthasarathy Bhuvaragan <[email protected]> Signed-off-by: Jon Maloy <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02Merge branch 'thunderx-xdp'David S. Miller6-124/+657
Sunil Goutham says: ==================== net: thunderx: Adds XDP support This patch series adds support for XDP to ThunderX NIC driver which is used on CN88xx, CN81xx and CN83xx platforms. Patches 1-4 are performance improvement and cleanup patches which are done keeping XDP performance bottlenecks in view. Rest of the patches adds actual XDP support. ==================== Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Optimize page recycling for XDPSunil Goutham2-7/+51
Driver follows a method of taking one extra reference on the page for recycling which is fine in usual packet path where each 64KB page is segmented into multiple receive buffers. But in XDP mode since there is just one receive buffer per page taking extra page reference itself becomes big bottleneck consuming ~50% of CPU cycles due to atomic operations. This patch adds a internal ref count in pgcache for each page and additional page references are taken in a batch instead of just one at a time. Internal i.e 'pgcache->ref_count' and page's i.e 'page->_refcount' counters are compared to check page's recyclability. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Support for XDP header adjustmentSunil Goutham2-17/+55
When in XDP mode reserve XDP_PACKET_HEADROOM bytes at the start of receive buffer for XDP program to modify headers and adjust packet start. Additional code changes done to handle such packets. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Add support for XDP_TXSunil Goutham3-27/+160
Adds support for XDP_TX i.e transmits packet out of the XDP TX queue mapped to the corresponding Rx queue on which packet is received. Since SQ for XDP TX will be used only on a single cpu i.e SQ description creation and freeing, using atomic free count is not necessary and will become a bottleneck. Hence added a separate 'xdp_free_cnt' used for SQs designated for XDP to track descriptor free count. Changes also include - A new entry 'xdp_page' is added to save transmitted packet's page pointer for later cleanup. - XDP Tx SQ's doorbell is ringed once per NAPI instance. - Retrieving designated SQ for packets being sent out by stack via 'nicvf_xmit'. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Add support for XDP_DROPSunil Goutham3-25/+79
Adds support for XDP_DROP. Also since in XDP mode there is just a single buffer per page, made changes to recycle DMA mapping info as well along with pages. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Add basic XDP supportSunil Goutham5-19/+199
Adds basic XDP support i.e attaching a BPF program to an interface. Also takes care of allocating separate Tx queues for XDP path and for network stack packet transmission. This patch doesn't support handling of any of the XDP actions, all are treated as XDP_PASS i.e packets will be handed over to the network stack. Changes also involve allocating one receive buffer per page in XDP mode and multiple in normal mode i.e when no BPF program is attached. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Cleanup receive buffer allocationSunil Goutham1-9/+9
Get rid of unnecessary double pointer references and type casting in receive buffer allocation code. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Optimize CQE_TX handlingSunil Goutham2-28/+21
Optimized CQE handling with below changes - Feeing descriptors back to SQ in bulk i.e once per NAPI instance instead for every CQE_TX, this will reduce number of atomic updates to 'sq->free_cnt'. - Checking errors in CQE_TX and CQE_RX before calling appropriate fn()s to update error stats i.e reduce branching. Also removed debug messages in packet handling path which otherwise causes issues if DEBUG is enabled. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Optimize RBDR descriptor handlingSunil Goutham2-13/+5
