From: Yong Zhang <yong.zhang0@gmail.com>
To: linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: ralf@linux-mips.org, david.daney@cavium.com, tglx@linutronix.de
Subject: [PATCH -rt] MIPS: Octeon: convert smp_reserve_lock to raw spinlock
Date: Thu, 17 May 2012 18:15:09 +0800 [thread overview]
Message-ID: <1337249709-7346-1-git-send-email-yong.zhang0@gmail.com> (raw)
From: Yong Zhang <yong.zhang@windriver.com>
Because __cpu_disable is called in atomic context and spinlock
is a mutex on -rt.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
---
arch/mips/cavium-octeon/smp.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/mips/cavium-octeon/smp.c b/arch/mips/cavium-octeon/smp.c
index ef9c34a..473c72b 100644
--- a/arch/mips/cavium-octeon/smp.c
+++ b/arch/mips/cavium-octeon/smp.c
@@ -257,7 +257,7 @@ DEFINE_PER_CPU(int, cpu_state);
extern void fixup_irqs(void);
-static DEFINE_SPINLOCK(smp_reserve_lock);
+static DEFINE_RAW_SPINLOCK(smp_reserve_lock);
static int octeon_cpu_disable(void)
{
@@ -266,7 +266,7 @@ static int octeon_cpu_disable(void)
if (cpu == 0)
return -EBUSY;
- spin_lock(&smp_reserve_lock);
+ raw_spin_lock(&smp_reserve_lock);
set_cpu_online(cpu, false);
cpu_clear(cpu, cpu_callin_map);
@@ -277,7 +277,7 @@ static int octeon_cpu_disable(void)
flush_cache_all();
local_flush_tlb_all();
- spin_unlock(&smp_reserve_lock);
+ raw_spin_unlock(&smp_reserve_lock);
return 0;
}
--
1.7.1
next reply other threads:[~2012-05-17 10:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-17 10:15 Yong Zhang [this message]
2012-05-17 16:30 ` [PATCH -rt] MIPS: Octeon: convert smp_reserve_lock to raw spinlock David Daney
2012-05-17 20:50 ` Ralf Baechle
2012-05-18 2:29 ` Yong Zhang
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