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| author | Yuyang Du <duyuyang@gmail.com> | 2019-05-06 16:19:24 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2019-06-03 11:55:43 +0200 |
| commit | f6ec8829ac9d59b637366c13038f15d6f6156fe1 (patch) | |
| tree | 66564bff3b185212908d1c4c164d0304af2d9f12 /init | |
| parent | e196e479a3b844da6e6e71e0d2a8694040cb4e52 (diff) | |
| download | lwn-f6ec8829ac9d59b637366c13038f15d6f6156fe1.tar.gz lwn-f6ec8829ac9d59b637366c13038f15d6f6156fe1.zip | |
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.c | 2 |
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 |