On AMD (which is X86_FEATURE_K8), just the lfence is sufficient.
Signed-off-by: David Woodhouse <d...@amazon.co.uk>
---
arch/x86/lib/retpoline.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/lib/retpoline.S b/arch/x86/lib/retpoline.S
index 958d56f..d58f8f3 100644
--- a/arch/x86/lib/retpoline.S
+++ b/arch/x86/lib/retpoline.S
@@ -12,7 +12,7 @@
ENTRY(__x86.indirect_thunk.\reg)
CFI_STARTPROC
- ALTERNATIVE "call 2f", __stringify(jmp *%\reg), X86_BUG_NO_RETPOLINE
+ ALTERNATIVE_2 "call 2f", __stringify(lfence;jmp *%\reg),
X86_FEATURE_K8, __stringify(jmp *%\reg), X86_BUG_NO_RETPOLINE
1:
lfence
jmp 1b
--
2.7.4
