lwn.git/mm, branch 4.8-fixes

mm: make __swap_writepage() use bio_set_op_attrs()

2016-08-07T20:41:02+00:00

Cleaner than manipulating bio->bi_rw flags directly. Signed-off-by: Jens Axboe

block/mm: make bdev_ops->rw_page() take a bool for read/write

2016-08-07T20:41:02+00:00

Commit abf545484d31 changed it from an 'rw' flags type to the newer ops based interface, but now we're effectively leaking some bdev internals to the rest of the kernel. Since we only care about whether it's a read or a write at that level, just pass in a bool 'is_write' parameter instead. Then we can also move op_is_write() and friends back under CONFIG_BLOCK protection. Reviewed-by: Mike Christie Signed-off-by: Jens Axboe

Merge branch 'for-linus' of git://git.kernel.dk/linux-block

2016-08-06T03:31:51+00:00

Pull block fixes from Jens Axboe: "Here's the second round of block updates for this merge window. It's a mix of fixes for changes that went in previously in this round, and fixes in general. This pull request contains: - Fixes for loop from Christoph - A bdi vs gendisk lifetime fix from Dan, worth two cookies. - A blk-mq timeout fix, when on frozen queues. From Gabriel. - Writeback fix from Jan, ensuring that __writeback_single_inode() does the right thing. - Fix for bio->bi_rw usage in f2fs from me. - Error path deadlock fix in blk-mq sysfs registration from me. - Floppy O_ACCMODE fix from Jiri. - Fix to the new bio op methods from Mike. One more followup will be coming here, ensuring that we don't propagate the block types outside of block. That, and a rename of bio->bi_rw is coming right after -rc1 is cut. - Various little fixes" * 'for-linus' of git://git.kernel.dk/linux-block: mm/block: convert rw_page users to bio op use loop: make do_req_filebacked more robust loop: don't try to use AIO for discards blk-mq: fix deadlock in blk_mq_register_disk() error path Include: blkdev: Removed duplicate 'struct request;' declaration. Fixup direct bi_rw modifiers block: fix bdi vs gendisk lifetime mismatch blk-mq: Allow timeouts to run while queue is freezing nbd: fix race in ioctl block: fix use-after-free in seq file f2fs: drop bio->bi_rw manual assignment block: add missing group association in bio-cloning functions blkcg: kill unused field nr_undestroyed_grps writeback: Write dirty times for WB_SYNC_ALL writeback floppy: fix open(O_ACCMODE) for ioctl-only open

Merge tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2016-08-05T13:00:54+00:00

Pull more powerpc updates from Michael Ellerman: "These were delayed for various reasons, so I let them sit in next a bit longer, rather than including them in my first pull request. Fixes: - Fix early access to cpu_spec relocation from Benjamin Herrenschmidt - Fix incorrect event codes in power9-event-list from Madhavan Srinivasan - Move register_process_table() out of ppc_md from Michael Ellerman Use jump_label use for [cpu|mmu]_has_feature(): - Add mmu_early_init_devtree() from Michael Ellerman - Move disable_radix handling into mmu_early_init_devtree() from Michael Ellerman - Do hash device tree scanning earlier from Michael Ellerman - Do radix device tree scanning earlier from Michael Ellerman - Do feature patching before MMU init from Michael Ellerman - Check features don't change after patching from Michael Ellerman - Make MMU_FTR_RADIX a MMU family feature from Aneesh Kumar K.V - Convert mmu_has_feature() to returning bool from Michael Ellerman - Convert cpu_has_feature() to returning bool from Michael Ellerman - Define radix_enabled() in one place & use static inline from Michael Ellerman - Add early_[cpu|mmu]_has_feature() from Michael Ellerman - Convert early cpu/mmu feature check to use the new helpers from Aneesh Kumar K.V - jump_label: Make it possible for arches to invoke jump_label_init() earlier from Kevin Hao - Call jump_label_init() in apply_feature_fixups() from Aneesh Kumar K.V - Remove mfvtb() from Kevin Hao - Move cpu_has_feature() to a separate file from Kevin Hao - Add kconfig option to use jump labels for cpu/mmu_has_feature() from Michael Ellerman - Add option to use jump label for cpu_has_feature() from Kevin Hao - Add option to use jump label for mmu_has_feature() from Kevin Hao - Catch usage of cpu/mmu_has_feature() before jump label init from Aneesh Kumar K.V - Annotate jump label assembly from Michael Ellerman TLB flush enhancements from Aneesh Kumar K.V: - radix: Implement tlb mmu gather flush efficiently - Add helper for finding SLBE LLP encoding - Use hugetlb flush functions - Drop multiple definition of mm_is_core_local - radix: Add tlb flush of THP ptes - radix: Rename function and drop unused arg - radix/hugetlb: Add helper for finding page size - hugetlb: Add flush_hugetlb_tlb_range - remove flush_tlb_page_nohash Add new ptrace regsets from Anshuman Khandual and Simon Guo: - elf: Add powerpc specific core note sections - Add the function flush_tmregs_to_thread - Enable in transaction NT_PRFPREG ptrace requests - Enable in transaction NT_PPC_VMX ptrace requests - Enable in transaction NT_PPC_VSX ptrace requests - Adapt gpr32_get, gpr32_set functions for transaction - Enable support for NT_PPC_CGPR - Enable support for NT_PPC_CFPR - Enable support for NT_PPC_CVMX - Enable support for NT_PPC_CVSX - Enable support for TM SPR state - Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR - Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR - Enable support for EBB registers - Enable support for Performance Monitor registers" * tag 'powerpc-4.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (48 commits) powerpc/mm: Move register_process_table() out of ppc_md powerpc/perf: Fix incorrect event codes in power9-event-list powerpc/32: Fix early access to cpu_spec relocation powerpc/ptrace: Enable support for Performance Monitor registers powerpc/ptrace: Enable support for EBB registers powerpc/ptrace: Enable support for NT_PPPC_TAR, NT_PPC_PPR, NT_PPC_DSCR powerpc/ptrace: Enable NT_PPC_TM_CTAR, NT_PPC_TM_CPPR, NT_PPC_TM_CDSCR powerpc/ptrace: Enable support for TM SPR state powerpc/ptrace: Enable support for NT_PPC_CVSX powerpc/ptrace: Enable support for NT_PPC_CVMX powerpc/ptrace: Enable support for NT_PPC_CFPR powerpc/ptrace: Enable support for NT_PPC_CGPR powerpc/ptrace: Adapt gpr32_get, gpr32_set functions for transaction powerpc/ptrace: Enable in transaction NT_PPC_VSX ptrace requests powerpc/ptrace: Enable in transaction NT_PPC_VMX ptrace requests powerpc/ptrace: Enable in transaction NT_PRFPREG ptrace requests powerpc/process: Add the function flush_tmregs_to_thread elf: Add powerpc specific core note sections powerpc/mm: remove flush_tlb_page_nohash powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range ...

