From 65899d855fbf5088be4a1d16adf9f7359f6a850c Mon Sep 17 00:00:00 2001 From: Laura Abbott Date: Tue, 9 Apr 2013 17:07:02 -0700 Subject: mm: highmem: Add definitions for kmap_atomic_flush_unused kmap_flush_unused does not flush kmap_atomic mappings which are handled separately. Architectures may have use cases to require these to be flushed. Add an option to let architectures define kmap_atomic flushing to get rid of extra mappings. Change-Id: I5a338ed9e215f0f0ad3ab58a3066d2f4c8ce3ba7 Signed-off-by: Laura Abbott --- include/linux/highmem.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/highmem.h b/include/linux/highmem.h index bb3f3297062a..4c70716759a6 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -39,6 +39,12 @@ extern unsigned long totalhigh_pages; void kmap_flush_unused(void); +#ifdef CONFIG_ARCH_WANT_KMAP_ATOMIC_FLUSH +void kmap_atomic_flush_unused(void); +#else +static inline void kmap_atomic_flush_unused(void) { } +#endif + struct page *kmap_to_page(void *addr); #else /* CONFIG_HIGHMEM */ @@ -80,6 +86,7 @@ static inline void __kunmap_atomic(void *addr) #define kmap_atomic_pfn(pfn) kmap_atomic(pfn_to_page(pfn)) #define kmap_flush_unused() do {} while(0) +#define kmap_atomic_flush_unused() do {} while (0) #endif #endif /* CONFIG_HIGHMEM */ -- cgit v1.2.3