linux-kernel - Re: [GIT pull] bkl core patches for 2.6.33

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Date:	Mon, 07 Dec 2009 13:46:42 -0800
From:	ebiederm@...ssion.com (Eric W. Biederman)
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [GIT pull] bkl core patches for 2.6.33

Thomas Gleixner <tglx@...utronix.de> writes:

> Linus,
>
> Please pull the latest bkl-core-for-linus git tree from:
>
>    git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git bkl-core-for-linus
>
> Thanks,


Was this tree in linux-next?  I'm certain I would have remembered the
conflict in kernel/sysctl.c.  Among other things in my sysctl tree
lock_kernel() is gone.  The removal of lock_kernel() happened to fall
out of my other changes.  I remember having a conversation with Arnd
Bergmann about this, and the conclusion being was that my change
correct and superior to this patch.  So I'm surprised a sysctl change
made it into your tree.

Eric


> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index 0d949c5..72040e5 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -1848,6 +1848,8 @@ int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *ol
>  			return -EFAULT;
>  	}
>  
> +	lock_kernel();
> +
>  	for (head = sysctl_head_next(NULL); head;
>  			head = sysctl_head_next(head)) {
>  		error = parse_table(name, nlen, oldval, oldlenp, 
> @@ -1858,6 +1860,8 @@ int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *ol
>  			break;
>  		}
>  	}
> +
> +	unlock_kernel();
>  	return error;
>  }
>  
> @@ -1873,10 +1877,8 @@ SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
>  	if (error)
>  		goto out;
>  
> -	lock_kernel();
>  	error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
>  			  tmp.newval, tmp.newlen);
> -	unlock_kernel();
>  out:
>  	return error;
>  }
> --
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