The patch titled
Subject: mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix
has been added to the -mm tree. Its filename is
mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix.patch
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------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix
tweak comment
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Cc: Yang Shi <yang.shi@xxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/mm/mmap.c~mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix
+++ a/mm/mmap.c
@@ -243,9 +243,9 @@ SYSCALL_DEFINE1(brk, unsigned long, brk)
*/
if (brk <= mm->brk) {
/*
- * mm->brk need to be protected by write mmap_sem, update it
- * before downgrading mmap_sem.
- * When __do_munmap fail, it will be restored from origbrk.
+ * mm->brk must to be protected by write mmap_sem so update it
+ * before downgrading mmap_sem. When __do_munmap() fails,
+ * mm->brk will be restored from origbrk.
*/
mm->brk = brk;
retval = __do_munmap(mm, newbrk, oldbrk-newbrk, &uf, true);
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
fix-crash-on-ocfs2_duplicate_clusters_by_page-v5-checkpatch-fixes.patch
arm-arch-arm-include-asm-pageh-needs-personalityh.patch
fix-clusters-leak-in-ocfs2_defrag_extent-fix.patch
mm.patch
mmpage_alloc-pf_wq_worker-threads-must-sleep-at-should_reclaim_retry-fix.patch
sched-loadavg-consolidate-load_int-load_frac-calc_load-fix.patch
mm-mremap-downgrade-mmap_sem-to-read-when-shrinking-fix.patch
mm-brk-downgrade-mmap_sem-to-read-when-shrinking-fix.patch
mm-calculate-deferred-pages-after-skipping-mirrored-memory-fix.patch
list_lru-prefetch-neighboring-list-entries-before-acquiring-lock-fix.patch
lib-bitmapc-fix-remaining-space-computation-in-bitmap_print_to_pagebuf-fix.patch
lib-bitmapc-fix-remaining-space-computation-in-bitmap_print_to_pagebuf-fix-fix.patch
ipc-allow-boot-time-extension-of-ipcmni-from-32k-to-8m-checkpatch-fixes.patch
linux-next-rejects.patch
kernel-forkc-export-kernel_thread-to-modules.patch
slab-leaks3-default-y.patch
