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| author | Steven Whitehouse <swhiteho@redhat.com> | 2011-11-09 13:46:06 +0000 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2011-11-09 13:46:06 +0000 |
| commit | 79c4c379c8f16a12c28ea2084db5138e33d17ebd (patch) | |
| tree | f0d9648c0e4d1a087401c2e2cb7a4e5e9c80a99b | |
| parent | 114b80ce2c05f91f10fffbf303080357d73c0675 (diff) | |
| download | linux-79c4c379c8f16a12c28ea2084db5138e33d17ebd.tar.bz2 | |
GFS2: f_ra is always valid in dir readahead function
As a result, we don't need to test it each time.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Bob Peterson <rpeterso@redhat.com>
| -rw-r--r-- | fs/gfs2/dir.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c index 91441171bf25..946b6f88939e 100644 --- a/fs/gfs2/dir.c +++ b/fs/gfs2/dir.c @@ -1378,12 +1378,14 @@ out: return error; } -/* gfs2_dir_readahead - Issue read-ahead requests for leaf blocks. +/** + * gfs2_dir_readahead - Issue read-ahead requests for leaf blocks. * * Note: we can't calculate each index like dir_e_read can because we don't * have the leaf, and therefore we don't have the depth, and therefore we * don't have the length. So we have to just read enough ahead to make up - * for the loss of information. */ + * for the loss of information. + */ static void gfs2_dir_readahead(struct inode *inode, unsigned hsize, u32 index, struct file_ra_state *f_ra) { @@ -1394,7 +1396,7 @@ static void gfs2_dir_readahead(struct inode *inode, unsigned hsize, u32 index, unsigned count; /* First check if we've already read-ahead for the whole range. */ - if (!f_ra || index + MAX_RA_BLOCKS < f_ra->start) + if (index + MAX_RA_BLOCKS < f_ra->start) return; f_ra->start = max((pgoff_t)index, f_ra->start); @@ -1448,7 +1450,7 @@ static int dir_e_read(struct inode *inode, u64 *offset, void *opaque, hash = gfs2_dir_offset2hash(*offset); index = hash >> (32 - dip->i_depth); - if (f_ra && dip->i_hash_cache == NULL) + if (dip->i_hash_cache == NULL) f_ra->start = 0; lp = gfs2_dir_get_hash_table(dip); if (IS_ERR(lp)) |