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authorYuyang Du <duyuyang@gmail.com>2019-05-06 16:19:24 +0800
committerIngo Molnar <mingo@kernel.org>2019-06-03 11:55:43 +0200
commitf6ec8829ac9d59b637366c13038f15d6f6156fe1 (patch)
tree66564bff3b185212908d1c4c164d0304af2d9f12 /init
parente196e479a3b844da6e6e71e0d2a8694040cb4e52 (diff)
locking/lockdep: Define INITIAL_CHAIN_KEY for chain keys to start with
Chain keys are computed using Jenkins hash function, which needs an initial hash to start with. Dedicate a macro to make this clear and configurable. A later patch changes this initial chain key. Signed-off-by: Yuyang Du <duyuyang@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: bvanassche@acm.org Cc: frederic@kernel.org Cc: ming.lei@redhat.com Cc: will.deacon@arm.com Link: https://lkml.kernel.org/r/20190506081939.74287-9-duyuyang@gmail.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'init')
-rw-r--r--init/init_task.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/init/init_task.c b/init/init_task.c
index 1b15cb90d64f..afa6ad795355 100644
--- a/init/init_task.c
+++ b/init/init_task.c
@@ -167,7 +167,7 @@ struct task_struct init_task
#endif
#ifdef CONFIG_LOCKDEP
.lockdep_depth = 0, /* no locks held yet */
- .curr_chain_key = 0,
+ .curr_chain_key = INITIAL_CHAIN_KEY,
.lockdep_recursion = 0,
#endif
#ifdef CONFIG_FUNCTION_GRAPH_TRACER

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