diff options
| author |   Huaisheng Ye <yehs1@lenovo.com> | 2018-07-30 15:15:47 +0800 |
|---|---|---|
| committer |   Dave Jiang <dave.jiang@intel.com> | 2018-07-30 09:40:04 -0700 |
| commit | f742267ae91faf241d2892878208dffc586ffe06 (patch) | |
| tree | 448302ecb3ae879da7cf7b2f84cc91c1dfb9a19c /drivers/md/dm-writecache.c | |
| parent | dax/super: Do not request a pointer kaddr when not required (diff) | |
| download | linux-dev-f742267ae91faf241d2892878208dffc586ffe06.tar.xz linux-dev-f742267ae91faf241d2892878208dffc586ffe06.zip | |
md/dm-writecache: Don't request pointer dummy_addr when not required
Function persistent_memory_claim doesn't need to get local pointer
dummy_addr from direct_access. Using NULL instead of having to pass
in a useless local pointer that caller then just throw away.
Suggested-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/md/dm-writecache.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c index 5961c7794ef3..1839236a0f81 100644 --- a/drivers/md/dm-writecache.c +++ b/drivers/md/dm-writecache.c @@ -267,9 +267,8 @@ static int persistent_memory_claim(struct dm_writecache *wc) i = 0; do { long daa; - void *dummy_addr; daa = dax_direct_access(wc->ssd_dev->dax_dev, i, p - i, - &dummy_addr, &pfn); + NULL, &pfn); if (daa <= 0) { r = daa ? daa : -EINVAL; goto err3; |