linux-kernel - Re: [PATCH] Remove BKL usage from ncpfs

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Date:	Mon, 27 Sep 2010 16:16:41 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	Petr Vandrovec <petr@...drovec.name>
Cc:	linux-fsdevel@...r.kernel.org, aia21@....ac.uk,
	linux-kernel@...r.kernel.org, viro@...iv.linux.org.uk
Subject: Re: [PATCH] Remove BKL usage from ncpfs

On Monday 27 September 2010, Petr Vandrovec wrote:
> commit 92498b5267aa58e85e20c7b2cbd84d1ed86df47d
> Author: Petr Vandrovec <petr@...drovec.name>
> Date:   Sun Sep 26 16:19:12 2010 -0700
> 
>     Remove BKL from ncpfs

Hi Petr,

Thanks for taking care of this.

Would you like me to take this patch into my bkl/vfs tree? I think
that would make it easier for me because I'm adding another instance
of the BKL there, in the ncp_fill_super function. As far as I can tell
that change (see below) becomes pointless with your patch.

I could either just revert my change or replace it with your patch,
whichever you prefer.

	Arnd

diff --git a/fs/ncpfs/inode.c b/fs/ncpfs/inode.c
index b4de38c..cdf0fce 100644
--- a/fs/ncpfs/inode.c
+++ b/fs/ncpfs/inode.c
@@ -445,10 +445,14 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
 #endif
        struct ncp_entry_info finfo;
 
+       lock_kernel();
+
        data.wdog_pid = NULL;
        server = kzalloc(sizeof(struct ncp_server), GFP_KERNEL);
-       if (!server)
+       if (!server) {
+               unlock_kernel();
                return -ENOMEM;
+       }
        sb->s_fs_info = server;
 
        error = -EFAULT;
@@ -700,6 +704,7 @@ static int ncp_fill_super(struct super_block *sb, void *raw_data, int silent)
         if (!sb->s_root)
                goto out_no_root;
        sb->s_root->d_op = &ncp_root_dentry_operations;
+       unlock_kernel();
        return 0;
 
 out_no_root:
@@ -736,6 +741,7 @@ out:
        put_pid(data.wdog_pid);
        sb->s_fs_info = NULL;
        kfree(server);
+       unlock_kernel();
        return error;
 }
 

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