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locking/static_keys: Provide DECLARE and well as DEFINE macros

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We will need to provide declarations of static keys in header
files. Provide DECLARE_STATIC_KEY_{TRUE,FALSE} macros.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/816881cf85bd3cf13385d212882618f38a3b5d33.1472754711.git.tony.luck@intel.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Tony Luck 2016-09-01 11:39:33 -07:00 committed by Thomas Gleixner
parent c6935931c1
commit b8fb03785d
1 changed files with 6 additions and 0 deletions
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6
include/linux/jump_label.h
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@ -267,9 +267,15 @@ struct static_key_false {
#define DEFINE_STATIC_KEY_TRUE(name) \
struct static_key_true name = STATIC_KEY_TRUE_INIT
#define DECLARE_STATIC_KEY_TRUE(name) \
extern struct static_key_true name
#define DEFINE_STATIC_KEY_FALSE(name) \
struct static_key_false name = STATIC_KEY_FALSE_INIT
#define DECLARE_STATIC_KEY_FALSE(name) \
extern struct static_key_false name
extern bool ____wrong_branch_error(void);
#define static_key_enabled(x) \