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Subject[PATCH v2 3/9] dcache: Replace smp_read_barrier_depends() with lockless_dereference()
Date
Recently lockless_dereference() was added which can be used in place of
hard-coding smp_read_barrier_depends(). The following PATCH makes the change.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
fs/dcache.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/fs/dcache.c b/fs/dcache.c
index a6c5d7e..27b8b5b 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -230,8 +230,7 @@ static inline int dentry_cmp(const struct dentry *dentry, const unsigned char *c
* early because the data cannot match (there can
* be no NUL in the ct/tcount data)
*/
- cs = ACCESS_ONCE(dentry->d_name.name);
- smp_read_barrier_depends();
+ cs = lockless_dereference(dentry->d_name.name);
return dentry_string_cmp(cs, ct, tcount);
}

@@ -2714,10 +2713,8 @@ static int prepend(char **buffer, int *buflen, const char *str, int namelen)
static int prepend_name(char **buffer, int *buflen, struct qstr *name)
{
const char *dname = ACCESS_ONCE(name->name);
- u32 dlen = ACCESS_ONCE(name->len);
char *p;
-
- smp_read_barrier_depends();
+ u32 dlen = lockless_dereference(name->len);

*buflen -= dlen + 1;
if (*buflen < 0)
--
1.9.1


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