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| author | Dan Williams <dan.j.williams@intel.com> | 2011-06-08 03:50:55 +0200 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2011-07-03 13:04:51 +0200 |
| commit | ac668c69709c7d927015c5cf3d9e87bf4eaaf57d (patch) | |
| tree | 16a42117d260a86b8217d266ab65b25438c48e06 /drivers/scsi/isci/isci.h | |
| parent | isci: Disable link layer hang detection (diff) | |
| download | linux-ac668c69709c7d927015c5cf3d9e87bf4eaaf57d.tar.xz linux-ac668c69709c7d927015c5cf3d9e87bf4eaaf57d.zip | |
isci: cleanup/optimize pool implementation
The circ_buf macros are ~6% faster, as measured by perf, because they take
advantage of power-of-two math assumptions i.e. no test and branch for
rollover. Their semantics are clearer than the hidden side effects in pool.h
(like sci_pool_get() which hides an assignment).
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi/isci/isci.h')
| -rw-r--r-- | drivers/scsi/isci/isci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/scsi/isci/isci.h b/drivers/scsi/isci/isci.h index 714ed926171b..84ba533ca51e 100644 --- a/drivers/scsi/isci/isci.h +++ b/drivers/scsi/isci/isci.h @@ -112,6 +112,7 @@ static inline void check_sizes(void) BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_UNSOLICITED_FRAMES); BUILD_BUG_ON_NOT_POWER_OF_2(SCU_MAX_COMPLETION_QUEUE_ENTRIES); BUILD_BUG_ON(SCU_MAX_UNSOLICITED_FRAMES > SCU_ABSOLUTE_MAX_UNSOLICITED_FRAMES); + BUILD_BUG_ON_NOT_POWER_OF_2(SCI_MAX_IO_REQUESTS); } /** |