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    Subject[PATCH 7/13] FAT: kill unnecessary kmap()
    From
    Date

    Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
    ---

    fs/fat/inode.c | 22 +++++++---------------
    1 files changed, 7 insertions(+), 15 deletions(-)

    diff -puN fs/fat/inode.c~fat_kill-unnecessary_kmap fs/fat/inode.c
    --- linux-2.6.10/fs/fat/inode.c~fat_kill-unnecessary_kmap 2005-01-08 09:08:10.000000000 +0900
    +++ linux-2.6.10-hirofumi/fs/fat/inode.c 2005-01-08 09:08:10.000000000 +0900
    @@ -1137,30 +1137,22 @@ static int
    fat_prepare_write(struct file *file, struct page *page,
    unsigned from, unsigned to)
    {
    - kmap(page);
    return cont_prepare_write(page,from,to,fat_get_block,
    &MSDOS_I(page->mapping->host)->mmu_private);
    }

    -static int
    -fat_commit_write(struct file *file, struct page *page,
    - unsigned from, unsigned to)
    -{
    - kunmap(page);
    - return generic_commit_write(file, page, from, to);
    -}
    -
    static sector_t _fat_bmap(struct address_space *mapping, sector_t block)
    {
    return generic_block_bmap(mapping,block,fat_get_block);
    }
    +
    static struct address_space_operations fat_aops = {
    - .readpage = fat_readpage,
    - .writepage = fat_writepage,
    - .sync_page = block_sync_page,
    - .prepare_write = fat_prepare_write,
    - .commit_write = fat_commit_write,
    - .bmap = _fat_bmap
    + .readpage = fat_readpage,
    + .writepage = fat_writepage,
    + .sync_page = block_sync_page,
    + .prepare_write = fat_prepare_write,
    + .commit_write = generic_commit_write,
    + .bmap = _fat_bmap
    };

    /* doesn't deal with root inode */
    _
    -
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