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mm: fix build of split ptlock code

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Commit 597d795a2a ('mm: do not allocate page->ptl dynamically, if
spinlock_t fits to long') restructures some allocators that are compiled
even if USE_SPLIT_PTLOCKS arn't used.  It results in compilation
failure:

  mm/memory.c:4282:6: error: 'struct page' has no member named 'ptl'
  mm/memory.c:4288:12: error: 'struct page' has no member named 'ptl'

Add in the missing ifdef.

Fixes: 597d795a2a ('mm: do not allocate page->ptl dynamically, if spinlock_t fits to long')
Signed-off-by: Olof Johansson <olof@lixom.net>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Olof Johansson 2013-12-20 14:28:05 -08:00 committed by Linus Torvalds
parent 4773ef2241
commit 40b64acd17
1 changed files with 1 additions and 1 deletions
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mm/memory.c
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@ -4271,7 +4271,7 @@ void copy_user_huge_page(struct page *dst, struct page *src,
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */
#if ALLOC_SPLIT_PTLOCKS
#if USE_SPLIT_PTE_PTLOCKS && ALLOC_SPLIT_PTLOCKS
bool ptlock_alloc(struct page *page)
{
spinlock_t *ptl;