From d51c349b642d2c50611085db521cf31f5f985488 Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 4 May 2023 13:57:36 +0200 Subject: [PATCH] graph-lock: Add GRAPH_UNLOCKED(_PTR) For some functions, it is part of their interface to be called without holding the graph lock. Add a new macro to document this. The macro expands to TSA_EXCLUDES(), which is a relatively weak check because it passes in cases where the compiler just doesn't know if the lock is held. Function pointers can't be checked at all. Therefore, its primary purpose is documentation. Signed-off-by: Kevin Wolf Reviewed-by: Eric Blake Reviewed-by: Stefan Hajnoczi Message-Id: <20230504115750.54437-7-kwolf@redhat.com> Signed-off-by: Kevin Wolf --- include/block/graph-lock.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/block/graph-lock.h b/include/block/graph-lock.h index ac0fef8605..f17d1588e7 100644 --- a/include/block/graph-lock.h +++ b/include/block/graph-lock.h @@ -73,6 +73,7 @@ extern BdrvGraphLock graph_lock; */ #define GRAPH_WRLOCK TSA_REQUIRES(graph_lock) #define GRAPH_RDLOCK TSA_REQUIRES_SHARED(graph_lock) +#define GRAPH_UNLOCKED TSA_EXCLUDES(graph_lock) /* * TSA annotations are not part of function types, so checks are defeated when @@ -83,6 +84,7 @@ extern BdrvGraphLock graph_lock; */ #define GRAPH_RDLOCK_PTR TSA_GUARDED_BY(graph_lock) #define GRAPH_WRLOCK_PTR TSA_GUARDED_BY(graph_lock) +#define GRAPH_UNLOCKED_PTR /* * register_aiocontext: -- 2.30.2