Receive buffer's physical address or iova will anyway not go beyond 49bits, since it is the max supported HW address. As per perf, updating bitfields i.e buf_addr:42 in RBDR descriptor entry consumes lots of cpu cycles, hence changed it to a 64bit field with alignment requirements taken care of. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: thunderx: Support for page recyclingSunil Goutham4-20/+119
Adds support for page recycling for allocating receive buffers to reduce cost of refilling RBDR ring. Also got rid of using compound pages when pagesize is 4K, only order-0 pages now. Only page is recycled, DMA mappings still needs to be done for every receive buffer allocated due to following constraints - Cannot have just one receive buffer per 64KB page. - There is just one buffer ring shared across 8 Rx queues, so buffers of same page can go to any Rx queue. - HW gives buffer address where packet has been DMA'ed and not the index into buffer ring. This makes it not possible to resue DMA mapping info. So unfortunately have to go through costly mapping route for every buffer. Signed-off-by: Sunil Goutham <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02ipx: call ipxitf_put() in ioctl error pathDan Carpenter1-3/+2
We should call ipxitf_put() if the copy_to_user() fails. Reported-by: 李强 <[email protected]> Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: sched: add helpers to handle extended actionsJiri Pirko2-2/+15
Jump is now the only one using value action opcode. This is going to change soon. So introduce helpers to work with this. Convert TC_ACT_JUMP. This also fixes the TC_ACT_JUMP check, which is incorrectly done as a bit check, not a value check. Fixes: e0ee84ded796 ("net sched actions: Complete the JUMPX opcode") Signed-off-by: Jiri Pirko <[email protected]> Acked-by: Jamal Hadi Salim <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02Merge branch 'qed-PTP-fixes'David S. Miller4-45/+105
Sudarsana Reddy Kalluru says: ==================== qed*: PTP bug fixes. The series addresses couple of issues in the PTP implementation. ==================== Signed-off-by: David S. Miller <[email protected]>
2017-05-02qed*: Fix issues in the ptp filter config implementation.[email protected]3-43/+98
PTP hardware filter configuration performed by the driver for a given user requested config is not correct for some of the PTP modes. Following changes are needed for PTP config-filter implementation. 1. NIG_REG_TX_PTP_EN register - Bits 0/1/2 respectively enables TimeSync/"V1 frame format support"/"V2 frame format support" on the TX side. Set the associated bits based on the user request. 2. ptp4l application fails to operate in Peer Delay mode. Following changes are needed to fix this, a. Driver should enable (set to 0) DA #1-related bits for IPv4, IPv6 and MAC destination addresses in these registers: NIG_REG_TX_LLH_PTP_RULE_MASK NIG_REG_LLH_PTP_RULE_MASK b. NIG_REG_LLH_PTP_PARAM_MASK/NIG_REG_TX_LLH_PTP_PARAM_MASK should be set to 0x0 in all modes. Signed-off-by: Sudarsana Reddy Kalluru <[email protected]> Signed-off-by: Yuval Mintz <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02qede: Fix concurrency issue in PTP Tx path processing.[email protected]2-2/+7
PTP Tx timestamping data structures are not protected against the concurrent access in the Tx paths. Protecting the same using atomic bit locks. Signed-off-by: Sudarsana Reddy Kalluru <[email protected]> Signed-off-by: Yuval Mintz <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02stmmac: Add support for SIMATIC IOT2000 platformJan Kiszka1-1/+25
The IOT2000 is industrial controller platform, derived from the Intel Galileo Gen2 board. The variant IOT2020 comes with one LAN port, the IOT2040 has two of them. They can be told apart based on the board asset tag in the DMI table. Based on patch by Sascha Weisenberger. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Sascha Weisenberger <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02net: hns: fix ethtool_get_strings overflow in hns driverTimmy Li4-4/+4
