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| author | Haiyan Hu <huhaiyan@huawei.com> | 2013-09-10 11:25:37 +0800 |
|---|---|---|
| committer | Matthew Wilcox <matthew.r.wilcox@intel.com> | 2013-11-18 17:10:51 -0500 |
| commit | b80d5ccca3a012e91ca64a2a0b13049163a6a698 (patch) | |
| tree | 97d64d8d70ecc42f04ee52023c636d84c05e7a21 /include | |
| parent | 2d3c627502f2a9b0a7de06a5a2df2365542a72c9 (diff) | |
| download | linux-b80d5ccca3a012e91ca64a2a0b13049163a6a698.tar.gz linux-b80d5ccca3a012e91ca64a2a0b13049163a6a698.tar.bz2 linux-b80d5ccca3a012e91ca64a2a0b13049163a6a698.zip | |
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/nvme.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 26ebcf41c213..8119a476cb29 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -80,7 +80,7 @@ struct nvme_dev { struct dma_pool *prp_small_pool; int instance; int queue_count; - int db_stride; + u32 db_stride; u32 ctrl_config; struct msix_entry *entry; struct nvme_bar __iomem *bar; |