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Commit af8a4610 authored by Laura Abbott's avatar Laura Abbott Committed by Gerrit - the friendly Code Review server
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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: default avatarLaura Abbott <lauraa@codeaurora.org>
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent 3295850b

include/linux/highmem.h

+7 −0
Original line number Diff line number Diff line
@@ -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 */