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[v2,16/28] ARM: module: Use RCU in all users of __module_text_address().

Message ID 20241220174731.514432-17-bigeasy@linutronix.de (mailing list archive)
State New
Headers show
Series module: Use RCU instead of RCU-sched. | expand

Commit Message

Sebastian Andrzej Siewior Dec. 20, 2024, 5:41 p.m. UTC 
__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>
---
 arch/arm/kernel/module-plts.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)
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Patch

diff --git a/arch/arm/kernel/module-plts.c b/arch/arm/kernel/module-plts.c
index da2ee8d6ef1a7..354ce16d83cb5 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;
 }