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| author | Huaisheng Ye <yehs1@lenovo.com> | 2018-07-30 15:15:46 +0800 |
|---|---|---|
| committer | Dave Jiang <dave.jiang@intel.com> | 2018-07-30 09:39:28 -0700 |
| commit | e0b401e3fef0f81fd87434793db1adb0d7568058 (patch) | |
| tree | c0f68108b5d37ee18f15b4dfb0b48f234917808c /drivers/dax/super.c | |
| parent | 45df5d3dc0c7289c1e67afe6d2ba806ad5174314 (diff) | |
| download | lwn-e0b401e3fef0f81fd87434793db1adb0d7568058.tar.gz lwn-e0b401e3fef0f81fd87434793db1adb0d7568058.zip | |
dax/super: Do not request a pointer kaddr when not required
Function __bdev_dax_supported doesn't need to get local pointer kaddr
from direct_access. Using NULL instead of having to pass in a useless
local pointer that caller then just throw away.
Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to 'drivers/dax/super.c')
| -rw-r--r-- | drivers/dax/super.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/dax/super.c b/drivers/dax/super.c index 903d9c473749..c2f42b1f3363 100644 --- a/drivers/dax/super.c +++ b/drivers/dax/super.c @@ -88,7 +88,6 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) bool dax_enabled = false; pgoff_t pgoff; int err, id; - void *kaddr; pfn_t pfn; long len; char buf[BDEVNAME_SIZE]; @@ -114,7 +113,7 @@ bool __bdev_dax_supported(struct block_device *bdev, int blocksize) } id = dax_read_lock(); - len = dax_direct_access(dax_dev, pgoff, 1, &kaddr, &pfn); + len = dax_direct_access(dax_dev, pgoff, 1, NULL, &pfn); dax_read_unlock(id); put_dax(dax_dev); |