linux-kernel - [PATCH 2/3] mm: slub: parse slub_debug O option in switch statement

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Message-Id: <1423865980-10417-2-git-send-email-chris.j.arges@canonical.com>
Date:	Fri, 13 Feb 2015 16:19:36 -0600
From:	Chris J Arges <chris.j.arges@...onical.com>
To:	linux-kernel@...r.kernel.org
Cc:	Chris J Arges <chris.j.arges@...onical.com>,
	Christoph Lameter <cl@...ux.com>,
	Pekka Enberg <penberg@...nel.org>,
	David Rientjes <rientjes@...gle.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org
Subject: [PATCH 2/3] mm: slub: parse slub_debug O option in switch statement

By moving the O option detection into the switch statement, we allow this
parameter to be combined with other options correctly. Previously options like
slub_debug=OFZ would only detect the 'o' and use DEBUG_DEFAULT_FLAGS to fill
in the rest of the flags.

Signed-off-by: Chris J Arges <chris.j.arges@...onical.com>
---
 mm/slub.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/mm/slub.c b/mm/slub.c
index 06cdb18..88482f8 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1112,15 +1112,6 @@ static int __init setup_slub_debug(char *str)
 		 */
 		goto check_slabs;
 
-	if (tolower(*str) == 'o') {
-		/*
-		 * Avoid enabling debugging on caches if its minimum order
-		 * would increase as a result.
-		 */
-		disable_higher_order_debug = 1;
-		goto out;
-	}
-
 	slub_debug = 0;
 	if (*str == '-')
 		/*
@@ -1151,6 +1142,13 @@ static int __init setup_slub_debug(char *str)
 		case 'a':
 			slub_debug |= SLAB_FAILSLAB;
 			break;
+		case 'o':
+			/*
+			 * Avoid enabling debugging on caches if its minimum
+			 * order would increase as a result.
+			 */
+			disable_higher_order_debug = 1;
+			break;
 		default:
 			pr_err("slub_debug option '%c' unknown. skipped\n",
 			       *str);
-- 
1.9.1

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