ceph: Use generic debugging facility

The dout macro duplicates the generic features of pr_debug with
__FILE__ and __func__ output capability when using dynamic_debug.

Convert dout to pr_debug and remove the "pretty" print feature
of dout.

Miscellanea:

o Realign arguments

Signed-off-by: Joe Perches <joe@perches.com>

fs/ceph/cache.c

@@ -125,7 +125,7 @@ static enum fscache_checkaux ceph_fscache_inode_check_aux(
 	if (memcmp(data, &aux, sizeof(aux)) != 0)
 		return FSCACHE_CHECKAUX_OBSOLETE;
 
-	dout("ceph inode 0x%p cached okay\n", ci);
+	pr_debug("ceph inode 0x%p cached okay\n", ci);
 	return FSCACHE_CHECKAUX_OKAY;
 }
 
@@ -191,16 +191,16 @@ void ceph_fscache_file_set_cookie(struct inode *inode, struct file *filp)
 		return;
 
 	if (inode_is_open_for_write(inode)) {
-		dout("fscache_file_set_cookie %p %p disabling cache\n",
-		     inode, filp);
+		pr_debug("fscache_file_set_cookie %p %p disabling cache\n",
+			 inode, filp);
 		fscache_disable_cookie(ci->fscache, &ci->i_vino, false);
 		fscache_uncache_all_inode_pages(ci->fscache, inode);
 	} else {
 		fscache_enable_cookie(ci->fscache, &ci->i_vino, i_size_read(inode),
 				      ceph_fscache_can_enable, inode);
 		if (fscache_cookie_enabled(ci->fscache)) {
-			dout("fscache_file_set_cookie %p %p enabling cache\n",
-			     inode, filp);
+			pr_debug("fscache_file_set_cookie %p %p enabling cache\n",
+				 inode, filp);
 		}
 	}
 }
@@ -238,14 +238,14 @@ int ceph_readpage_from_fscache(struct inode *inode, struct page *page)
 
 	switch (ret) {
 		case 0: /* Page found */
-			dout("page read submitted\n");
+			pr_debug("page read submitted\n");
 			return 0;
 		case -ENOBUFS: /* Pages were not found, and can't be */
 		case -ENODATA: /* Pages were not found */
-			dout("page/inode not in cache\n");
+			pr_debug("page/inode not in cache\n");
 			return ret;
 		default:
-			dout("%s: unknown error ret = %i\n", __func__, ret);
+			pr_debug("%s: unknown error ret = %i\n", __func__, ret);
 			return ret;
 	}
 }
@@ -267,14 +267,14 @@ int ceph_readpages_from_fscache(struct inode *inode,
 
 	switch (ret) {
 		case 0: /* All pages found */
-			dout("all-page read submitted\n");
+			pr_debug("all-page read submitted\n");
 			return 0;
 		case -ENOBUFS: /* Some pages were not found, and can't be */
 		case -ENODATA: /* some pages were not found */
-			dout("page/inode not in cache\n");
+			pr_debug("page/inode not in cache\n");
 			return ret;
 		default:
-			dout("%s: unknown error ret = %i\n", __func__, ret);
+			pr_debug("%s: unknown error ret = %i\n", __func__, ret);
 			return ret;
 	}
 }