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authorKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>2011-07-25 17:12:11 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-25 20:57:09 -0700
commitdd78553b5e7a0b34c0b60478d04ee16d8d8f4fa7 (patch)
tree18bdb94761365c248392d29004f68d9181955ead /mm/pagewalk.c
parentc27fe4c8942d3ca715986f79cc26f44608d7d9fb (diff)
downloadlinux-dd78553b5e7a0b34c0b60478d04ee16d8d8f4fa7.tar.gz
pagewalk: fix code comment for THP
Commit bae9c19bf1 ("thp: split_huge_page_mm/vma") changed locking behavior of walk_page_range(). Thus this patch changes the comment too. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Hiroyuki Kamezawa <kamezawa.hiroyuki@gmail.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/pagewalk.c')
-rw-r--r--mm/pagewalk.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/mm/pagewalk.c b/mm/pagewalk.c
index f7929406e77..2f5cf10ff66 100644
--- a/mm/pagewalk.c
+++ b/mm/pagewalk.c
@@ -176,7 +176,8 @@ static int walk_hugetlb_range(struct vm_area_struct *vma,
* associated range, and a copy of the original mm_walk for access to
* the ->private or ->mm fields.
*
- * No locks are taken, but the bottom level iterator will map PTE
+ * Usually no locks are taken, but splitting transparent huge page may
+ * take page table lock. And the bottom level iterator will map PTE
* directories from highmem if necessary.
*
* If any callback returns a non-zero value, the walk is aborted and