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| author |   Peter Zijlstra <peterz@infradead.org> | 2019-02-26 18:19:09 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2019-02-28 07:55:53 +0100 |
| commit | 28d49e282665e2a51cc91b716937fccfa24d80e1 (patch) | |
| tree | b815d7101244bc6d169cb107f7fff6bf8ba53a95 /include/linux/lockdep.h | |
| parent | locking/lockdep: Add module_param to enable consistency checks (diff) | |
| download | linux-dev-28d49e282665e2a51cc91b716937fccfa24d80e1.tar.xz linux-dev-28d49e282665e2a51cc91b716937fccfa24d80e1.zip | |
locking/lockdep: Shrink struct lock_class_key
Shrink struct lock_class_key; we never store anything in subkeys[], we
only use the addresses.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'include/linux/lockdep.h')
| -rw-r--r-- | include/linux/lockdep.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h index 43fb35bd7baf..79c3873d58ac 100644 --- a/include/linux/lockdep.h +++ b/include/linux/lockdep.h @@ -58,8 +58,10 @@ struct lockdep_subclass_key { /* hash_entry is used to keep track of dynamically allocated keys. */ struct lock_class_key { - struct hlist_node hash_entry; - struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES]; + union { + struct hlist_node hash_entry; + struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES]; + }; }; extern struct lock_class_key __lockdep_no_validate__; |