reiserfs: 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>

1 files changed, 2 insertions, 11 deletions

diff --git a/fs/reiserfs/inode.c b/fs/reiserfs/inode.c
index 9fcbfe316977..1272d11399fb 100644
--- a/fs/reiserfs/inode.c
+++ b/fs/reiserfs/inode.c
@@ -2148,13 +2148,8 @@ int reiserfs_truncate_file(struct inode *p_s_inode, int update_timestamps)
                 length = offset & (blocksize - 1);
                 /* if we are not on a block boundary */
                 if (length) {
-                        char *kaddr;
-
                         length = blocksize - length;
-                        kaddr = kmap_atomic(page, KM_USER0);
-                        memset(kaddr + offset, 0, length);
-                        flush_dcache_page(page);
-                        kunmap_atomic(kaddr, KM_USER0);
+                        zero_user_page(page, offset, length, KM_USER0);
                         if (buffer_mapped(bh) && bh->b_blocknr != 0) {
                                 mark_buffer_dirty(bh);
                         }
@@ -2370,7 +2365,6 @@ static int reiserfs_write_full_page(struct page *page,
          ** last byte in the file
          */
         if (page->index >= end_index) {
-                char *kaddr;
                 unsigned last_offset;
 
                 last_offset = inode->i_size & (PAGE_CACHE_SIZE - 1);
@@ -2379,10 +2373,7 @@ static int reiserfs_write_full_page(struct page *page,
                         unlock_page(page);
                         return 0;
                 }
-                kaddr = kmap_atomic(page, KM_USER0);
-                memset(kaddr + last_offset, 0, PAGE_CACHE_SIZE - last_offset);
-                flush_dcache_page(page);
-                kunmap_atomic(kaddr, KM_USER0);
+                zero_user_page(page, last_offset, PAGE_CACHE_SIZE - last_offset, KM_USER0);
         }
         bh = head;
         block = page->index << (PAGE_CACHE_SHIFT - s->s_blocksize_bits);