linux-kernel - Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 (Was: Re: Cannot format floppies under kernel 2.6.*?)

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Date:	Fri, 18 Dec 2009 07:22:02 -0800 (PST)
From:	Linus Torvalds <torvalds@...ux-foundation.org>
To:	Mark Hounschell <dmarkh@....rr.com>
cc:	Alain Knaff <alain@...ff.lu>, Mark Hounschell <markh@...pro.net>,
	linux-kernel@...r.kernel.org, fdutils@...tils.linux.lu
Subject: Re: [Fdutils] DMA cache consistency bug introduced in 2.6.28 (Was:
 Re: Cannot format floppies under kernel 2.6.*?)



On Fri, 18 Dec 2009, Mark Hounschell wrote:
> 
> This one doesn't build:
> 
> CC [M]  fs/ext3/super.o
> fs/ext3/super.c: In function ‘ext3_quota_on’:
> fs/ext3/super.c:2839: error: ‘nd’ undeclared (first use in this function)
> fs/ext3/super.c:2839: error: (Each undeclared identifier is reported only once
> fs/ext3/super.c:2839: error: for each function it appears in.)
> make[2]: *** [fs/ext3/super.o] Error 1
> make[1]: *** [fs/ext3] Error 2
> make: *** [fs] Error 2
> 
> I haven't yet determined that I can but, if I were to make a modification to the
> tree now to fix this would that screw up the bisect process?

You can safely fix unrelated problems without screwing up the bisection. 
And in this case you can be pretty sure that this is unrelated, so it's 
all ok.

The fix for that silly problem is

-                       path_put(&nd.path);
+                       path_put(&path);

(it's due to a silent merge failure - it merged cleanly, but semantics had 
changed in a branch and impacted code that was newly introduced in another 
branch).


		Linus
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