Messages in this thread Patch in this message | | | From | Frederic Weisbecker <> | Subject | [PATCH 07/14] x86: Use lockdep to assert IRQs are disabled/enabled | Date | Fri, 20 Oct 2017 02:56:04 +0200 |
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Use lockdep to check that IRQs are enabled or disabled as expected. This way the sanity check only shows overhead when concurrency correctness debug code is enabled.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> --- arch/x86/entry/common.c | 2 +- arch/x86/kernel/smpboot.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c index 03505ff..b4f3a55 100644 --- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -186,7 +186,7 @@ __visible inline void prepare_exit_to_usermode(struct pt_regs *regs) addr_limit_user_check(); - if (IS_ENABLED(CONFIG_PROVE_LOCKING) && WARN_ON(!irqs_disabled())) + if (!lockdep_assert_irqs_disabled()) local_irq_disable(); lockdep_sys_exit(); diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index aed1460..aee08a4 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1095,7 +1095,7 @@ int native_cpu_up(unsigned int cpu, struct task_struct *tidle) unsigned long flags; int err, ret = 0; - WARN_ON(irqs_disabled()); + lockdep_assert_irqs_enabled(); pr_debug("++++++++++++++++++++=_---CPU UP %u\n", cpu); -- 2.7.4
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