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ARM: 6382/1: Remove superfluous flush_kernel_dcache_page()

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Since page cache pages are now considered 'dirty' by default, the cache
flushing is handled via __flush_dcache_page() when a page gets mapped to
user space. Highmem pages on VIVT systems are flushed during kunmap()
and flush_kernel_dcache_page() was already a no-op in this case.

ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE is still defined since ARM needs
specific implementations for flush_kernel_vmap_range() and
invalidate_kernel_vmap_range().

Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Catalin Marinas 2010-09-13 15:59:07 +01:00 committed by Russell King
parent 85848dd7ab
commit f8b63c184a
1 changed files with 0 additions and 3 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

3
arch/arm/include/asm/cacheflush.h
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@ -405,9 +405,6 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
#define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE
static inline void flush_kernel_dcache_page(struct page *page) static inline void flush_kernel_dcache_page(struct page *page)
{ {
/* highmem pages are always flushed upon kunmap already */
if ((cache_is_vivt() || cache_is_vipt_aliasing()) && !PageHighMem(page))
__cpuc_flush_dcache_area(page_address(page), PAGE_SIZE);
} }
#define flush_dcache_mmap_lock(mapping) \ #define flush_dcache_mmap_lock(mapping) \