Subject: + mm-remap_file_pages-remove-unneeded-access_once.patch added to -mm tree
To: akpm@xxxxxxxxxxxxxxxxxxxx,dvyukov@xxxxxxxxxx,gorcunov@xxxxxxxxxx,hughd@xxxxxxxxxx,keescook@xxxxxxxxxxxx,pageexec@xxxxxxxxxxx,riel@xxxxxxxxxx,walken@xxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 02 Jan 2014 13:22:45 -0800
The patch titled
Subject: mm: remap_file_pages(): remove unneeded ACCESS_ONCE
has been added to the -mm tree. Its filename is
mm-remap_file_pages-remove-unneeded-access_once.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-remap_file_pages-remove-unneeded-access_once.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-remap_file_pages-remove-unneeded-access_once.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm: remap_file_pages(): remove unneeded ACCESS_ONCE
This was included to make it clear that the memory at *vma is about to be
freed, but the ACCESS_ONCE() isn't actually needed and we have a nice code
comment in there.
Cc: Cyrill Gorcunov <gorcunov@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Michel Lespinasse <walken@xxxxxxxxxx>
Cc: PaX Team <pageexec@xxxxxxxxxxx>
Cc: Rik van Riel <riel@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/fremap.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/fremap.c~mm-remap_file_pages-remove-unneeded-access_once mm/fremap.c
--- a/mm/fremap.c~mm-remap_file_pages-remove-unneeded-access_once
+++ a/mm/fremap.c
@@ -209,7 +209,7 @@ get_write_lock:
unsigned long addr;
struct file *file = get_file(vma->vm_file);
/* mmap_region may free vma; grab the info now */
- vm_flags = ACCESS_ONCE(vma->vm_flags);
+ vm_flags = vma->vm_flags;
addr = mmap_region(file, start, size, vm_flags, pgoff);
fput(file);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
arch-alpha-kernel-systblss-remove-debug-check.patch
i-need-old-gcc.patch
mm-remap_file_pages-remove-unneeded-access_once.patch
dma-debug-enhance-dma_debug_device_change-to-check-for-mapping-errors-fix.patch
input-route-kbd-leds-through-the-generic-leds-layer-fix.patch
drivers-block-ccissc-cciss_init_one-use-proper-errnos.patch
block-blk-mq-cpuc-use-hotcpu_notifier.patch
posix_acl-uninlining.patch
mm.patch
mm-hugetlbfs-move-the-put-get_page-slab-and-hugetlbfs-optimization-in-a-faster-path-fix-2.patch
mm-hugetlbc-simplify-pageheadhuge-and-pagehuge.patch
mm-swapc-reorganize-put_compound_page.patch
mm-get-rid-of-unnecessary-pageblock-scanning-in-setup_zone_migrate_reserve-fix.patch
mm-memory-failure-fix-the-typo-in-me_pagecache_dirty-fix.patch
mm-show_mem-remove-show_mem_filter_page_count-fix.patch
mm-add-overcommit_kbytes-sysctl-variable-checkpatch-fixes.patch
mm-add-overcommit_kbytes-sysctl-variable-fix.patch
mm-add-overcommit_kbytes-sysctl-variable-fix-2.patch
memblock-mem_hotplug-introduce-memblock_hotplug-flag-to-mark-hotpluggable-regions-checkpatch-fixes.patch
acpi-numa-mem_hotplug-mark-hotpluggable-memory-in-memblock-checkpatch-fixes.patch
memblock-mem_hotplug-make-memblock-skip-hotpluggable-regions-if-needed-checkpatch-fixes.patch
mm-memblock-add-memblock-memory-allocation-apis-fix.patch
sched-add-tracepoints-related-to-numa-task-migration-fix.patch
mm-page_alloc-warn-for-non-blockable-__gfp_nofail-allocation-failure.patch
mm-print-more-details-for-bad_page-fix.patch
mm-munlock-fix-potential-race-with-thp-page-split-fix.patch
lib-parserc-put-export_symbols-in-the-conventional-place.patch
drivers-rtc-rtc-cmosc-propagate-hpet_register_irq_handler-failure.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-fix.patch
kmod-run-usermodehelpers-only-on-cpus-allowed-for-kthreadd-v2-checkpatch-fixes.patch
fs-ext3-use-rbtree-postorder-iteration-helper-instead-of-opencoding-fix.patch
ipc-semc-avoid-overflow-of-semop-undo-semadj-value-fix.patch
linux-next.patch
linux-next-git-rejects.patch
debugging-keep-track-of-page-owners.patch
journal_add_journal_head-debug.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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