hns_get_sset_count() returns HNS_NET_STATS_CNT and the data space allocated is not enough for ethtool_get_strings(), which will cause random memory corruption. When SLAB and DEBUG_SLAB are both enabled, memory corruptions like the the following can be observed without this patch: [ 43.115200] Slab corruption (Not tainted): Acpi-ParseExt start=ffff801fb0b69030, len=80 [ 43.115206] Redzone: 0x9f911029d006462/0x5f78745f31657070. [ 43.115208] Last user: [<5f7272655f746b70>](0x5f7272655f746b70) [ 43.115214] 010: 70 70 65 31 5f 74 78 5f 70 6b 74 00 6b 6b 6b 6b ppe1_tx_pkt.kkkk [ 43.115217] 030: 70 70 65 31 5f 74 78 5f 70 6b 74 5f 6f 6b 00 6b ppe1_tx_pkt_ok.k [ 43.115218] Next obj: start=ffff801fb0b69098, len=80 [ 43.115220] Redzone: 0x706d655f6f666966/0x9f911029d74e35b. [ 43.115229] Last user: [<ffff0000084b11b0>](acpi_os_release_object+0x28/0x38) [ 43.115231] 000: 74 79 00 6b 6b 6b 6b 6b 70 70 65 31 5f 74 78 5f ty.kkkkkppe1_tx_ [ 43.115232] 010: 70 6b 74 5f 65 72 72 5f 63 73 75 6d 5f 66 61 69 pkt_err_csum_fai Signed-off-by: Timmy Li <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02tcp: fix wraparound issue in tcp_lpEric Dumazet1-2/+4
Be careful when comparing tcp_time_stamp to some u32 quantity, otherwise result can be surprising. Fixes: 7c106d7e782b ("[TCP]: TCP Low Priority congestion control") Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02bpf, arm64: fix jit branch offset related to ldimm64Daniel Borkmann2-4/+49
When the instruction right before the branch destination is a 64 bit load immediate, we currently calculate the wrong jump offset in the ctx->offset[] array as we only account one instruction slot for the 64 bit load immediate although it uses two BPF instructions. Fix it up by setting the offset into the right slot after we incremented the index. Before (ldimm64 test 1): [...] 00000020: 52800007 mov w7, #0x0 // #0 00000024: d2800060 mov x0, #0x3 // #3 00000028: d2800041 mov x1, #0x2 // #2 0000002c: eb01001f cmp x0, x1 00000030: 54ffff82 b.cs 0x00000020 00000034: d29fffe7 mov x7, #0xffff // #65535 00000038: f2bfffe7 movk x7, #0xffff, lsl #16 0000003c: f2dfffe7 movk x7, #0xffff, lsl #32 00000040: f2ffffe7 movk x7, #0xffff, lsl #48 00000044: d29dddc7 mov x7, #0xeeee // #61166 00000048: f2bdddc7 movk x7, #0xeeee, lsl #16 0000004c: f2ddddc7 movk x7, #0xeeee, lsl #32 00000050: f2fdddc7 movk x7, #0xeeee, lsl #48 [...] After (ldimm64 test 1): [...] 00000020: 52800007 mov w7, #0x0 // #0 00000024: d2800060 mov x0, #0x3 // #3 00000028: d2800041 mov x1, #0x2 // #2 0000002c: eb01001f cmp x0, x1 00000030: 540000a2 b.cs 0x00000044 00000034: d29fffe7 mov x7, #0xffff // #65535 00000038: f2bfffe7 movk x7, #0xffff, lsl #16 0000003c: f2dfffe7 movk x7, #0xffff, lsl #32 00000040: f2ffffe7 movk x7, #0xffff, lsl #48 00000044: d29dddc7 mov x7, #0xeeee // #61166 00000048: f2bdddc7 movk x7, #0xeeee, lsl #16 0000004c: f2ddddc7 movk x7, #0xeeee, lsl #32 00000050: f2fdddc7 movk x7, #0xeeee, lsl #48 [...] Also, add a couple of test cases to make sure JITs pass this test. Tested on Cavium ThunderX ARMv8. The added test cases all pass after the fix. Fixes: 8eee539ddea0 ("arm64: bpf: fix out-of-bounds read in bpf2a64_offset()") Reported-by: David S. Miller <[email protected]> Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Alexei Starovoitov <[email protected]> Cc: Xi Wang <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02bpf, arm64: implement jiting of BPF_XADDDaniel Borkmann5-5/+271
This work adds BPF_XADD for BPF_W/BPF_DW to the arm64 JIT and therefore completes JITing of all BPF instructions, meaning we can thus also remove the 'notyet' label and do not need to fall back to the interpreter when BPF_XADD is used in a program! This now also brings arm64 JIT in line with x86_64, s390x, ppc64, sparc64, where all current eBPF features are supported. BPF_W example from test_bpf: .u.insns_int = { BPF_ALU32_IMM(BPF_MOV, R0, 0x12), BPF_ST_MEM(BPF_W, R10, -40, 0x10), BPF_STX_XADD(BPF_W, R10, R0, -40), BPF_LDX_MEM(BPF_W, R0, R10, -40), BPF_EXIT_INSN(), }, [...] 