The following commit has been merged into the objtool/core branch of tip:
Commit-ID: a02f50b573b3c90a3633a5ab67435fe4c0de144d
Gitweb: https://git.kernel.org/tip/a02f50b573b3c90a3633a5ab67435fe4c0de144d
Author: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
AuthorDate: Mon, 13 Feb 2023 23:05:51 -08:00
Committer: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
CommitterDate: Wed, 08 Mar 2023 08:44:26 -08:00
x86/cpu: Make sure play_dead() doesn't return
After commit 076cbf5d2163 ("x86/xen: don't let xen_pv_play_dead()
return"), play_dead() never returns. Make that more explicit with a
BUG().
BUG() is preferable to unreachable() because BUG() is a more explicit
failure mode and avoids undefined behavior like falling off the edge of
the function into whatever code happens to be next.
Link: https://lore.kernel.org/r/11e6ac1cf10f92967882926e3ac16287b50642f2.1676358308.git.jpoimboe@xxxxxxxxxx
Signed-off-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
---
arch/x86/include/asm/smp.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index b4dbb20..8f628e0 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -96,6 +96,7 @@ static inline void __cpu_die(unsigned int cpu)
static inline void play_dead(void)
{
smp_ops.play_dead();
+ BUG();
}
static inline void smp_send_reschedule(int cpu)
|