diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2025-01-08 10:04:47 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-03-13 17:20:30 +0100 |
| commit | 2e6949777d1dbfa5c906a880028680cc3ebe1f68 (patch) | |
| tree | 6a9a3e1518b12187ac55c5e8142f60202ce682ec | |
| parent | 4c2ca31608521895dd742a43beca4b4d29762345 (diff) | |
LoongArch/orc: Use RCU in all users of __module_address().
[ Upstream commit f99d27d9feb755aee9350fc89f57814d7e1b4880 ]
__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: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250108090457.512198-19-bigeasy@linutronix.de
Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
Stable-dep-of: 055c7e75190e ("LoongArch: Handle percpu handler address for ORC unwinder")
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | arch/loongarch/kernel/unwind_orc.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/loongarch/kernel/unwind_orc.c b/arch/loongarch/kernel/unwind_orc.c index 471652c0c865..59809c3406c0 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; } |