crc-t10dif: crc_t10dif_mutex can be static

Fixes: b7637754 ("crc-t10dif: Pick better transform if one becomes available")
Signed-off-by: Nkbuild test robot <fengguang.wu@intel.com>
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>

lib/crc-t10dif.c

@@ -20,7 +20,7 @@
 
 static struct crypto_shash __rcu *crct10dif_tfm;
 static struct static_key crct10dif_fallback __read_mostly;
-DEFINE_MUTEX(crc_t10dif_mutex);
+static DEFINE_MUTEX(crc_t10dif_mutex);
 
 static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data)
 {