00000020: 52800247 mov w7, #0x12 // #18 00000024: 928004eb mov x11, #0xffffffffffffffd8 // #-40 00000028: d280020a mov x10, #0x10 // #16 0000002c: b82b6b2a str w10, [x25,x11] // start of xadd mapping: 00000030: 928004ea mov x10, #0xffffffffffffffd8 // #-40 00000034: 8b19014a add x10, x10, x25 00000038: f9800151 prfm pstl1strm, [x10] 0000003c: 885f7d4b ldxr w11, [x10] 00000040: 0b07016b add w11, w11, w7 00000044: 880b7d4b stxr w11, w11, [x10] 00000048: 35ffffab cbnz w11, 0x0000003c // end of xadd mapping: [...] BPF_DW example from test_bpf: .u.insns_int = { BPF_ALU32_IMM(BPF_MOV, R0, 0x12), BPF_ST_MEM(BPF_DW, R10, -40, 0x10), BPF_STX_XADD(BPF_DW, R10, R0, -40), BPF_LDX_MEM(BPF_DW, R0, R10, -40), BPF_EXIT_INSN(), }, [...] 00000020: 52800247 mov w7, #0x12 // #18 00000024: 928004eb mov x11, #0xffffffffffffffd8 // #-40 00000028: d280020a mov x10, #0x10 // #16 0000002c: f82b6b2a str x10, [x25,x11] // start of xadd mapping: 00000030: 928004ea mov x10, #0xffffffffffffffd8 // #-40 00000034: 8b19014a add x10, x10, x25 00000038: f9800151 prfm pstl1strm, [x10] 0000003c: c85f7d4b ldxr x11, [x10] 00000040: 8b07016b add x11, x11, x7 00000044: c80b7d4b stxr w11, x11, [x10] 00000048: 35ffffab cbnz w11, 0x0000003c // end of xadd mapping: [...] Tested on Cavium ThunderX ARMv8, test suite results after the patch: No JIT: [ 3751.855362] test_bpf: Summary: 311 PASSED, 0 FAILED, [0/303 JIT'ed] With JIT: [ 3573.759527] test_bpf: Summary: 311 PASSED, 0 FAILED, [303/303 JIT'ed] Signed-off-by: Daniel Borkmann <[email protected]> Acked-by: Alexei Starovoitov <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-05-02Merge branch 'work.compat' of ↵Linus Torvalds18-1267/+1139
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull fs/compat.c cleanups from Al Viro: "More moving of compat syscalls from fs/compat.c to fs/*.c where the native counterparts live. And death to compat_sys_getdents64() - the only architecture that used to need it was ia64, and _that_ has lost biarch support quite a few years ago" * 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs/compat.c: trim unused includes move compat_rw_copy_check_uvector() over to fs/read_write.c fhandle: move compat syscalls from compat.c open: move compat syscalls from compat.c stat: move compat syscalls from compat.c fcntl: move compat syscalls from compat.c readdir: move compat syscalls from compat.c statfs: move compat syscalls from compat.c utimes: move compat syscalls from compat.c move compat select-related syscalls to fs/select.c Remove compat_sys_getdents64()
2017-05-02Merge branch 'work.splice' of ↵Linus Torvalds5-15/+13
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull splice updates from Al Viro: "These actually missed the last cycle; the branch itself is from last December" * 'work.splice' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: make nr_pages calculation in default_file_splice_read() a bit less ugly splice/tee/vmsplice: validate flags splice_pipe_desc: kill ->flags remove spd_release_page()
2017-05-02Merge branch 'work.iov_iter' of ↵Linus Torvalds8-27/+21
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull iov_iter updates from Al Viro: "Cleanups that sat in -next + -stable fodder that has just missed 4.11. There's more iov_iter work in my local tree, but I'd prefer to push the stuff that had been in -next first" * 'work.iov_iter' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: iov_iter: don't revert iov buffer if csum error generic_file_read_iter(): make use of iov_iter_revert() generic_file_direct_write(): make use of iov_iter_revert() orangefs: use iov_iter_revert() sctp: switch to copy_from_iter_full() net/9p: switch to copy_from_iter_full() switch memcpy_from_msg() to copy_from_iter_full() rds: make use of iov_iter_revert()
2017-05-02Merge branch 'for-next' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds5-53/+40
Pull CIFS fixes from Steve French: "Three cifs/smb3 fixes - including two for stable" * 'for-next' of git://git.samba.org/sfrench/cifs-2.6: cifs: don't check for failure from mempool_alloc() Do not return number of bytes written for ioctl CIFS_IOC_COPYCHUNK_FILE Fix match_prepath()
2017-05-02Merge tag 'usercopy-v4.12-rc1' of ↵Linus Torvalds3-24/+20
