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authorOleg Nesterov <oleg@redhat.com>2014-01-21 15:49:02 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-01-21 16:19:43 -0800
commitc728852f5dd41ce34e7ce0a179cf28cd5f4dc301 (patch)
tree31b5ad2a079ad30901377c95d50cf62ef85f8ddf /mm/internal.h
parent9b7ac260188ddacffdcaadd6a61e4a502238a63f (diff)
downloadop-kernel-dev-c728852f5dd41ce34e7ce0a179cf28cd5f4dc301.zip
op-kernel-dev-c728852f5dd41ce34e7ce0a179cf28cd5f4dc301.tar.gz
mm: thp: __get_page_tail_foll() can use get_huge_page_tail()
Cleanup. Change __get_page_tail_foll() to use get_huge_page_tail() to avoid the code duplication. 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 'mm/internal.h')
-rw-r--r--mm/internal.h5
1 files changed, 1 insertions, 4 deletions
diff --git a/mm/internal.h b/mm/internal.h
index a85a3ab..a346ba1 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -47,12 +47,9 @@ static inline void __get_page_tail_foll(struct page *page,
* page_cache_get_speculative()) on tail pages.
*/
VM_BUG_ON(atomic_read(&page->first_page->_count) <= 0);
- VM_BUG_ON(atomic_read(&page->_count) != 0);
- VM_BUG_ON(page_mapcount(page) < 0);
if (get_page_head)
atomic_inc(&page->first_page->_count);
- if (compound_tail_refcounted(page->first_page))
- atomic_inc(&page->_mapcount);
+ get_huge_page_tail(page);
}
/*
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