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-rw-r--r--arch/arm/vfp/vfpmodule.c9
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index 0797cb528b46..bbf3da012afd 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -153,7 +153,7 @@ static struct notifier_block vfp_notifier_block = {
* Raise a SIGFPE for the current process.
* sicode describes the signal being raised.
*/
-void vfp_raise_sigfpe(unsigned int sicode, struct pt_regs *regs)
+static void vfp_raise_sigfpe(unsigned int sicode, struct pt_regs *regs)
{
siginfo_t info;
@@ -489,8 +489,11 @@ void vfp_flush_hwstate(struct thread_info *thread)
/*
* VFP hardware can lose all context when a CPU goes offline.
- * Safely clear our held state when a CPU has been killed, and
- * re-enable access to VFP when the CPU comes back online.
+ * As we will be running in SMP mode with CPU hotplug, we will save the
+ * hardware state at every thread switch. We clear our held state when
+ * a CPU has been killed, indicating that the VFP hardware doesn't contain
+ * a threads VFP state. When a CPU starts up, we re-enable access to the
+ * VFP hardware.
*
* Both CPU_DYING and CPU_STARTING are called on the CPU which
* is being offlined/onlined.