From: Tony Luck <tony.luck@intel.com>
Date: Wed, 16 May 2012 20:58:29 +0000 (-0700)
Subject: [IA64] Fix fast syscall version of getcpu()
X-Git-Tag: v3.5-rc1~121^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7411d89535ce803404678eaf7e2f7ce095cf46b2;p=pandora-kernel.git

[IA64] Fix fast syscall version of getcpu()

GETCPU(2) says:
  int getcpu(unsigned *cpu, unsigned *node, struct getcpu_cache *tcache);
  ...
  When either cpu or node is NULL nothing is written to the respective pointer.

But the fast system call path had no checks for NULL, and would
thus return -EFAULT if either (or both) of these were NULL.

Reported-by: Mike Frysinger <vapier@gentoo.org>
Tested-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>
---

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