linux-kernel - [PATCH] Free the temporary vfsmount created in bdev_cache

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Message-ID: <20090401110703.12974.99902.stgit@pc1117.cambridge.arm.com>
Date:	Wed, 01 Apr 2009 12:07:37 +0100
From:	Catalin Marinas <catalin.marinas@....com>
To:	linux-kernel@...r.kernel.org
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Cheng Renquan <crquan@...il.com>
Subject: [PATCH] Free the temporary vfsmount created in bdev_cache_init()

The vfsmount structure allocated in this function (the bd_mnt local
variable) is only used to obtain the blockdev_superblock and there are
no other references to it. This structure can be safely freed (and
prevent kmemleak from reporting it).

Signed-off-by: Catalin Marinas <catalin.marinas@....com>
Acked-by: Cheng Renquan <crquan@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
---

This patch was submitted and acked some time ago but I don't think it
made it into the kernel. Here it is again. Thanks.

 fs/block_dev.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/block_dev.c b/fs/block_dev.c
index 8c3c689..e7a332f 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -492,6 +492,7 @@ void __init bdev_cache_init(void)
 	if (IS_ERR(bd_mnt))
 		panic("Cannot create bdev pseudo-fs");
 	blockdev_superblock = bd_mnt->mnt_sb;	/* For writeback */
+	free_vfsmnt(bd_mnt);
 }
 
 /*

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