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| author | Dan Williams <dan.j.williams@intel.com> | 2011-06-10 01:04:28 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2011-07-03 13:04:51 +0200 |
| commit | 994a9303d33f8238d57f58c26067b6d4ac9af222 (patch) | |
| tree | 8a7a1f680761ee3cfb2a258c2784194eea69b703 /drivers/scsi/isci/request.c | |
| parent | isci: cleanup tag macros (diff) | |
| download | linux-994a9303d33f8238d57f58c26067b6d4ac9af222.tar.xz linux-994a9303d33f8238d57f58c26067b6d4ac9af222.zip | |
isci: cleanup/optimize queue increment macros
Every single i/o or event completion incurs a test and branch to see if
the cycle bit changed. For power-of-2 queue sizes the cycle bit can be
read directly from the rollover of the queue pointer.
Likely premature optimization, but the hidden if() and hidden
assignments / side-effects in the macros were already asking to be
cleaned up.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi/isci/request.c')
0 files changed, 0 insertions, 0 deletions