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| author | Andi Kleen <ak@linux.intel.com> | 2013-10-22 09:07:57 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-01-29 22:17:17 -0800 |
| commit | dff38e3e93bbc10653a232f68077e5d031624464 (patch) | |
| tree | 084ea355a1f7d84e3d1a33759e3105ff116e2d28 /arch/x86/xen/spinlock.c | |
| parent | a2e7f0e3a4f0f23fe4cd8cc22da547872f0170bb (diff) | |
| download | linux-stable-dff38e3e93bbc10653a232f68077e5d031624464.tar.gz linux-stable-dff38e3e93bbc10653a232f68077e5d031624464.tar.bz2 linux-stable-dff38e3e93bbc10653a232f68077e5d031624464.zip | |
x86: Use inline assembler instead of global register variable to get sp
LTO in gcc 4.6/47. has trouble with global register variables. They were used
to read the stack pointer. Use a simple inline assembler statement with
a mov instead.
This also helps LLVM/clang, which does not support global register
variables.
[ hpa: Ideally this should become a builtin in both gcc and clang. ]
v2: More general asm constraint. Fix description (Jan Beulich)
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/1382458079-24450-6-git-send-email-andi@firstfloor.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/xen/spinlock.c')
0 files changed, 0 insertions, 0 deletions