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| author | Paul E. McKenney <paul.mckenney@linaro.org> | 2012-07-31 19:12:48 +0200 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@linux.vnet.ibm.com> | 2012-09-23 16:42:49 +0200 |
| commit | b4270ee356e5ecef5394ab80c0a0301c1676b7f0 (patch) | |
| tree | d600c6dcea20363414220b9b369832af97a8a090 /kernel/Kconfig.preempt | |
| parent | rcu: Properly initialize ->boost_tasks on CPU offline (diff) | |
| download | linux-b4270ee356e5ecef5394ab80c0a0301c1676b7f0.tar.xz linux-b4270ee356e5ecef5394ab80c0a0301c1676b7f0.zip | |
rcu: Permit RCU_NONIDLE() to be used from interrupt context
There is a need to use RCU from interrupt context, but either before
rcu_irq_enter() is called or after rcu_irq_exit() is called. If the
interrupt occurs from idle, then lockdep-RCU will complain about such
uses, as they appear to be illegal uses of RCU from the idle loop.
In other environments, RCU_NONIDLE() could be used to properly protect
the use of RCU, but RCU_NONIDLE() currently cannot be invoked except
from process context.
This commit therefore modifies RCU_NONIDLE() to permit its use more
globally.
Reported-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Paul E. McKenney <paul.mckenney@linaro.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Diffstat (limited to 'kernel/Kconfig.preempt')
0 files changed, 0 insertions, 0 deletions