diff mbox series

[v4,14/30] perf/x86/amd: Mark perf_lopwr_cb static call as __ro_after_init

Message ID 20250114175143.81438-15-vschneid@redhat.com (mailing list archive)
State New
Headers show
Series context_tracking,x86: Defer some IPIs until a user->kernel transition | expand

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.

perf_lopwr_cb is used in .noinstr code, but is only ever updated in __init
amd_brs_lopwr_init(), 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/events/amd/brs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/x86/events/amd/brs.c b/arch/x86/events/amd/brs.c
index 780acd3dff22a..e2ff03af15d82 100644
--- a/arch/x86/events/amd/brs.c
+++ b/arch/x86/events/amd/brs.c
@@ -422,7 +422,7 @@  void noinstr perf_amd_brs_lopwr_cb(bool lopwr_in)
 	}
 }
 
-DEFINE_STATIC_CALL_NULL(perf_lopwr_cb, perf_amd_brs_lopwr_cb);
+DEFINE_STATIC_CALL_NULL_RO(perf_lopwr_cb, perf_amd_brs_lopwr_cb);
 EXPORT_STATIC_CALL_TRAMP_GPL(perf_lopwr_cb);
 
 void __init amd_brs_lopwr_init(void)