Re: Why set ORIG_EAX(%esp) to -1 in arch/i386/kernel/entry.S:error_code?

[Linus Torvalds]

On Tue, 29 Aug 2006, Jeremy Fitzhardinge wrote:
>
> There doesn't seem much point; nothing seems to use it on the trap-handling
> paths.  Is it a historical left-over?

No. It's important that ORIG_EAX be set to some value that is _not_ a 
valid system call number, so that the system call restart logic (see the 
signal handling code) doesn't trigger.

		Linus
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