Commit f99d27d9 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Petr Pavlu
Browse files

LoongArch/orc: Use RCU in all users of __module_address(). 



__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 <chenhuacai@kernel.org>
Cc: WANG Xuerui <kernel@xen0n.name>
Cc: loongarch@lists.linux.dev
Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250108090457.512198-19-bigeasy@linutronix.de


Signed-off-by: default avatarPetr Pavlu <petr.pavlu@suse.com>
parent 17a9992d

arch/loongarch/kernel/unwind_orc.c

+1 −3
Original line number Diff line number Diff line
@@ -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;

}