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authorXishi Qiu <qiuxishi@huawei.com>2013-11-12 15:07:13 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-13 12:09:03 +0900
commitc1ce4b375fa7b76d8b553d4f8d6cc5a09f063691 (patch)
tree50ed8b8cdfbbd6ae59c99f9650a24192be3aa34b /arch/metag
parent9e4be4708e9e88da46ae1f0bb1054c3619cc476e (diff)
downloadlinux-c1ce4b375fa7b76d8b553d4f8d6cc5a09f063691.tar.gz
mm/arch: use __free_reserved_page() to simplify the code
Use __free_reserved_page() to simplify the code in arch. It used split_page() in consistent_alloc()/__dma_alloc_coherent()/dma_alloc_coherent(), so page->_count == 1, and we can free it safely. __free_reserved_page() ClearPageReserved() init_page_count() // it won't change the value __free_page() Signed-off-by: Xishi Qiu <qiuxishi@huawei.com> Cc: James Hogan <james.hogan@imgtec.com> Cc: Michal Simek <monstr@monstr.eu> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/metag')
-rw-r--r--arch/metag/kernel/dma.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c
index 8c00dedadc5..db589ad5dbc 100644
--- a/arch/metag/kernel/dma.c
+++ b/arch/metag/kernel/dma.c
@@ -305,9 +305,7 @@ void dma_free_coherent(struct device *dev, size_t size,
if (pfn_valid(pfn)) {
struct page *page = pfn_to_page(pfn);
- ClearPageReserved(page);
-
- __free_page(page);
+ __free_reserved_page(page);
continue;
}
}