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mm/highmem: Convert memcpy_[to|from]_page() to kmap_local_page()
kmap_local_page() is more efficient and is well suited for these calls. Convert the kmap() to kmap_local_page() Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Christoph Hellwig <hch@infradead.org> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Ira Weiny <ira.weiny@intel.com> Signed-off-by: David Sterba <dsterba@suse.com>
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1 changed files with 4 additions and 4 deletions
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@ -279,19 +279,19 @@ static inline void copy_highpage(struct page *to, struct page *from)
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static inline void memcpy_from_page(char *to, struct page *page,
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size_t offset, size_t len)
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{
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char *from = kmap_atomic(page);
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char *from = kmap_local_page(page);
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memcpy(to, from + offset, len);
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kunmap_atomic(from);
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kunmap_local(from);
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}
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static inline void memcpy_to_page(struct page *page, size_t offset,
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const char *from, size_t len)
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{
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char *to = kmap_atomic(page);
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char *to = kmap_local_page(page);
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memcpy(to + offset, from, len);
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kunmap_atomic(to);
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kunmap_local(to);
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}
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#endif /* _LINUX_HIGHMEM_H */
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