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From: "Mika Penttilä" <mika.penttila@kolumbus.fi>
To: Miquel van Smoorenburg <miquels@cistron.nl>
Cc: linux-kernel@vger.kernel.org
Subject: Re: /dev/root: which approach ? [PATCH]
Date: Wed, 10 Mar 2004 22:17:55 +0200	[thread overview]
Message-ID: <404F77F3.9070106@kolumbus.fi> (raw)
In-Reply-To: <20040310162003.GA25688@cistron.nl>


>My question to the FS hackers: which one is the preferred approach?
>
>
>dev_root_alias.patch
>
>--- linux-2.6.4-rc2-mm1.orig/fs/block_dev.c	2004-03-09 17:14:32.000000000 +0100
>+++ linux-2.6.4-rc2-mm1/fs/block_dev.c	2004-03-10 16:39:30.000000000 +0100
>@@ -338,6 +338,16 @@ struct block_device *bdget(dev_t dev)
> {
> 	struct block_device *bdev;
> 	struct inode *inode;
>+	struct vfsmount *mnt;
>+
>+	/* See if device is the /dev/root alias. */
>+	if (dev == MKDEV(4, 1)) {
>+		read_lock(&current->fs->lock);
>+		mnt = mntget(current->fs->rootmnt);
>+		dev = mnt->mnt_sb->s_dev;
>+		mntput(mnt);
>+		read_unlock(&current->fs->lock);
>+	}
> 
> 	inode = iget5_locked(bd_mnt->mnt_sb, hash(dev),
> 			bdev_test, bdev_set, &dev);
>  
>
what is this 4,1, a tty???

--Mika



  parent reply	other threads:[~2004-03-10 20:13 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-03-10 16:20 /dev/root: which approach ? [PATCH] Miquel van Smoorenburg
2004-03-10 20:01 ` Andrew Morton
2004-03-10 20:18   ` Miquel van Smoorenburg
2004-03-10 20:17 ` Mika Penttilä [this message]
2004-03-10 20:52   ` Miquel van Smoorenburg
2004-03-12  8:10     ` H. Peter Anvin
2004-03-10 21:01   ` Chris Wedgwood

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