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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2014-07-12 19:01:49 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2014-09-07 16:18:14 -0700 |
| commit | a8a29b3b7b18251c4e3ffce501f25ae868302a75 (patch) | |
| tree | c1a38c47ae43dc8f89e17d32a3c19434470cd78e /kernel/rcu | |
| parent | 85b39d305bfe809a11ff2770d380be3e2465beec (diff) | |
| download | linux-stable-a8a29b3b7b18251c4e3ffce501f25ae868302a75.tar.gz linux-stable-a8a29b3b7b18251c4e3ffce501f25ae868302a75.tar.bz2 linux-stable-a8a29b3b7b18251c4e3ffce501f25ae868302a75.zip | |
rcu: Define tracepoint strings only if CONFIG_TRACING is set
Commit f7f7bac9cb1c ("rcu: Have the RCU tracepoints use the tracepoint_string
infrastructure") unconditionally populates the __tracepoint_str input section,
but this section is not assigned an output section if CONFIG_TRACING is not set.
This results in the __tracepoint_str turning up in unexpected places, i.e.,
after _edata.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcu')
| -rw-r--r-- | kernel/rcu/tree.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 2719978ea018..dc52dc3b8c3e 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -79,9 +79,18 @@ static struct lock_class_key rcu_fqs_class[RCU_NUM_LVLS]; * the tracing userspace tools to be able to decipher the string * address to the matching string. */ -#define RCU_STATE_INITIALIZER(sname, sabbr, cr) \ +#ifdef CONFIG_TRACING +# define DEFINE_RCU_TPS(sname) \ static char sname##_varname[] = #sname; \ -static const char *tp_##sname##_varname __used __tracepoint_string = sname##_varname; \ +static const char *tp_##sname##_varname __used __tracepoint_string = sname##_varname; +# define RCU_STATE_NAME(sname) sname##_varname +#else +# define DEFINE_RCU_TPS(sname) +# define RCU_STATE_NAME(sname) __stringify(sname) +#endif + +#define RCU_STATE_INITIALIZER(sname, sabbr, cr) \ +DEFINE_RCU_TPS(sname) \ struct rcu_state sname##_state = { \ .level = { &sname##_state.node[0] }, \ .call = cr, \ @@ -93,7 +102,7 @@ struct rcu_state sname##_state = { \ .orphan_donetail = &sname##_state.orphan_donelist, \ .barrier_mutex = __MUTEX_INITIALIZER(sname##_state.barrier_mutex), \ .onoff_mutex = __MUTEX_INITIALIZER(sname##_state.onoff_mutex), \ - .name = sname##_varname, \ + .name = RCU_STATE_NAME(sname), \ .abbr = sabbr, \ }; \ DEFINE_PER_CPU(struct rcu_data, sname##_data) |