From 54da6a0924311c7cf5015533991e44fb8eb12773 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Fri, 26 May 2023 12:23:48 +0200 Subject: locking: Introduce __cleanup() based infrastructure Use __attribute__((__cleanup__(func))) to build: - simple auto-release pointers using __free() - 'classes' with constructor and destructor semantics for scope-based resource management. - lock guards based on the above classes. Signed-off-by: Peter Zijlstra (Intel) Link: https://lkml.kernel.org/r/20230612093537.614161713%40infradead.org --- include/linux/srcu.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/srcu.h') diff --git a/include/linux/srcu.h b/include/linux/srcu.h index 41c4b26fb1c1..b3b1def982dd 100644 --- a/include/linux/srcu.h +++ b/include/linux/srcu.h @@ -343,4 +343,9 @@ static inline void smp_mb__after_srcu_read_unlock(void) /* __srcu_read_unlock has smp_mb() internally so nothing to do here. */ } +DEFINE_LOCK_GUARD_1(srcu, struct srcu_struct, + _T->idx = srcu_read_lock(_T->lock), + srcu_read_unlock(_T->lock, _T->idx), + int idx) + #endif -- cgit v1.2.3