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Subject[tip:locking/core] locking/ww_mutex: Fix compilation of __WW_MUTEX_INITIALIZER
Commit-ID:  af2e859edd477fa1ea3d1d106f41a595cff3d162
Gitweb: http://git.kernel.org/tip/af2e859edd477fa1ea3d1d106f41a595cff3d162
Author: Chris Wilson <chris@chris-wilson.co.uk>
AuthorDate: Thu, 1 Dec 2016 11:47:04 +0000
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Sat, 14 Jan 2017 11:37:13 +0100

locking/ww_mutex: Fix compilation of __WW_MUTEX_INITIALIZER

From conflicting macro parameters, passing the wrong name to
__MUTEX_INITIALIZER and a stray '\', #define __WW_MUTEX_INITIALIZER was
very unhappy.

One unnecessary change was to choose to pass &ww_class instead of
implicitly taking the address of the class within the macro.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Maarten Lankhorst <maarten.lankhorst@canonical.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 1b375dc30710 ("mutex: Move ww_mutex definitions to ww_mutex.h")
Link: http://lkml.kernel.org/r/20161201114711.28697-2-chris@chris-wilson.co.uk
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
include/linux/ww_mutex.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/ww_mutex.h b/include/linux/ww_mutex.h
index c075285..083950f 100644
--- a/include/linux/ww_mutex.h
+++ b/include/linux/ww_mutex.h
@@ -51,10 +51,10 @@ struct ww_mutex {
};

#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# define __WW_CLASS_MUTEX_INITIALIZER(lockname, ww_class) \
- , .ww_class = &ww_class
+# define __WW_CLASS_MUTEX_INITIALIZER(lockname, class) \
+ , .ww_class = class
#else
-# define __WW_CLASS_MUTEX_INITIALIZER(lockname, ww_class)
+# define __WW_CLASS_MUTEX_INITIALIZER(lockname, class)
#endif

#define __WW_CLASS_INITIALIZER(ww_class) \
@@ -63,7 +63,7 @@ struct ww_mutex {
, .mutex_name = #ww_class "_mutex" }

#define __WW_MUTEX_INITIALIZER(lockname, class) \
- { .base = { \__MUTEX_INITIALIZER(lockname) } \
+ { .base = __MUTEX_INITIALIZER(lockname.base) \
__WW_CLASS_MUTEX_INITIALIZER(lockname, class) }

#define DEFINE_WW_CLASS(classname) \
\
 
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