Commit 59aa1414 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Petr Pavlu
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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: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/20250108090457.512198-17-bigeasy@linutronix.de


Signed-off-by: default avatarPetr Pavlu <petr.pavlu@suse.com>
parent d593e0ca

arch/arm/kernel/module-plts.c

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

}