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    Subject[PATCH] [GFS2] use zero_user_page
    Date
    From: Nate Diller <nate.diller@gmail.com>

    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 c53a5d2..1c40c4b 100644
    --- 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);
    --
    1.5.1.2
    -
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