Hi Chao,
On Mon, Mar 23, 2015 at 10:28:00AM +0800, Chao Yu wrote:
> Map bh over max size which caller defined is not needed, limit it in
> f2fs_map_bh.
>
> Signed-off-by: Chao Yu <chao2...@samsung.com>
> ---
> fs/f2fs/data.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
> index f0a18a0..a99bc7f 100644
> --- a/fs/f2fs/data.c
> +++ b/fs/f2fs/data.c
> @@ -255,15 +255,16 @@ static void f2fs_map_bh(struct super_block *sb, pgoff_t
> pgofs,
> struct extent_info *ei, struct buffer_head *bh_result)
> {
> unsigned int blkbits = sb->s_blocksize_bits;
> + unsigned int maxblocks = bh_result->b_size >> blkbits;
> size_t count;
>
> clear_buffer_new(bh_result);
> map_bh(bh_result, sb, ei->blk + pgofs - ei->fofs);
> count = ei->fofs + ei->len - pgofs;
> - if (count < (UINT_MAX >> blkbits))
> - bh_result->b_size = (count << blkbits);
> + if (count > maxblocks)
> + bh_result->b_size = maxblocks << blkbits;
> else
> - bh_result->b_size = UINT_MAX;
> + bh_result->b_size = count << blkbits;
How about using min()?
Thanks,
> }
>
> static bool lookup_extent_info(struct inode *inode, pgoff_t pgofs,
> --
> 2.3.3
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