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| -rw-r--r-- | include/linux/highmem.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/linux/highmem.h b/include/linux/highmem.h index c17a175fe5fe..0b5d89621cb9 100644 --- a/include/linux/highmem.h +++ b/include/linux/highmem.h @@ -276,6 +276,39 @@ static inline void copy_highpage(struct page *to, struct page *from) #endif +static inline void memcpy_page(struct page *dst_page, size_t dst_off, + struct page *src_page, size_t src_off, + size_t len) +{ + char *dst = kmap_local_page(dst_page); + char *src = kmap_local_page(src_page); + + memcpy(dst + dst_off, src + src_off, len); + kunmap_local(src); + kunmap_local(dst); +} + +static inline void memmove_page(struct page *dst_page, size_t dst_off, + struct page *src_page, size_t src_off, + size_t len) +{ + char *dst = kmap_local_page(dst_page); + char *src = kmap_local_page(src_page); + + memmove(dst + dst_off, src + src_off, len); + kunmap_local(src); + kunmap_local(dst); +} + +static inline void memset_page(struct page *page, size_t offset, int val, + size_t len) +{ + char *addr = kmap_local_page(page); + + memset(addr + offset, val, len); + kunmap_local(addr); +} + static inline void memcpy_from_page(char *to, struct page *page, size_t offset, size_t len) { |