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authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>2008-03-24 12:29:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-03-24 19:22:19 -0700
commit58336114af4d2cce830201aae49e50b93ede6c5c (patch)
treee3df187b38657b86953a5ead5b022572c35c8288
parentfd3c36f8b527d13cf311d15e0702bc0390956970 (diff)
markers: remove ACCESS_ONCE
As Paul pointed out, the ACCESS_ONCE are not needed because we already have the explicit surrounding memory barriers. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Christoph Hellwig <hch@infradead.org> Cc: Mike Mason <mmlnx@us.ibm.com> Cc: Dipankar Sarma <dipankar@in.ibm.com> Cc: David Smith <dsmith@redhat.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Adrian Bunk <adrian.bunk@movial.fi> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--kernel/marker.c12
1 files changed, 6 insertions, 6 deletions
diff --git a/kernel/marker.c b/kernel/marker.c
index ccae1d10e32f..041c33e3e95c 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -109,13 +109,13 @@ void marker_probe_cb(const struct marker *mdata, void *call_private,
* modules and they insure RCU read coherency.
*/
preempt_disable();
- ptype = ACCESS_ONCE(mdata->ptype);
+ ptype = mdata->ptype;
if (likely(!ptype)) {
marker_probe_func *func;
/* Must read the ptype before ptr. They are not data dependant,
* so we put an explicit smp_rmb() here. */
smp_rmb();
- func = ACCESS_ONCE(mdata->single.func);
+ func = mdata->single.func;
/* Must read the ptr before private data. They are not data
* dependant, so we put an explicit smp_rmb() here. */
smp_rmb();
@@ -133,7 +133,7 @@ void marker_probe_cb(const struct marker *mdata, void *call_private,
* in the fast path, so put the explicit barrier here.
*/
smp_read_barrier_depends();
- multi = ACCESS_ONCE(mdata->multi);
+ multi = mdata->multi;
for (i = 0; multi[i].func; i++) {
va_start(args, fmt);
multi[i].func(multi[i].probe_private, call_private, fmt,
@@ -161,13 +161,13 @@ void marker_probe_cb_noarg(const struct marker *mdata,
char ptype;
preempt_disable();
- ptype = ACCESS_ONCE(mdata->ptype);
+ ptype = mdata->ptype;
if (likely(!ptype)) {
marker_probe_func *func;
/* Must read the ptype before ptr. They are not data dependant,
* so we put an explicit smp_rmb() here. */
smp_rmb();
- func = ACCESS_ONCE(mdata->single.func);
+ func = mdata->single.func;
/* Must read the ptr before private data. They are not data
* dependant, so we put an explicit smp_rmb() here. */
smp_rmb();
@@ -183,7 +183,7 @@ void marker_probe_cb_noarg(const struct marker *mdata,
* in the fast path, so put the explicit barrier here.
*/
smp_read_barrier_depends();
- multi = ACCESS_ONCE(mdata->multi);
+ multi = mdata->multi;
for (i = 0; multi[i].func; i++)
multi[i].func(multi[i].probe_private, call_private, fmt,
&args);

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