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mm/highmem: Convert memcpy_[to|from]_page() to kmap_local_page()

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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>
This commit is contained in:
Ira Weiny 2021-02-09 22:22:15 -08:00 committed by David Sterba
parent bb90d4bc7b
commit 61b205f579
1 changed files with 4 additions and 4 deletions
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8
include/linux/highmem.h
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@ -279,19 +279,19 @@ static inline void copy_highpage(struct page *to, struct page *from)
static inline void memcpy_from_page(char *to, struct page *page,
size_t offset, size_t len)
{
char *from = kmap_atomic(page);
char *from = kmap_local_page(page);
memcpy(to, from + offset, len);
kunmap_atomic(from);
kunmap_local(from);
}
static inline void memcpy_to_page(struct page *page, size_t offset,
const char *from, size_t len)
{
char *to = kmap_atomic(page);
char *to = kmap_local_page(page);
memcpy(to + offset, from, len);
kunmap_atomic(to);
kunmap_local(to);
}
#endif /* _LINUX_HIGHMEM_H */