Re: [PATCH] Start of compat32.h (again)

[David Mosberger]

>>>>> On Wed, 27 Nov 2002 09:29:18 +0100, Andi Kleen <[e-mail]> said:

  Andi> But the 32bit user space surely doesn't care about any garbage
  Andi> in the upper 32bits, no ?

The user-space won't, but the kernel exit path might.  Remember that
most compatibility syscalls go straight to the 64-bit syscall
handlers.  You're probably hosed anyhow if a 64-bit syscall returns,
say, 0x1ffffffff, but on ia64 I'd still rather play it safe and
consistently have all compatibility syscalls return a 64-bit
sign-extended value like all other syscall handlers ("least surprise"
principle).

	--david