mm/memblock.c: fix NULL dereference error

2016-08-05T00:02:09+00:00

It causes NULL dereference error and failure to get type_a->regions[0] info if parameter type_b of __next_mem_range_rev() == NULL Fix this by checking before dereferring and initializing idx_b to 0 The approach is tested by dumping all types of region via __memblock_dump_all() and __next_mem_range_rev() fixed to UART separately the result is okay after checking the logs. Link: http://lkml.kernel.org/r/57A0320D.6070102@zoho.com Signed-off-by: zijun_hu Tested-by: zijun_hu Acked-by: Tejun Heo Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

slub: drop bogus inline for fixup_red_left()

2016-08-05T00:02:09+00:00

With m68k-linux-gnu-gcc-4.1: include/linux/slub_def.h:126: warning: `fixup_red_left' declared inline after being called include/linux/slub_def.h:126: warning: previous declaration of `fixup_red_left' was here Commit c146a2b98eb5 ("mm, kasan: account for object redzone in SLUB's nearest_obj()") made fixup_red_left() global, but forgot to remove the inline keyword. Fixes: c146a2b98eb5898e ("mm, kasan: account for object redzone in SLUB's nearest_obj()") Link: http://lkml.kernel.org/r/1470256262-1586-1-git-send-email-geert@linux-m68k.org Signed-off-by: Geert Uytterhoeven Cc: Alexander Potapenko Acked-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: initialise per_cpu_nodestats for all online pgdats at boot

2016-08-05T00:02:09+00:00

Paul Mackerras and Reza Arbab reported that machines with memoryless nodes fail when vmstats are refreshed. Paul reported an oops as follows Unable to handle kernel paging request for data at address 0xff7a10000 Faulting instruction address: 0xc000000000270cd0 Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2048 NUMA PowerNV Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.7.0-kvm+ #118 task: c000000ff0680010 task.stack: c000000ff0704000 NIP: c000000000270cd0 LR: c000000000270ce8 CTR: 0000000000000000 REGS: c000000ff0707900 TRAP: 0300 Not tainted (4.7.0-kvm+) MSR: 9000000102009033 CR: 846b6824 XER: 20000000 CFAR: c000000000008768 DAR: 0000000ff7a10000 DSISR: 42000000 SOFTE: 1 NIP refresh_zone_stat_thresholds+0x80/0x240 LR refresh_zone_stat_thresholds+0x98/0x240 Call Trace: refresh_zone_stat_thresholds+0xb8/0x240 (unreliable) Both supplied potential fixes but one potentially misses checks and another had redundant initialisations. This version initialises per_cpu_nodestats on a per-pgdat basis instead of on a per-zone basis. Link: http://lkml.kernel.org/r/20160804092404.GI2799@techsingularity.net Signed-off-by: Mel Gorman Reported-by: Paul Mackerras Reported-by: Reza Arbab Tested-by: Reza Arbab Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/memblock: fix a typo in a comment

2016-08-05T00:02:09+00:00

s/accomodate/accommodate/ Link: http://lkml.kernel.org/r/20160804121824.18100-1-kuleshovmail@gmail.com Signed-off-by: Alexander Kuleshov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm: disable CONFIG_MEMORY_HOTPLUG when KASAN is enabled

2016-08-05T00:02:09+00:00

At present it is obvious that memory online and offline will fail when KASAN is enabled. So add the condition to limit the memory_hotplug when KASAN is enabled. Link: http://lkml.kernel.org/r/1470063651-29519-1-git-send-email-zhongjiang@huawei.com Signed-off-by: zhong jiang Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Dmitry Vyukov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/block: convert rw_page users to bio op use

2016-08-04T20:25:33+00:00

The rw_page users were not converted to use bio/req ops. As a result bdev_write_page is not passing down REQ_OP_WRITE and the IOs will be sent down as reads. Signed-off-by: Mike Christie Fixes: 4e1b2d52a80d ("block, fs, drivers: remove REQ_OP compat defs and related code") Modified by me to: 1) Drop op_flags passing into ->rw_page(), as we don't use it. 2) Make op_is_write() and friends safe to use for !CONFIG_BLOCK Signed-off-by: Jens Axboe