From dc10e9190b8ed8880df7604e7f8cdb6bdbe3b9d0 Mon Sep 17 00:00:00 2001 From: Nick Piggin Date: Wed, 14 Jan 2009 07:28:16 +0100 Subject: [PATCH] mm: fix assertion This assertion is incorrect for lockless pagecache. By definition if we have an unpinned page that we are trying to take a speculative reference to, it may become the tail of a compound page at any time (if it is freed, then reallocated as a compound page). It was still a valid assertion for the vmscan.c LRU isolation case, but it doesn't seem incredibly helpful... if somebody wants it, they can put it back directly where it applies in the vmscan code. Signed-off-by: Nick Piggin Signed-off-by: Linus Torvalds --- include/linux/mm.h | 1 - 1 file changed, 1 deletion(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index b91a73fd1bcc2..e8ddc98b8405f 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -260,7 +260,6 @@ static inline int put_page_testzero(struct page *page) */ static inline int get_page_unless_zero(struct page *page) { - VM_BUG_ON(PageTail(page)); return atomic_inc_not_zero(&page->_count); } -- 2.39.5