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SubjectRe: [patch] scheduler bugfix, SMP, 2.4.0-test7
   Date: Tue, 29 Aug 2000 16:13:22 +0100 (BST)
From: Alan Cox <alan@lxorguk.ukuu.org.uk>

> Ingo, the local flags stuff on Sparc, remember?

Maybe its time to have FASTCALLFLAGS that is different for sparc ?

The problem not FASTCALL, which is a NOP on sparc anyways. The
problem is the fact that people expect the following to work:

void foo(unsigned long flags)
{
restore_flags(flags);
}

void bar(void)
{
unsigned long flags;

save_flags(flags);
foo(flags);
}

And it doesn't on Sparc because the flags are stored in the same CPU
register as the current register window.

Therefore you cannot restore irq flags in a different function than
the one in which you obtained them.

Later,
David S. Miller
davem@redhat.com
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