The patch titled
Subject: mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix-fix
has been added to the -mm tree. Its filename is
mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix-fix
small optimisation. might fix bogus used-uninitialised warnings
Cc: Andrea Arcangeli <andrea@xxxxxxxxxxxx>
Cc: Avi Kivity <avi@xxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>
Cc: Haggai Eran <haggaie@xxxxxxxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Liran Liss <liranl@xxxxxxxxxxxx>
Cc: Or Gerlitz <ogerlitz@xxxxxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Cc: Shachar Raindel <raindel@xxxxxxxxxxxx>
Cc: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/memory.c~mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix-fix mm/memory.c
--- a/mm/memory.c~mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix-fix
+++ a/mm/memory.c
@@ -1041,6 +1041,7 @@ int copy_page_range(struct mm_struct *ds
unsigned long end = vma->vm_end;
unsigned long mmun_start; /* For mmu_notifiers */
unsigned long mmun_end; /* For mmu_notifiers */
+ bool is_cow;
int ret;
/*
@@ -1074,7 +1075,8 @@ int copy_page_range(struct mm_struct *ds
* parent mm. And a permission downgrade will only happen if
* is_cow_mapping() returns true.
*/
- if (is_cow_mapping(vma->vm_flags)) {
+ is_cow = is_cow_mapping(vma->vm_flags);
+ if (is_cow) {
mmun_start = addr;
mmun_end = end;
mmu_notifier_invalidate_range_start(src_mm, mmun_start,
@@ -1095,7 +1097,7 @@ int copy_page_range(struct mm_struct *ds
}
} while (dst_pgd++, src_pgd++, addr = next, addr != end);
- if (is_cow_mapping(vma->vm_flags))
+ if (is_cow)
mmu_notifier_invalidate_range_end(src_mm, mmun_start, mmun_end);
return ret;
}
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
arch-x86-platform-iris-irisc-register-a-platform-device-and-a-platform-driver.patch
audith-replace-defines-with-c-stubs.patch
thermal-add-generic-cpufreq-cooling-implementation.patch
thermal-exynos5-add-exynos5-thermal-sensor-driver-support.patch
thermal-exynos-register-the-tmu-sensor-with-the-kernel-thermal-layer.patch
mm.patch
x86-pat-separate-the-pfn-attribute-tracking-for-remap_pfn_range-and-vm_insert_pfn-fix.patch
mm-kill-vma-flag-vm_reserved-and-mm-reserved_vm-counter-fix.patch
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix.patch
mm-fix-nonuniform-page-status-when-writing-new-file-with-small-buffer-fix-fix.patch
mm-vmscan-scale-number-of-pages-reclaimed-by-reclaim-compaction-based-on-failures-fix.patch
mm-mmu_notifier-fix-inconsistent-memory-between-secondary-mmu-and-host-fix.patch
rbtree-performance-and-correctness-test-fix.patch
mm-support-migrate_discard-fix.patch
mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix.patch
mm-move-all-mmu-notifier-invocations-to-be-done-outside-the-pt-lock-fix-fix.patch
memory-hotplug-fix-pages-missed-by-race-rather-than-failng-fix.patch
backlight-add-backlight-driver-for-lm3630-chip-fix.patch
backlight-add-new-lm3639-backlight-driver-fix.patch
lib-parserc-avoid-overflow-in-match_number-fix.patch
drivers-firmware-dmi_scanc-check-dmi-version-when-get-system-uuid-fix.patch
drivers-firmware-dmi_scanc-fetch-dmi-version-from-smbios-if-it-exists-checkpatch-fixes.patch
rtc-add-dallas-ds2404-driver-fix.patch
rtc-snvs-add-freescale-rtc-snvs-driver-fix.patch
fs-fat-fix-all-other-checkpatch-issues-in-dirc-fix.patch
fat-simplify-writeback_inode-checkpatch-fixes.patch
fat-simplify-writeback_inode-checkpatch-fixes-fix.patch
proc-use-kzalloc-instead-of-kmalloc-and-memset-fix.patch
journal_add_journal_head-debug.patch
mutex-subsystem-synchro-test-module-fix.patch
slab-leaks3-default-y.patch
put_bh-debug.patch
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