[PATCH v2 09/10] x86: Annotate dynamic jump in head_64.S

[Peter Zijlstra]

The objtool retpoline validation found this indirect jump. Seeing how
its on CPU bringup before we run userspace it should be safe, annotate
it.

Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
---
 arch/x86/kernel/head_64.S |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -134,7 +134,10 @@ ENTRY(secondary_startup_64)
 
 	/* Ensure I am executing from virtual addresses */
 	movq	$1f, %rax
-	jmp	*%rax
+2:	jmp	*%rax
+	.pushsection .discard.retpoline_safe
+	.quad 2b
+	.popsection
 1:
 	UNWIND_HINT_EMPTY