__module_address() can be invoked within a RCU section, there is no
requirement to have preemption disabled.
Replace the preempt_disable() section around __module_address() with
RCU.
Cc: Huacai Chen <chenhua...@kernel.org>
Cc: WANG Xuerui <ker...@xen0n.name>
Cc: loonga...@lists.linux.dev
Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
Signed-off-by: Sebastian Andrzej Siewior <bige...@linutronix.de>
---
arch/loongarch/kernel/unwind_orc.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/arch/loongarch/kernel/unwind_orc.c
b/arch/loongarch/kernel/unwind_orc.c
index b257228763317..d623935a75471 100644
--- a/arch/loongarch/kernel/unwind_orc.c
+++ b/arch/loongarch/kernel/unwind_orc.c
@@ -399,7 +399,7 @@ bool unwind_next_frame(struct unwind_state *state)
return false;
/* Don't let modules unload while we're reading their ORC data. */
- preempt_disable();
+ guard(rcu)();
if (is_entry_func(state->pc))
goto end;
@@ -514,14 +514,12 @@ bool unwind_next_frame(struct unwind_state *state)
if (!__kernel_text_address(state->pc))
goto err;
- preempt_enable();
return true;
err:
state->error = true;
end:
- preempt_enable();
state->stack_info.type = STACK_TYPE_UNKNOWN;
return false;
}
--
2.47.1
