Re: gcc-4.2.0 20070316 (prerelease) miscompiles sparc64 kernel

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From: Mikael Pettersson <mikpe@xxxxxxxx>
Date: Wed, 4 Apr 2007 09:23:07 +0200 (MEST)

> The 2.6.21-rc5 kernel compiled with gcc-4.2.0 20070316 boots ok
> but is thrown into an infinite loop by `hdparm -Tt /dev/hda'.
> Sysrq-P tells me that the call chain in the loop is:
> 
> __up_read or __handle_mm_fault [varies]
> do_sparc64_fault
> sparc64_realfault_common
> compat_sys_shmat
> 
> The kernel works when built with gcc-3.4.6, 4.0.4, or 4.1.2.
> 
> I'll do some more debugging next week, if I have time.

Any updates?
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