bcache: replace printk() by pr_*() routines

There are still many places in bcache use printk to display kernel
message, which are suggested to be preplaced by pr_*() routines like
pr_err(), pr_info(), or pr_notice().

This patch replaces all printk() with a proper pr_*() routine for
bcache code.
Signed-off-by: Coly Li <colyli@suse.de>
Reviewed-by: Shenghui Wang <shhuiw@foxmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

drivers/md/bcache/bset.c

@@ -25,18 +25,18 @@ void bch_dump_bset(struct btree_keys *b, struct bset *i, unsigned int set)
 	for (k = i->start; k < bset_bkey_last(i); k = next) {
 		next = bkey_next(k);
 
-		printk(KERN_ERR "block %u key %u/%u: ", set,
+		pr_err("block %u key %u/%u: ", set,
 		       (unsigned int) ((u64 *) k - i->d), i->keys);
 
 		if (b->ops->key_dump)
 			b->ops->key_dump(b, k);
 		else
-			printk("%llu:%llu\n", KEY_INODE(k), KEY_OFFSET(k));
+			pr_err("%llu:%llu\n", KEY_INODE(k), KEY_OFFSET(k));
 
 		if (next < bset_bkey_last(i) &&
 		    bkey_cmp(k, b->ops->is_extents ?
 			     &START_KEY(next) : next) > 0)
-			printk(KERN_ERR "Key skipped backwards\n");
+			pr_err("Key skipped backwards\n");
 	}
 }
 
@@ -482,7 +482,7 @@ void inorder_test(void)
 		unsigned int i = 1, j = rounddown_pow_of_two(size - 1);
 
 		if (!(size % 4096))
-			printk(KERN_NOTICE "loop %u, %llu per us\n", size,
+			pr_notice("loop %u, %llu per us\n", size,
 			       done / ktime_us_delta(ktime_get(), start));
 
 		while (1) {

drivers/md/bcache/debug.c

@@ -74,28 +74,28 @@ void bch_btree_verify(struct btree *b)
 
 		console_lock();
 
-		printk(KERN_ERR "*** in memory:\n");
+		pr_err("*** in memory:\n");
 		bch_dump_bset(&b->keys, inmemory, 0);
 
-		printk(KERN_ERR "*** read back in:\n");
+		pr_err("*** read back in:\n");
 		bch_dump_bset(&v->keys, sorted, 0);
 
 		for_each_written_bset(b, ondisk, i) {
 			unsigned int block = ((void *) i - (void *) ondisk) /
 				block_bytes(b->c);
 
-			printk(KERN_ERR "*** on disk block %u:\n", block);
+			pr_err("*** on disk block %u:\n", block);
 			bch_dump_bset(&b->keys, i, block);
 		}
 
-		printk(KERN_ERR "*** block %zu not written\n",
+		pr_err("*** block %zu not written\n",
 		       ((void *) i - (void *) ondisk) / block_bytes(b->c));
 
 		for (j = 0; j < inmemory->keys; j++)
 			if (inmemory->d[j] != sorted->d[j])
 				break;
 
-		printk(KERN_ERR "b->written %u\n", b->written);
+		pr_err("b->written %u\n", b->written);
 
 		console_unlock();
 		panic("verify failed at %u\n", j);

drivers/md/bcache/extents.c

@@ -130,18 +130,18 @@ static void bch_bkey_dump(struct btree_keys *keys, const struct bkey *k)
 	char buf[80];
 
 	bch_extent_to_text(buf, sizeof(buf), k);
-	printk(" %s", buf);
+	pr_err(" %s", buf);
 
 	for (j = 0; j < KEY_PTRS(k); j++) {
 		size_t n = PTR_BUCKET_NR(b->c, k, j);
 
-		printk(" bucket %zu", n);
+		pr_err(" bucket %zu", n);
 		if (n >= b->c->sb.first_bucket && n < b->c->sb.nbuckets)
-			printk(" prio %i",
+			pr_err(" prio %i",
 			       PTR_BUCKET(b->c, k, j)->prio);
 	}
 
-	printk(" %s\n", bch_ptr_status(b->c, k));
+	pr_err(" %s\n", bch_ptr_status(b->c, k));
 }
 
 /* Btree ptrs */

drivers/md/bcache/super.c

@@ -1472,13 +1472,13 @@ bool bch_cache_set_error(struct cache_set *c, const char *fmt, ...)
 	acquire_console_sem();
 	*/
 
-	printk(KERN_ERR "bcache: error on %pU: ", c->sb.set_uuid);
+	pr_err("bcache: error on %pU: ", c->sb.set_uuid);
 
 	va_start(args, fmt);
 	vprintk(fmt, args);
 	va_end(args);
 
-	printk(", disabling caching\n");
+	pr_err(", disabling caching\n");
 
 	if (c->on_error == ON_ERROR_PANIC)
 		panic("panic forced after error\n");