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardened usercopy updates from Kees Cook: "A couple hardened usercopy changes: - drop now unneeded is_vmalloc_or_module() check (Laura Abbott) - use enum instead of literals for stack frame API (Sahara)" * tag 'usercopy-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: mm/usercopy: Drop extra is_vmalloc_or_module() check usercopy: Move enum for arch_within_stack_frames()
2017-05-02Merge tag 'pstore-v4.12-rc1' of ↵Linus Torvalds11-461/+607
git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull pstore updates from Kees Cook: "This has a large internal refactoring along with several smaller fixes. - constify compression structures; Bhumika Goyal - restore powerpc dumping; Ankit Kumar - fix more bugs in the rarely exercises module unloading logic - reorganize filesystem locking to fix problems noticed by lockdep - refactor internal pstore APIs to make development and review easier: - improve error reporting - add kernel-doc structure and function comments - avoid insane argument passing by using a common record structure" * tag 'pstore-v4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (23 commits) pstore: Solve lockdep warning by moving inode locks pstore: Fix flags to enable dumps on powerpc pstore: Remove unused vmalloc.h in pmsg pstore: simplify write_user_compat() pstore: Remove write_buf() callback pstore: Replace arguments for write_buf_user() API pstore: Replace arguments for write_buf() API pstore: Replace arguments for erase() API pstore: Do not duplicate record metadata pstore: Allocate records on heap instead of stack pstore: Pass record contents instead of copying pstore: Always allocate buffer for decompression pstore: Replace arguments for write() API pstore: Replace arguments for read() API pstore: Switch pstore_mkfile to pass record pstore: Move record decompression to function pstore: Extract common arguments into structure pstore: Add kernel-doc for struct pstore_info pstore: Improve register_pstore() error reporting pstore: Avoid race in module unloading ...
2017-05-02block: don't call blk_mq_quiesce_queue() after queue is frozenMing Lei2-5/+0
After queue is frozen, no request in this queue can be in use at all, so there can't be any .queue_rq() running on this queue. It isn't necessary to call blk_mq_quiesce_queue() any more, so remove it in both elevator_switch_mq() and blk_mq_update_nr_requests(). Cc: Bart Van Assche <[email protected]> Signed-off-by: Ming Lei <[email protected]> Fixed up the description a bit. Signed-off-by: Jens Axboe <[email protected]>
2017-05-02Merge tag 'docs-4.12' of git://git.lwn.net/linuxLinus Torvalds132-5417/+6111
Pull documentation update from Jonathan Corbet: "A reasonably busy cycle for documentation this time around. There is a new guide for user-space API documents, rather sparsely populated at the moment, but it's a start. Markus improved the infrastructure for converting diagrams. Mauro has converted much of the USB documentation over to RST. Plus the usual set of fixes, improvements, and tweaks. There's a bit more than the usual amount of reaching out of Documentation/ to fix comments elsewhere in the tree; I have acks for those where I could get them" * tag 'docs-4.12' of git://git.lwn.net/linux: (74 commits) docs: Fix a couple typos docs: Fix a spelling error in vfio-mediated-device.txt docs: Fix a spelling error in ioctl-number.txt MAINTAINERS: update file entry for HSI subsystem Documentation: allow installing man pages to a user defined directory Doc/PM: Sync with intel_powerclamp code behavior zr364xx.rst: usb/devices is now at /sys/kernel/debug/ usb.rst: move documentation from proc_usb_info.txt to USB ReST book convert philips.txt to ReST and add to media docs docs-rst: usb: update old usbfs-related documentation arm: Documentation: update a path name docs: process/4.Coding.rst: Fix a couple of document refs docs-rst: fix usb cross-references usb: gadget.h: be consistent at kernel doc macros usb: composite.h: fix two warnings when building docs usb: get rid of some ReST doc build errors usb.rst: get rid of some Sphinx errors usb/URB.txt: convert to ReST and update it usb/persist.txt: convert to ReST and add to driver-api book usb/hotplug.txt: convert to ReST and add to driver-api book ...
