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| author | Oleg Nesterov <oleg@redhat.com> | 2014-01-22 03:49:04 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-01-22 04:19:43 +0400 |
| commit | 5eaf1a9e233d61438377f57facb167f8208ba9fd (patch) | |
| tree | c1455aa3d758ea5ebb5879f655b4e7ddf4079d94 /fs | |
| parent | c728852f5dd41ce34e7ce0a179cf28cd5f4dc301 (diff) | |
| download | linux-5eaf1a9e233d61438377f57facb167f8208ba9fd.tar.xz | |
mm: thp: turn compound_head() into BUG_ON(!PageTail) in get_huge_page_tail()
get_huge_page_tail()->compound_head() looks confusing. Every caller
must check PageTail(page), otherwise atomic_inc(&page->_mapcount) is
simply wrong if this page is compound-trans-head.
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Dave Jones <davej@redhat.com>
Cc: Darren Hart <dvhart@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mel Gorman <mgorman@suse.de>
Acked-by: Andrea Arcangeli <aarcange@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
0 files changed, 0 insertions, 0 deletions