[PATCH v4 08/30] x86/idle: Mark x86_idle static call as __ro_after_init

Valentin Schneider
2025-01-14T17:56:26Z

Later commits will cause objtool to warn about static calls being used in
.noinstr sections in order to safely defer instruction patching IPIs
targeted at NOHZ_FULL CPUs.

x86_idle is updated in:
o xen_set_default_idle() <- __init xen_arch_setup()
o __init select_idle_routine()

IOW purely init context, and can thus be marked as __ro_after_init.

Reported-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Valentin Schneider <vschneid@redhat.com>
---
arch/x86/kernel/process.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index f63f8fd00a91f..85cd62f61d633 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -746,7 +746,7 @@ void __cpuidle default_idle(void)
EXPORT_SYMBOL(default_idle);
#endif

-DEFINE_STATIC_CALL_NULL(x86_idle, default_idle);
+DEFINE_STATIC_CALL_NULL_RO(x86_idle, default_idle);

static bool x86_idle_set(void)
{
--
2.43.0