[PATCH v3] char: nvram: Remove unused nvram_mutex to fix -Wunused-variable warning

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: Arnd Bergmann <arnd@arndb.de>
Suggested-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Venkat Rao Bagalkote <redacted>
---
v3:
 - Removed global nvram_mutex entirely

 drivers/char/nvram.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/char/nvram.c b/drivers/char/nvram.c
index 9eff426a9286..9ab2744cd375 100644
--- a/drivers/char/nvram.c
+++ b/drivers/char/nvram.c

@@ -53,7 +53,6 @@
 #include <asm/nvram.h>
 #endif
 
-static 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