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[v4,07/30] x86/paravirt: Mark pv_sched_clock static call as __ro_after_init

Message ID 20250114175143.81438-8-vschneid@redhat.com (mailing list archive)
State New
Headers show
Series context_tracking,x86: Defer some IPIs until a user->kernel transition | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

Valentin Schneider Jan. 14, 2025, 5:51 p.m. UTC 
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.

pv_sched_clock is updated in:
o __init vmware_paravirt_ops_setup()
o __init xen_init_time_common()
o kvm_sched_clock_init() <- __init kvmclock_init()
o hv_setup_sched_clock() <- __init hv_init_tsc_clocksource()

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/paravirt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/kernel/paravirt.c b/arch/x86/kernel/paravirt.c
index fec3815335558..ae6675167877b 100644
--- a/arch/x86/kernel/paravirt.c
+++ b/arch/x86/kernel/paravirt.c
@@ -73,7 +73,7 @@  static u64 native_steal_clock(int cpu)
 }
 
 DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
-DEFINE_STATIC_CALL(pv_sched_clock, native_sched_clock);
+DEFINE_STATIC_CALL_RO(pv_sched_clock, native_sched_clock);
 
 void paravirt_set_sched_clock(u64 (*func)(void))
 {