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Subject[tip: x86/urgent] x86,xen,objtool: Add UNWIND hint
The following commit has been merged into the x86/urgent branch of tip:

Commit-ID: 2730d3c14a85617c177337f2e2af2108bf82c4ca
Gitweb: https://git.kernel.org/tip/2730d3c14a85617c177337f2e2af2108bf82c4ca
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Fri, 08 Apr 2022 11:45:54 +02:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Tue, 19 Apr 2022 21:58:47 +02:00

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 <tglx@linutronix.de>
Reported-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220408094718.321246297@infradead.org
---
arch/x86/platform/pvh/head.S | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S
index 72c1e42..7fe564e 100644
--- 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))
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