Messages in this thread Patch in this message | | | From | ira.weiny@intel ... | Subject | [PATCH V2 2/8] mm/highmem: Convert memcpy_[to|from]_page() to kmap_local_page() | Date | Tue, 9 Feb 2021 22:22:15 -0800 |
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From: Ira Weiny <ira.weiny@intel.com>
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> Signed-off-by: Ira Weiny <ira.weiny@intel.com> --- New for V2 --- include/linux/highmem.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/include/linux/highmem.h b/include/linux/highmem.h index 736b6a9f144d..c17a175fe5fe 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -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 */ -- 2.28.0.rc0.12.gb6a658bd00c9
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