Re: [PATCH] ppc64: Fix PER_LINUX32 behaviour

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Wed, 2005-06-08 at 10:24 -0700, Linus Torvalds wrote:
> 
> On Wed, 8 Jun 2005, Paul Mackerras wrote:
> > 
> > * uname(2) doesn't respect PER_LINUX32, it returns 'ppc64' instead of 'ppc'
> 
> I think this is a feature, not a bug, and I suspect you just broke
> compiling a 64-bit kernel by default on ppc64.
> 
> Dammit, the system _is_ ppc64. The fact that the uname binary is not is
> neither here nor there. It's like x86 that reports i386/i486/.. depending 
> on what the machine is. If uname wants to make it clear that uname has 
> been compiled for 32-bit ppc, then it can damn well output "ppc" on its 
> own without asking the kernel what the kernel is.

Unless I'm mistaken, 32 bits will still by default get ppc64, but this
allows us to explicitely use "linux32" binary to set personality to 32
bits, and have subprocesses of _that_ see a 32 bits uname result. That
allows dealing more easily with things like autocruft etc...

Ben.