affs: use zero_user_page

Use zero_user_page() instead of open-coding it.

Signed-off-by: Nate Diller <nate.diller@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/affs/file.c b/fs/affs/file.c
index 4aa8079e71be8c7c9ffb7f92d88cd1ce852a38af..c8796906f584bdb2bffe406e186b4f17e6aa5c75 100644 (file)
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -628,11 +628,7 @@ static int affs_prepare_write_ofs(struct file *file, struct page *page, unsigned
                        return err;
        }
        if (to < PAGE_CACHE_SIZE) {
-               char *kaddr = kmap_atomic(page, KM_USER0);
-
-               memset(kaddr + to, 0, PAGE_CACHE_SIZE - to);
-               flush_dcache_page(page);
-               kunmap_atomic(kaddr, KM_USER0);
+               zero_user_page(page, to, PAGE_CACHE_SIZE - to, KM_USER0);
                if (size > offset + to) {
                        if (size < offset + PAGE_CACHE_SIZE)
                                tmp = size & ~PAGE_CACHE_MASK;