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NVMe: Avoid shift operation when writing cq head doorbell
authorHaiyan Hu <huhaiyan@huawei.com>
Tue, 10 Sep 2013 03:25:37 +0000 (11:25 +0800)
committerMatthew Wilcox <matthew.r.wilcox@intel.com>
Mon, 18 Nov 2013 22:10:51 +0000 (17:10 -0500)
commitd632475d6ba0ef71baf5607147142eae30059b9d
tree97d64d8d70ecc42f04ee52023c636d84c05e7a21tree | snapshot
parentb7c18f0a1f66f2d759cff75e363acf9bacaa1a34commit | diff
NVMe: Avoid shift operation when writing cq head doorbell

Changes the type of dev->db_stride to unsigned and changes the value
stored there to be 1 << the current value. Then there is less
calculation to be done at completion time.

Signed-off-by: Haiyan Hu <huhaiyan@huawei.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
drivers/block/nvme-core.c diff | blob | history
include/linux/nvme.h diff | blob | history
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