x86,xen,objtool: Add UNWIND hint

SYM_CODE_START*() doesn't get auto-validated and needs an UNWIND hint to get checked, add one. vmlinux.o: warning: objtool: pvh_start_xen()+0x0: unreachable Reported-by: Thomas Gleixner <[email protected]> Reported-by: Rick Edgecombe <[email protected]> Signed-off-by: Peter Zijlstra (Intel) <[email protected]> Acked-by: Josh Poimboeuf <[email protected]> Link: https://lore.kernel.org/r/[email protected]
chewitt · Apr 19, 2022 · 2730d3c · 2730d3c
1 parent 226d44a
commit 2730d3c
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S
@@ -50,6 +50,7 @@
 #define PVH_DS_SEL		(PVH_GDT_ENTRY_DS * 8)
 
 SYM_CODE_START_LOCAL(pvh_start_xen)
+	UNWIND_HINT_EMPTY
 	cld
 
 	lgdt (_pa(gdt))