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| author |   Bob Peterson <rpeterso@redhat.com> | 2013-09-11 13:44:01 -0500 |
|---|---|---|
| committer |   Steven Whitehouse <swhiteho@redhat.com> | 2013-09-17 10:14:39 +0100 |
| commit | 6aa7640f306a1dd0923d29d9190c5686907d5140 (patch) | |
| tree | de2d5f54bbbeccd2aaa996eeceba8bd696b7d978 /lib/dump_stack.c | |
| parent | GFS2: d_splice_alias() can't return error (diff) | |
| download | linux-dev-6aa7640f306a1dd0923d29d9190c5686907d5140.tar.xz linux-dev-6aa7640f306a1dd0923d29d9190c5686907d5140.zip | |
GFS2: optimize rbm_from_block wrt bi_start
In function gfs2_rbm_from_block, it starts by checking if the block
falls within the first bitmap. It does so by checking if the rbm's
offset is less than (rbm->bi->bi_start + rbm->bi->bi_len) * GFS2_NBBY.
However, the first bitmap will always have bi_start==0. Therefore
this is an unnecessary calculation in a function that gets called
billions of times. This patch removes the reference to bi_start.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'lib/dump_stack.c')
0 files changed, 0 insertions, 0 deletions