linux-kernel - [PATCH] x86/intel_rdt: use __this_cpu_read in pseudo_lock

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Date:   Fri, 23 Jul 2021 10:33:42 +0800
From:   Hui Su <suhui@...u.com>
To:     fenghua.yu@...el.com, reinette.chatre@...el.com,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, x86@...nel.org,
        hpa@...or.com, linux-kernel@...r.kernel.org
Cc:     Hui Su <suhui@...u.com>
Subject: [PATCH] x86/intel_rdt: use __this_cpu_read in pseudo_lock_fn()

The code is executed with interrupts disabled,
so it's safe to use __this_cpu_read().

Signed-off-by: Hui Su <suhui@...u.com>
---
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
index 2207916cae65..f0cc0a89333b 100644
--- a/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
+++ b/arch/x86/kernel/cpu/resctrl/pseudo_lock.c
@@ -464,8 +464,8 @@ static int pseudo_lock_fn(void *_rdtgrp)
 	 * cache.
 	 */
 	__wrmsr(MSR_MISC_FEATURE_CONTROL, prefetch_disable_bits, 0x0);
-	closid_p = this_cpu_read(pqr_state.cur_closid);
-	rmid_p = this_cpu_read(pqr_state.cur_rmid);
+	closid_p = __this_cpu_read(pqr_state.cur_closid);
+	rmid_p = __this_cpu_read(pqr_state.cur_rmid);
 	mem_r = plr->kmem;
 	size = plr->size;
 	line_size = plr->line_size;
-- 
2.30.2