Subject: + mm-arch-use-__free_reserved_page-to-simplify-the-code.patch added to -mm tree
To: qiuxishi@xxxxxxxxxx,benh@xxxxxxxxxxxxxxxxxxx,james.hogan@xxxxxxxxxx,monstr@xxxxxxxxx,paulus@xxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Wed, 18 Sep 2013 14:06:16 -0700
The patch titled
Subject: mm/arch: use __free_reserved_page() to simplify the code
has been added to the -mm tree. Its filename is
mm-arch-use-__free_reserved_page-to-simplify-the-code.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-arch-use-__free_reserved_page-to-simplify-the-code.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-arch-use-__free_reserved_page-to-simplify-the-code.patch
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------------------------------------------------------
From: Xishi Qiu <qiuxishi@xxxxxxxxxx>
Subject: 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@xxxxxxxxxx>
Cc: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Michal Simek <monstr@xxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/metag/kernel/dma.c | 4 +---
arch/microblaze/mm/consistent.c | 7 ++-----
arch/powerpc/mm/dma-noncoherent.c | 4 +---
3 files changed, 4 insertions(+), 11 deletions(-)
diff -puN arch/metag/kernel/dma.c~mm-arch-use-__free_reserved_page-to-simplify-the-code arch/metag/kernel/dma.c
--- a/arch/metag/kernel/dma.c~mm-arch-use-__free_reserved_page-to-simplify-the-code
+++ a/arch/metag/kernel/dma.c
@@ -305,9 +305,7 @@ void dma_free_coherent(struct device *de
if (pfn_valid(pfn)) {
struct page *page = pfn_to_page(pfn);
- ClearPageReserved(page);
-
- __free_page(page);
+ __free_reserved_page(page);
continue;
}
}
diff -puN arch/microblaze/mm/consistent.c~mm-arch-use-__free_reserved_page-to-simplify-the-code arch/microblaze/mm/consistent.c
--- a/arch/microblaze/mm/consistent.c~mm-arch-use-__free_reserved_page-to-simplify-the-code
+++ a/arch/microblaze/mm/consistent.c
@@ -176,8 +176,7 @@ void consistent_free(size_t size, void *
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 *
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 -puN arch/powerpc/mm/dma-noncoherent.c~mm-arch-use-__free_reserved_page-to-simplify-the-code arch/powerpc/mm/dma-noncoherent.c
--- a/arch/powerpc/mm/dma-noncoherent.c~mm-arch-use-__free_reserved_page-to-simplify-the-code
+++ a/arch/powerpc/mm/dma-noncoherent.c
@@ -287,9 +287,7 @@ void __dma_free_coherent(size_t size, vo
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;
_
Patches currently in -mm which might be from qiuxishi@xxxxxxxxxx are
mm-arch-use-__free_reserved_page-to-simplify-the-code.patch
documentation-dma-attributestxt-fix-typo.patch
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