diff options
Diffstat (limited to 'meta/recipes-core/glibc/glibc/0006-nativesdk-glibc-Allow-64-bit-atomics-for-x86.patch')
| -rw-r--r-- | meta/recipes-core/glibc/glibc/0006-nativesdk-glibc-Allow-64-bit-atomics-for-x86.patch | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/meta/recipes-core/glibc/glibc/0006-nativesdk-glibc-Allow-64-bit-atomics-for-x86.patch b/meta/recipes-core/glibc/glibc/0006-nativesdk-glibc-Allow-64-bit-atomics-for-x86.patch new file mode 100644 index 0000000000..3a37f7af72 --- /dev/null +++ b/meta/recipes-core/glibc/glibc/0006-nativesdk-glibc-Allow-64-bit-atomics-for-x86.patch @@ -0,0 +1,39 @@ +From b30f380cd88ae181a4a6a3a4784206ffe3ccd19b Mon Sep 17 00:00:00 2001 +From: Khem Raj <raj.khem@gmail.com> +Date: Thu, 31 Dec 2015 14:35:35 -0800 +Subject: [PATCH] nativesdk-glibc: Allow 64 bit atomics for x86 + +The fix consist of allowing 64bit atomic ops for x86. +This should be safe for i586 and newer CPUs. +It also makes the synchronization more efficient. + +Upstream-Status: Inappropriate [OE-Specific] + +Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> +Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> +Signed-off-by: Khem Raj <raj.khem@gmail.com> +--- + sysdeps/x86/atomic-machine.h | 3 +-- + 1 file changed, 1 insertion(+), 2 deletions(-) + +diff --git a/sysdeps/x86/atomic-machine.h b/sysdeps/x86/atomic-machine.h +index 695222e4fa..9d39bfdbd5 100644 +--- a/sysdeps/x86/atomic-machine.h ++++ b/sysdeps/x86/atomic-machine.h +@@ -52,15 +52,14 @@ typedef uintmax_t uatomic_max_t; + #define LOCK_PREFIX "lock;" + + #define USE_ATOMIC_COMPILER_BUILTINS 1 ++# define __HAVE_64B_ATOMICS 1 + + #ifdef __x86_64__ +-# define __HAVE_64B_ATOMICS 1 + # define SP_REG "rsp" + # define SEG_REG "fs" + # define BR_CONSTRAINT "q" + # define IBR_CONSTRAINT "iq" + #else +-# define __HAVE_64B_ATOMICS 0 + # define SP_REG "esp" + # define SEG_REG "gs" + # define BR_CONSTRAINT "r" |