package/libdrm/0002-xf86atomic-require-CAS-support-in-libatomic_ops.patch

   1 From 7384f79f69fdb7b691cc5b0c28c301b3fe8b633e Mon Sep 17 00:00:00 2001
   2 From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
   3 Date: Thu, 26 May 2016 10:46:57 +0200
   4 Subject: [PATCH] xf86atomic: require CAS support in libatomic_ops
   5
   6 Since AO_compare_and_swap_full() is used by libdrm, AO_REQUIRE_CAS
   7 must be defined before including <atomic_ops.h> so that we are sure
   8 that CAS support will be provided. This is necessary to make sure that
   9 the AO_compare_and_swap_full() function will be provided on all
  10 architectures, including the ones that don't have built-in CAS support
  11 such as SPARCv8.
  12
  13 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  14 ---
  15  xf86atomic.h | 1 +
  16  1 file changed, 1 insertion(+)
  17
  18 diff --git a/xf86atomic.h b/xf86atomic.h
  19 index 922b37d..d7017a5 100644
  20 --- a/xf86atomic.h
  21 +++ b/xf86atomic.h
  22 @@ -58,6 +58,7 @@ typedef struct {
  23  #endif
  24
  25  #if HAVE_LIB_ATOMIC_OPS
  26 +#define AO_REQUIRE_CAS
  27  #include <atomic_ops.h>
  28
  29  #define HAS_ATOMIC_OPS 1
  30 --
  31 2.7.4
  32