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-rw-r--r--arch/arm/kernel/crunch.c13
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/arm/kernel/crunch.c b/arch/arm/kernel/crunch.c
index 99995c2..769abe1 100644
--- a/arch/arm/kernel/crunch.c
+++ b/arch/arm/kernel/crunch.c
@@ -31,7 +31,7 @@ void crunch_task_release(struct thread_info *thread)
static int crunch_enabled(u32 devcfg)
{
- return !!(devcfg & EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE);
+ return !!(devcfg & EP93XX_SYSCON_DEVCFG_CPENA);
}
static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
@@ -56,11 +56,16 @@ static int crunch_do(struct notifier_block *self, unsigned long cmd, void *t)
break;
case THREAD_NOTIFY_SWITCH:
- devcfg = __raw_readl(EP93XX_SYSCON_DEVICE_CONFIG);
+ devcfg = __raw_readl(EP93XX_SYSCON_DEVCFG);
if (crunch_enabled(devcfg) || crunch_owner == crunch_state) {
- devcfg ^= EP93XX_SYSCON_DEVICE_CONFIG_CRUNCH_ENABLE;
+ /*
+ * We don't use ep93xx_syscon_swlocked_write() here
+ * because we are on the context switch path and
+ * preemption is already disabled.
+ */
+ devcfg ^= EP93XX_SYSCON_DEVCFG_CPENA;
__raw_writel(0xaa, EP93XX_SYSCON_SWLOCK);
- __raw_writel(devcfg, EP93XX_SYSCON_DEVICE_CONFIG);
+ __raw_writel(devcfg, EP93XX_SYSCON_DEVCFG);
}
break;
}
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