Commit 28d49e28 authored Feb 26, 2019 by Peter Zijlstra Committed by Ingo Molnar Feb 28, 2019

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>

parent 72dcd505

include/linux/lockdep.h

+4 −2

Original line number	Diff line number	Diff line
		@@ -58,9 +58,11 @@ struct lockdep_subclass_key {

		/* hash_entry is used to keep track of dynamically allocated keys. */
		struct lock_class_key {
		union {
		struct hlist_node hash_entry;
		struct lockdep_subclass_key subkeys[MAX_LOCKDEP_SUBCLASSES];
		};
		};

		extern struct lock_class_key __lockdep_no_validate__;