Re: [PATCH] fix flags length in net 9p

[Daniel Walker]

On Thu, 2008-05-01 at 14:19 -0700, Andrew Morton wrote:
> On Thu, 1 May 2008 17:08:05 -0400 (EDT)
> Steven Rostedt <rostedt@xxxxxxxxxxx> wrote:
> 
> > Some files in the net/9p directory uses "int" for flags. This can
> > cause hard to find bugs on some architectures. This patch converts the
> > flags to use "long" instead.
> 
> gargh.
> 
> > This bug was discovered by doing an allyesconfig make on the -rt kernel
> > where checks are done to ensure all flags are of size sizeof(long).
> 
> I was about to suggest that we do something like that...
> 
> I wonder how messy it is.  I long ago lost the ability to follow the
> convolutions in include/linux/spinlock*.h :(  gotta patch?

The check that's in -rt for this uses BUILD_BUG_ON(), and it's extremely
cryptic when there is a failure .. Most people will be baffled why the
build stopped. If a check went into mainline it should at least give you
some sort of idea what's happening ..

Daniel

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