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authorThomas Gleixner <tglx@linutronix.de>2022-08-25 19:41:27 +0300
committerThomas Gleixner <tglx@linutronix.de>2022-09-19 15:35:08 +0300
commita738e9bad6030d4fd33bfd7db3399a250b7e94d8 (patch)
tree35ae639c7c133b6722252ceacf28d7e5802698d9 /include/linux/mmdebug.h
parent7a025e91abd23effe869a05d037b26770ffa0309 (diff)
downloadlinux-a738e9bad6030d4fd33bfd7db3399a250b7e94d8.tar.xz
mm/debug: Provide VM_WARN_ON_IRQS_ENABLED()
Some places in the VM code expect interrupts disabled, which is a valid expectation on non-PREEMPT_RT kernels, but does not hold on RT kernels in some places because the RT spinlock substitution does not disable interrupts. To avoid sprinkling CONFIG_PREEMPT_RT conditionals into those places, provide VM_WARN_ON_IRQS_ENABLED() which is only enabled when VM_DEBUG=y and PREEMPT_RT=n. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Michal Hocko <mhocko@suse.com> Link: https://lore.kernel.org/r/20220825164131.402717-5-bigeasy@linutronix.de
Diffstat (limited to 'include/linux/mmdebug.h')
-rw-r--r--include/linux/mmdebug.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/mmdebug.h b/include/linux/mmdebug.h
index 15ae78cd2853..b8728d11c949 100644
--- a/include/linux/mmdebug.h
+++ b/include/linux/mmdebug.h
@@ -94,6 +94,12 @@ void dump_mm(const struct mm_struct *mm);
#define VM_WARN(cond, format...) BUILD_BUG_ON_INVALID(cond)
#endif
+#ifdef CONFIG_DEBUG_VM_IRQSOFF
+#define VM_WARN_ON_IRQS_ENABLED() WARN_ON_ONCE(!irqs_disabled())
+#else
+#define VM_WARN_ON_IRQS_ENABLED() do { } while (0)
+#endif
+
#ifdef CONFIG_DEBUG_VIRTUAL
#define VIRTUAL_BUG_ON(cond) BUG_ON(cond)
#else