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| author | Frederic Weisbecker <fweisbec@gmail.com> | 2012-01-04 14:44:57 -0500 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-02-21 12:03:22 -0500 |
| commit | 18fec7d8758dd416904da205375e6fa667defc80 (patch) | |
| tree | 768f505120e075d9f93b83d0657dcaf712ea18e0 /kernel/rcutree_plugin.h | |
| parent | 4c62abc90bea439a4b50aad9f67a310fb9c392e1 (diff) | |
rcu: Improve synchronize_rcu() diagnostics
Although TREE_PREEMPT_RCU indirectly uses might_sleep() to detect illegal
use of synchronize_sched() and synchronize_rcu_bh() from within an RCU
read-side critical section, this might_sleep() check is bypassed when
there is only a single CPU (for example, when running an SMP kernel on
a single-CPU system). This patch therefore adds a might_sleep() call
to the rcu_blocking_is_gp() check that is unconditionally invoked from
both synchronize_sched() and synchronize_rcu_bh().
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/rcutree_plugin.h')
0 files changed, 0 insertions, 0 deletions