[GFS2] use zero_user_page

Use zero_user_page() instead of open-coding it.

Signed-off-by: Nate Diller <nate.diller@gmail.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index c53a5d2d0590ea0a90fc38ff5d470df88736b57e..1c40c4bbf379118b9a4f0adeeba25ac135ce11c4 100644 (file)
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -885,7 +885,6 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
        unsigned blocksize, iblock, length, pos;
        struct buffer_head *bh;
        struct page *page;
-       void *kaddr;
        int err;
 
        page = grab_cache_page(mapping, index);
@@ -933,10 +932,7 @@ static int gfs2_block_truncate_page(struct address_space *mapping)
        if (sdp->sd_args.ar_data == GFS2_DATA_ORDERED || gfs2_is_jdata(ip))
                gfs2_trans_add_bh(ip->i_gl, bh, 0);
 
-       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);
 
 unlock:
        unlock_page(page);