* [PATCH] arm: oxnas: remove non-necessary flush_cache_all()
@ 2018-05-07 7:42 Jisheng Zhang
0 siblings, 0 replies; only message in thread
From: Jisheng Zhang @ 2018-05-07 7:42 UTC (permalink / raw)
To: Neil Armstrong; +Cc: Russell King, linux-arm-kernel, linux-oxnas, linux-kernel
I believe the flush_cache_all() after scu_enable() is to "Ensure that
the data accessed by CPU0 before the SCU was initialised is visible
to the other CPUs." as commented in scu_enable(). So flush_cache_all()
here is a duplication of the one in scu_enable(), remove it.
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
arch/arm/mach-oxnas/platsmp.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm/mach-oxnas/platsmp.c b/arch/arm/mach-oxnas/platsmp.c
index 442cc8a2f7dc..1a8e1e9fc222 100644
--- a/arch/arm/mach-oxnas/platsmp.c
+++ b/arch/arm/mach-oxnas/platsmp.c
@@ -85,7 +85,6 @@ static void __init ox820_smp_prepare_cpus(unsigned int max_cpus)
goto unmap_scu;
scu_enable(scu_base);
- flush_cache_all();
unmap_scu:
iounmap(scu_base);
--
2.17.0
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2018-05-07 7:42 [PATCH] arm: oxnas: remove non-necessary flush_cache_all() Jisheng Zhang
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