| From | "Kirill A. Shutemov" <> | Subject | [PATCHv4 17/39] thp, mm: handle tail pages in page_cache_get_speculative() | Date | Sun, 12 May 2013 04:23:14 +0300 |
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From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
For tail page we call __get_page_tail(). It has the same semantics, but for tail page.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> --- include/linux/pagemap.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 28597ec..2e86251 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -161,6 +161,9 @@ static inline int page_cache_get_speculative(struct page *page) { VM_BUG_ON(in_interrupt()); + if (unlikely(PageTail(page))) + return __get_page_tail(page); + #ifdef CONFIG_TINY_RCU # ifdef CONFIG_PREEMPT_COUNT VM_BUG_ON(!in_atomic()); @@ -187,7 +190,6 @@ static inline int page_cache_get_speculative(struct page *page) return 0; } #endif - VM_BUG_ON(PageTail(page)); return 1; } -- 1.7.10.4
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