2017-05-02Merge tag 'm68k-for-v4.12-tag1' of ↵Linus Torvalds5-362/+278
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven: - more kernel message modernizations and cleanups - Mac and Nubus improvements and cleanups. * tag 'm68k-for-v4.12-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: nubus: Add MVC and VSC video card definitions nubus: Clean up whitespace nubus: Clean up printk calls nubus: Fix nubus_rewinddir m68k/mac: Clarify IOP message alloc/free confusion m68k/mac: Adopt platform_device_register_simple() m68k/mac: Modernize printing of kernel messages m68k/mac: IOP - Modernize printing of kernel messages
2017-05-02Merge branch 'for-linus' of ↵Linus Torvalds115-561/+4223
git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Martin Schwidefsky: - three merges for KVM/s390 with changes for vfio-ccw and cpacf. The patches are included in the KVM tree as well, let git sort it out. - add the new 'trng' random number generator - provide the secure key verification API for the pkey interface - introduce the z13 cpu counters to perf - add a new system call to set up the guarded storage facility - simplify TASK_SIZE and arch_get_unmapped_area - export the raw STSI data related to CPU topology to user space - ... and the usual churn of bug-fixes and cleanups. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (74 commits) s390/crypt: use the correct module alias for paes_s390. s390/cpacf: Introduce kma instruction s390/cpacf: query instructions use unique parameters for compatibility with KMA s390/trng: Introduce s390 TRNG device driver. s390/crypto: Provide s390 specific arch random functionality. s390/crypto: Add new subfunctions to the cpacf PRNO function. s390/crypto: Renaming PPNO to PRNO. s390/pageattr: avoid unnecessary page table splitting s390/mm: simplify arch_get_unmapped_area[_topdown] s390/mm: make TASK_SIZE independent from the number of page table levels s390/gs: add regset for the guarded storage broadcast control block s390/kvm: Add use_cmma field to mm_context_t s390/kvm: Add PGSTE manipulation functions vfio: ccw: improve error handling for vfio_ccw_mdev_remove vfio: ccw: remove unnecessary NULL checks of a pointer s390/spinlock: remove compare and delay instruction s390/spinlock: use atomic primitives for spinlocks s390/cpumf: simplify detection of guest samples s390/pci: remove forward declaration s390/pci: increase the PCI_NR_FUNCTIONS default ...
2017-05-02Merge branch 'next' into for-linusDmitry Torokhov12531-235359/+534182
Prepare input updates for 4.12 merge window.
