fs/fscache: convert printk to pr_foo()

All printk converted to pr_foo() except internal.h: printk(KERN_DEBUG

Coalesce formats.

Add pr_fmt

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index 29d7feb..aec01be 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -519,7 +519,7 @@
 	ASSERTCMP(atomic_read(&cookie->n_active), >, 0);
 
 	if (atomic_read(&cookie->n_children) != 0) {
-		printk(KERN_ERR "FS-Cache: Cookie '%s' still has children\n",
+		pr_err("Cookie '%s' still has children\n",
 		       cookie->def->name);
 		BUG();
 	}