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authorThomas Gleixner <tglx@linutronix.de>2020-05-12 10:44:43 +0300
committerThomas Gleixner <tglx@linutronix.de>2020-05-19 16:51:21 +0300
commitb1fcf9b83c4149c63d1e0c699e85f93cbe28e211 (patch)
tree39a5dc1ef4133da88b638dd6b432d0c8d85d51cb /include/linux/rcutree.h
parent8ae0ae6737ad449c8ae21e2bb01d9736f360a933 (diff)
downloadlinux-b1fcf9b83c4149c63d1e0c699e85f93cbe28e211.tar.xz
rcu: Provide __rcu_is_watching()
Same as rcu_is_watching() but without the preempt_disable/enable() pair inside the function. It is merked noinstr so it ends up in the non-instrumentable text section. This is useful for non-preemptible code especially in the low level entry section. Using rcu_is_watching() there results in a call to the preempt_schedule_notrace() thunk which triggers noinstr section warnings in objtool. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200512213810.518709291@linutronix.de
Diffstat (limited to 'include/linux/rcutree.h')
-rw-r--r--include/linux/rcutree.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/rcutree.h b/include/linux/rcutree.h
index 02016e0aa8eb..9366fa4d0717 100644
--- a/include/linux/rcutree.h
+++ b/include/linux/rcutree.h
@@ -58,6 +58,7 @@ extern int rcu_scheduler_active __read_mostly;
void rcu_end_inkernel_boot(void);
bool rcu_inkernel_boot_has_ended(void);
bool rcu_is_watching(void);
+bool __rcu_is_watching(void);
#ifndef CONFIG_PREEMPTION
void rcu_all_qs(void);
#endif