2017-05-02selftests: watchdog: accept multiple params on command lineTimur Tabi1-27/+34
Watchdog drivers are not required to retain programming information, such as timeouts, after the watchdog device is closed. Therefore, the watchdog test should be able to perform multiple actions after opening the watchdog device. For example, to set the timeout to 10s and ping every 5s: watchdog-test -t 10 -p 5 -e Also, display the periodic decimal point only if the keep-alive call succeeds. Signed-off-by: Timur Tabi <[email protected]> Reviewed-by: Guenter Roeck <[email protected]> Signed-off-by: Shuah Khan <[email protected]>
2017-05-02rcu: Open-code the rcu_cblist_n_lazy_cbs() functionPaul E. McKenney4-9/+3
Because the rcu_cblist_n_lazy_cbs() just samples the ->len_lazy counter, and because the rcu_cblist structure is quite straightforward, it makes sense to open-code rcu_cblist_n_lazy_cbs(p) as p->len_lazy, cutting out a level of indirection. This commit makes this change. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Linus Torvalds <[email protected]>
2017-05-02rcu: Open-code the rcu_cblist_n_cbs() functionPaul E. McKenney4-13/+6
Because the rcu_cblist_n_cbs() just samples the ->len counter, and because the rcu_cblist structure is quite straightforward, it makes sense to open-code rcu_cblist_n_cbs(p) as p->len, cutting out a level of indirection. This commit makes this change. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Linus Torvalds <[email protected]>
2017-05-02Merge branch 'bpf-test-prog-fixes'David S. Miller1-9/+10
I say: ==================== Fix some bpf program testing framework bugs This series fixes two issue: 1) Accidental user pointer dereference in bpf_test_finish() 2) The packet data given to the test programs is not aligned correctly The first issue is fixed simply because we have a kernel side copy of the datastructure in question already. And the second bug is a simple matter of applying NET_IP_ALIGN where needed. ==================== Signed-off-by: David S. Miller <[email protected]>
2017-05-02bpf: Align packet data properly in program testing framework.David Miller1-5/+5
Make sure we apply NET_IP_ALIGN when reserving headroom for SKB and XDP test runs, just like a real driver would. Signed-off-by: David S. Miller <[email protected]> Acked-by: Daniel Borkmann <[email protected]>
2017-05-02bpf: Do not dereference user pointer in bpf_test_finish().David Miller1-4/+5
Instead, pass the kattr in which has a kernel side copy of this data structure from userspace already. Fix based upon a suggestion from Alexei Starovoitov. Signed-off-by: David S. Miller <[email protected]> Acked-by: Daniel Borkmann <[email protected]>
2017-05-02rcu: Open-code the rcu_cblist_empty() functionPaul E. McKenney3-14/+7
Because the rcu_cblist_empty() just samples the ->head pointer, and because the rcu_cblist structure is quite straightforward, it makes sense to open-code rcu_cblist_empty(p) as !p->head, cutting out a level of indirection. This commit makes this change. Reported-by: Ingo Molnar <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Linus Torvalds <[email protected]>
2017-05-02selftests: bpf: Use bpf_endian.h in test_xdp.cDavid S. Miller1-9/+8
This fixes the testcase on big-endian. Signed-off-by: David S. Miller <[email protected]>
2017-05-02infiniband: avoid dereferencing uninitialized dst on error pathPaolo Abeni1-1/+1
With commit eea40b8f624f ("infiniband: call ipv6 route lookup via the stub interface"), if the route lookup fails due to ipv6 being disabled, the dst variable is left untouched, and the following dst_release() may access uninitialized memory. Since ipv6_dst_lookup() always sets dst to NULL in case of lookup failure with ipv6 enabled, fix the above just returning the error code if the lookup fails. Fixes: eea40b8f624 ("infiniband: call ipv6 route lookup via the stub interface") Reported-by: Sabrina Dubroca <[email protected]> Signed-off-by: Paolo Abeni <[email protected]> Reviewed-by: Sabrina Dubroca <[email protected]> Signed-off-by: Doug Ledford <[email protected]>
2017-05-02rcu: Separately compile large rcu_segcblist functionsPaul E. McKenney4-498/+544
This commit creates a new kernel/rcu/rcu_segcblist.c file that contains non-trivial segcblist functions. Trivial functions remain as static inline functions in kernel/rcu/rcu_segcblist.h Reported-by: Linus Torvalds <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Thomas Gleixner <[email protected]>
2017-05-02audit: fix the RCU locking for the auditd_connection structurePaul Moore1-57/+100
Cong Wang correctly pointed out that the RCU read locking of the auditd_connection struct was wrong, this patch correct this by adopting a more traditional, and correct RCU locking model. This patch is heavily based on an earlier prototype by Cong Wang. Cc: <[email protected]> # 4.11.x- Reported-by: Cong Wang <[email protected]> Signed-off-by: Cong Wang <[email protected]> Signed-off-by: Paul Moore <[email protected]>
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