[PATCH v2] char: nvram: Remove unused nvram_mutex to fix -Wunused-variable warning

[Venkat Rao Bagalkote]

v2:
  - Added missing Suggested-by tag from Ritesh Harjani (IBM)

drivers/char/nvram.c defines a static mutex 'nvram_mutex' which is never
used. This results in a compiler warning on linux-next builds:

  warning: 'nvram_mutex' defined but not used [-Wunused-variable]

Remove the unused definition to avoid the warning.

Suggested-by: Ritesh Harjani (IBM) <ritesh.list at gmail.com>
Signed-off-by: Venkat Rao Bagalkote <venkat88 at linux.ibm.com>
---
 drivers/char/nvram.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 9eff426a9286..2ce3307663ed 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c
@@ -53,7 +53,7 @@
 #include <asm/nvram.h>
 #endif
 
-static DEFINE_MUTEX(nvram_mutex);
+static __maybe_unused DEFINE_MUTEX(nvram_mutex);
 static DEFINE_SPINLOCK(nvram_state_lock);
 static int nvram_open_cnt;	/* #times opened */
 static int nvram_open_mode;	/* special open modes */
-- 
2.45.2