From: Linus Torvalds <torvalds@linux-foundation.org>
Date: Sun, 23 Nov 2014 21:56:55 +0000 (-0800)
Subject: Merge branch 'x86-traps' (trap handling from Andy Lutomirski)
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=00c89b2f1111b61e924f49fc79b7d9851fce249d;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

Merge branch 'x86-traps' (trap handling from Andy Lutomirski)

Merge x86-64 iret fixes from Andy Lutomirski:
 "This addresses the following issues:

   - an unrecoverable double-fault triggerable with modify_ldt.
   - invalid stack usage in espfix64 failed IRET recovery from IST
     context.
   - invalid stack usage in non-espfix64 failed IRET recovery from IST
     context.

  It also makes a good but IMO scary change: non-espfix64 failed IRET
  will now report the correct error.  Hopefully nothing depended on the
  old incorrect behavior, but maybe Wine will get confused in some
  obscure corner case"

* emailed patches from Andy Lutomirski <luto@amacapital.net>:
  x86_64, traps: Rework bad_iret
  x86_64, traps: Stop using IST for #SS
  x86_64, traps: Fix the espfix64 #DF fixup and rewrite it in C
---

00c89b2f1111b61e924f49fc79b7d9851fce249d