linux-kernel - [PATCH] init/do_mounts: Add create

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Date:	Mon, 25 May 2015 10:47:50 +0530
From:	Vishnu Pratap Singh <vishnu.ps@...sung.com>
To:	paul.gortmaker@...driver.com, snitzer@...hat.com,
	dehrenberg@...omium.org, pavel@....cz, akpm@...ux-foundation.org,
	mszeredi@...e.cz, linux-kernel@...r.kernel.org
Cc:	cpgs@...sung.com, Vishnu Pratap Singh <vishnu.ps@...sung.com>
Subject: [PATCH] init/do_mounts: Add create_dev() failure log

if create_dev() function fails to create the root mount device (/dev/root),
then it goes to panic as root device not found but there is no check/log
present in case of failure, So i have added the log in case it fails to create
the root device. It will help in debugging.

Signed-off-by: Vishnu Pratap Singh <vishnu.ps@...sung.com>
---
 init/do_mounts.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/init/do_mounts.c b/init/do_mounts.c
index 8369ffa..a68aaf6 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -532,7 +532,8 @@ void __init mount_root(void)
 	}
 #endif
 #ifdef CONFIG_BLOCK
-	create_dev("/dev/root", ROOT_DEV);
+	if(create_dev("/dev/root", ROOT_DEV) < 0)
+		printk(KERN_ERR "Failed to create %s device !!\n", "/dev/root");
 	mount_block_root("/dev/root", root_mountflags);
 #endif
 }
-- 
1.7.9.5

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