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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2013-03-13 11:15:19 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-28 12:06:02 -0700 |
| commit | 7bdb127976b88b761bdd0b2a2756b35681655ce1 (patch) | |
| tree | dc35c5e029b8f07c849131d9f94a431156775824 /CREDITS | |
| parent | cdeff82601556a61c22f6e27dfeefb9af823485a (diff) | |
| download | kernel_samsung_smdk4412-7bdb127976b88b761bdd0b2a2756b35681655ce1.zip kernel_samsung_smdk4412-7bdb127976b88b761bdd0b2a2756b35681655ce1.tar.gz kernel_samsung_smdk4412-7bdb127976b88b761bdd0b2a2756b35681655ce1.tar.bz2 | |
tracing: Fix free of probe entry by calling call_rcu_sched()
commit 740466bc89ad8bd5afcc8de220f715f62b21e365 upstream.
Because function tracing is very invasive, and can even trace
calls to rcu_read_lock(), RCU access in function tracing is done
with preempt_disable_notrace(). This requires a synchronize_sched()
for updates and not a synchronize_rcu().
Function probes (traceon, traceoff, etc) must be freed after
a synchronize_sched() after its entry has been removed from the
hash. But call_rcu() is used. Fix this by using call_rcu_sched().
Also fix the usage to use hlist_del_rcu() instead of hlist_del().
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Paul McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'CREDITS')
0 files changed, 0 insertions, 0 deletions