From fce3042f5576e52e4a2d02a7854401565419565f Mon Sep 17 00:00:00 2001
From: Dave Martin <Dave.Martin@arm.com>
Date: Thu, 3 Aug 2017 17:23:21 +0100
Subject: [PATCH] arm64: fpsimd: Consistently use __this_cpu_ ops where
appropriate
Git-commit: 504641859e5c616210c0894149e09fb6928e398f
Patch-mainline: v4.14-rc1
References: fate#325866
__this_cpu_ ops are not used consistently with regard to this_cpu_
ops in a couple of places in fpsimd.c.
Since preemption is explicitly disabled in
fpsimd_restore_current_state() and fpsimd_update_current_state(),
this patch converts this_cpu_ ops in those functions to __this_cpu_
ops. This doesn't save cost on arm64, but benefits from additional
assertions in the core code.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
arch/arm64/kernel/fpsimd.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index 62633cf04481..f108068b3166 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -198,7 +198,7 @@ void fpsimd_restore_current_state(void)
struct fpsimd_state *st = ¤t->thread.fpsimd_state;
fpsimd_load_state(st);
- this_cpu_write(fpsimd_last_state, st);
+ __this_cpu_write(fpsimd_last_state, st);
st->cpu = smp_processor_id();
}
preempt_enable();
@@ -218,7 +218,7 @@ void fpsimd_update_current_state(struct fpsimd_state *state)
if (test_and_clear_thread_flag(TIF_FOREIGN_FPSTATE)) {
struct fpsimd_state *st = ¤t->thread.fpsimd_state;
- this_cpu_write(fpsimd_last_state, st);
+ __this_cpu_write(fpsimd_last_state, st);
st->cpu = smp_processor_id();
}
preempt_enable();
--
2.11.0