From 59aa1414bf33bc706d6bc9c4dc2cd57b85862a4c Mon Sep 17 00:00:00 2001 From: Sebastian Andrzej Siewior Date: Wed, 8 Jan 2025 10:04:45 +0100 Subject: [PATCH] ARM: module: Use RCU in all users of __module_text_address(). __module_text_address() can be invoked within a RCU section, there is no requirement to have preemption disabled. Replace the preempt_disable() section around __module_text_address() with RCU. Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior Acked-by: Peter Zijlstra (Intel) Link: https://lore.kernel.org/r/20250108090457.512198-17-bigeasy@linutronix.de Signed-off-by: Petr Pavlu --- arch/arm/kernel/module-plts.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/arch/arm/kernel/module-plts.c b/arch/arm/kernel/module-plts.c index da2ee8d6ef1a..354ce16d83cb 100644 --- a/arch/arm/kernel/module-plts.c +++ b/arch/arm/kernel/module-plts.c @@ -285,11 +285,9 @@ bool in_module_plt(unsigned long loc) struct module *mod; bool ret; - preempt_disable(); + guard(rcu)(); mod = __module_text_address(loc); ret = mod && (loc - (u32)mod->arch.core.plt_ent < mod->arch.core.plt_count * PLT_ENT_SIZE || loc - (u32)mod->arch.init.plt_ent < mod->arch.init.plt_count * PLT_ENT_SIZE); - preempt_enable(); - return ret; } -- 2.49.0