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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2025-01-08 10:04:45 +0100
committerPetr Pavlu <petr.pavlu@suse.com>2025-03-10 11:54:45 +0100
commit59aa1414bf33bc706d6bc9c4dc2cd57b85862a4c (patch)
treeeef01ae733b20ebb1e9d99bef62f833d4df116ce
parentd593e0cabdf6428560f311af0657642979b2c8ad (diff)
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 <linux@armlinux.org.uk> Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20250108090457.512198-17-bigeasy@linutronix.de Signed-off-by: Petr Pavlu <petr.pavlu@suse.com>
-rw-r--r--arch/arm/kernel/module-plts.c4
1 files changed, 1 insertions, 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;
}