[PATCH v3 0/2] x86_64: Sigcontext improvements

[Andy Lutomirski <luto@kernel.org>]

Patch 1 is IMO a bug fix.

Patch 2 is a cleanup and avoids some confusion.  It's also sort of an
API break (no ABI change) because it removes a struct field.  But that
struct field has never done anything at all as far as I can tell.

AFAICT this series got bogged down in discussion about patch 2 last
time.  I'm only including patch 2 for completeness here -- patch 1
is IMO far more useful, and I'm fine with patch 1 being merged and
tabling patch 2 again.

Changes from v1:
 - Add the __USER_DS fix, caught by my sigreturn test.
 - Re-tested locally.

Changes from 2:
 - Fixed comment style in patch 1.
 - Added a better comment in patch 2.

Andy Lutomirski (2):
  x86_64,signal: Fix SS handling for signals delivered to 64-bit
    programs
  x86_64,signal: Remove 'fs' and 'gs' from sigcontext

 arch/x86/include/asm/sigcontext.h      |  6 +++---
 arch/x86/include/uapi/asm/sigcontext.h | 21 ++++++++++++++++++---
 arch/x86/kernel/signal.c               | 26 +++++++++++++++-----------
 3 files changed, 36 insertions(+), 17 deletions(-)

-- 
2.3.0