Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [PATCH] compat: add compat functions for *at syscalls | Date | Tue, 7 Feb 2006 10:25:39 +0100 |
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On Tuesday 07 February 2006 01:01, David S. Miller wrote: > From: Stephen Rothwell <sfr@canb.auug.org.au> > Date: Tue, 7 Feb 2006 10:56:31 +1100 > > > This adds compat version of all the remaining *at syscalls > > so that the "dfd" arguments can be properly sign extended. > > > > Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> > > I do the sign extension with tiny stubs in arch/sparc64/kernel/sys32.S > so that the arg frobbing does not consume a stack frame, which is what > happens if you do this in C code.
To be honest - do you really think that matters? Even a Niagara will go through that in no time @)
And on x86-64 it should be as efficient as an equivalent assembly function.
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