Messages in this thread | | | Date | Thu, 10 Jan 2008 03:37:01 +0100 | From | Andi Kleen <> | Subject | Re: uml and -regparm=3 |
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On Wed, Jan 09, 2008 at 09:14:04PM -0500, Jeff Dike wrote: > On Wed, Jan 09, 2008 at 10:50:48PM +0100, Miklos Szeredi wrote: > > > FASTCALL is useless and should not make a difference. It enables > > > regparm on specific functions, but that should not make a difference > > > if it works or not. > > > > __down_write() in include/asm-x86/rwsem.h seems to assume, that the > > semaphore pointer is passed in %eax down to rwsem_down_write_failed(), > > so regparm does make a difference there. > > And rwsem_down_write_failed seems to think it's getting the pointer in > %eax:
That's a left over from when it was called by magic inline assembly. I suspect it would be better to switch it just over to stack args for consistent and then declare it asmlinkage
-Andi
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