linux-kernel - [PATCH 1/2] mm/cma_debug: fix debugging alloc/free interface

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Date:	Wed, 15 Jul 2015 15:35:28 +0900
From:	Joonsoo Kim <js1304@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Sasha Levin <sasha.levin@...cle.com>,
	Stefan Strogin <stefan.strogin@...il.com>,
	Michal Nazarewicz <mina86@...a86.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH 1/2] mm/cma_debug: fix debugging alloc/free interface

CMA has alloc/free interface for debugging. It is intended that alloc/free
occurs in specific CMA region, but, currently, alloc/free interface is
on root dir due to the bug so we can't select CMA region where alloc/free
happens.

This patch fixes this problem by making alloc/free interface per
CMA region.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
---
 mm/cma_debug.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/cma_debug.c b/mm/cma_debug.c
index 7621ee3..22190a7 100644
--- a/mm/cma_debug.c
+++ b/mm/cma_debug.c
@@ -170,10 +170,10 @@ static void cma_debugfs_add_one(struct cma *cma, int idx)
 
 	tmp = debugfs_create_dir(name, cma_debugfs_root);
 
-	debugfs_create_file("alloc", S_IWUSR, cma_debugfs_root, cma,
+	debugfs_create_file("alloc", S_IWUSR, tmp, cma,
 				&cma_alloc_fops);
 
-	debugfs_create_file("free", S_IWUSR, cma_debugfs_root, cma,
+	debugfs_create_file("free", S_IWUSR, tmp, cma,
 				&cma_free_fops);
 
 	debugfs_create_file("base_pfn", S_IRUGO, tmp,
-- 
1.9.1

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