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| author | Xishi Qiu <qiuxishi@huawei.com> | 2013-11-12 15:07:13 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 12:09:03 +0900 |
| commit | c1ce4b375fa7b76d8b553d4f8d6cc5a09f063691 (patch) | |
| tree | 50ed8b8cdfbbd6ae59c99f9650a24192be3aa34b | |
| parent | 9e4be4708e9e88da46ae1f0bb1054c3619cc476e (diff) | |
| download | linux-c1ce4b375fa7b76d8b553d4f8d6cc5a09f063691.tar.bz2 | |
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>
| -rw-r--r-- | arch/metag/kernel/dma.c | 4 | ||||
| -rw-r--r-- | arch/microblaze/mm/consistent.c | 7 | ||||
| -rw-r--r-- | arch/powerpc/mm/dma-noncoherent.c | 4 |
3 files changed, 4 insertions, 11 deletions
diff --git a/arch/metag/kernel/dma.c b/arch/metag/kernel/dma.c index 8c00dedadc54..db589ad5dbc4 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; } } diff --git a/arch/microblaze/mm/consistent.c b/arch/microblaze/mm/consistent.c index 5226b09cbbb2..dbbf2246a260 100644 --- a/arch/microblaze/mm/consistent.c +++ b/arch/microblaze/mm/consistent.c @@ -176,8 +176,7 @@ void consistent_free(size_t size, void *vaddr) page = virt_to_page(vaddr); do { - ClearPageReserved(page); - __free_page(page); + __free_reserved_page(page); page++; } while (size -= PAGE_SIZE); #else @@ -194,9 +193,7 @@ void consistent_free(size_t size, void *vaddr) pte_clear(&init_mm, (unsigned int)vaddr, ptep); if (pfn_valid(pfn)) { page = pfn_to_page(pfn); - - ClearPageReserved(page); - __free_page(page); + __free_reserved_page(page); } } vaddr += PAGE_SIZE; diff --git a/arch/powerpc/mm/dma-noncoherent.c b/arch/powerpc/mm/dma-noncoherent.c index 6747eece84af..7b6c10750179 100644 --- a/arch/powerpc/mm/dma-noncoherent.c +++ b/arch/powerpc/mm/dma-noncoherent.c @@ -287,9 +287,7 @@ void __dma_free_coherent(size_t size, void *vaddr) pte_clear(&init_mm, addr, ptep); if (pfn_valid(pfn)) { struct page *page = pfn_to_page(pfn); - - ClearPageReserved(page); - __free_page(page); + __free_reserved_page(page); } } addr += PAGE_SIZE; |