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authorSteven Rostedt (Red Hat) <rostedt@goodmis.org>2013-07-12 16:50:28 -0400
committerSteven Rostedt <rostedt@goodmis.org>2013-07-29 17:07:49 -0400
commite66c33d579ea566d10e8c8695a7168aae3e02992 (patch)
treeb316d091004d823319afb6995539d4ad09386296 /kernel/rcutorture.c
parent102c9323c35a83789ad5ebd3c45fa8fb389add88 (diff)
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rcu: Add const annotation to char * for RCU tracepoints and functions
All the RCU tracepoints and functions that reference char pointers do so with just 'char *' even though they do not modify the contents of the string itself. This will cause warnings if a const char * is used in one of these functions. The RCU tracepoints store the pointer to the string to refer back to them when the trace output is displayed. As this can be minutes, hours or even days later, those strings had better be constant. This change also opens the door to allow the RCU tracepoint strings and their addresses to be exported so that userspace tracing tools can translate the contents of the pointers of the RCU tracepoints. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/rcutorture.c')
-rw-r--r--kernel/rcutorture.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index f4871e5..3d936f0f 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -267,7 +267,7 @@ rcutorture_shutdown_notify(struct notifier_block *unused1,
* Absorb kthreads into a kernel function that won't return, so that
* they won't ever access module text or data again.
*/
-static void rcutorture_shutdown_absorb(char *title)
+static void rcutorture_shutdown_absorb(const char *title)
{
if (ACCESS_ONCE(fullstop) == FULLSTOP_SHUTDOWN) {
pr_notice(
@@ -337,7 +337,7 @@ rcu_random(struct rcu_random_state *rrsp)
}
static void
-rcu_stutter_wait(char *title)
+rcu_stutter_wait(const char *title)
{
while (stutter_pause_test || !rcutorture_runnable) {
if (rcutorture_runnable)
@@ -366,7 +366,7 @@ struct rcu_torture_ops {
int (*stats)(char *page);
int irq_capable;
int can_boost;
- char *name;
+ const char *name;
};
static struct rcu_torture_ops *cur_ops;
@@ -1364,7 +1364,7 @@ rcu_torture_stutter(void *arg)
}
static inline void
-rcu_torture_print_module_parms(struct rcu_torture_ops *cur_ops, char *tag)
+rcu_torture_print_module_parms(struct rcu_torture_ops *cur_ops, const char *tag)
{
pr_alert("%s" TORTURE_FLAG
"--- %s: nreaders=%d nfakewriters=%d "