slab: use __func__ to trace function name

It is better to use __func__ to trace function name.

Link: https://lkml.kernel.org/r/31fdbad5c45cd1e26be9ff37be321b8586b80fee.1624355507.git.gumingtao@xiaomi.comSigned-off-by: Ngumingtao <gumingtao@xiaomi.com>
Acked-by: NChristoph Lameter <cl@linux.com>
Acked-by: NDavid Rientjes <rientjes@google.com>
Reviewed-by: NAaron Tomlin <atomlin@redhat.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/slab_common.c

@@ -377,11 +377,11 @@ kmem_cache_create_usercopy(const char *name,
 
 	if (err) {
 		if (flags & SLAB_PANIC)
-			panic("kmem_cache_create: Failed to create slab '%s'. Error %d\n",
-				name, err);
+			panic("%s: Failed to create slab '%s'. Error %d\n",
+				__func__, name, err);
 		else {
-			pr_warn("kmem_cache_create(%s) failed with error %d\n",
-				name, err);
+			pr_warn("%s(%s) failed with error %d\n",
+				__func__, name, err);
 			dump_stack();
 		}
 		return NULL;
@@ -508,8 +508,8 @@ void kmem_cache_destroy(struct kmem_cache *s)
 
 	err = shutdown_cache(s);
 	if (err) {
-		pr_err("kmem_cache_destroy %s: Slab cache still has objects\n",
-		       s->name);
+		pr_err("%s %s: Slab cache still has objects\n",
+		       __func__, s->name);
 		dump_stack();
 	}
 out_unlock: