#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/prom.h>
+#include <asm/machdep.h>
#ifdef CONFIG_PPC64
#include <asm/firmware.h>
#include <asm/time.h>
-#include <asm/machdep.h>
#endif
extern unsigned long _get_SP(void);
}
#endif /* CONFIG_SPE */
+/*
+ * If we are doing lazy switching of CPU state (FP, altivec or SPE),
+ * and the current task has some state, discard it.
+ */
+static inline void discard_lazy_cpu_state(void)
+{
+#ifndef CONFIG_SMP
+ preempt_disable();
+ if (last_task_used_math == current)
+ last_task_used_math = NULL;
+#ifdef CONFIG_ALTIVEC
+ if (last_task_used_altivec == current)
+ last_task_used_altivec = NULL;
+#endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_SPE
+ if (last_task_used_spe == current)
+ last_task_used_spe = NULL;
+#endif
+ preempt_enable();
+#endif /* CONFIG_SMP */
+}
+
int set_dabr(unsigned long dabr)
{
-#ifdef CONFIG_PPC64
if (ppc_md.set_dabr)
return ppc_md.set_dabr(dabr);
-#endif
mtspr(SPRN_DABR, dabr);
return 0;
void exit_thread(void)
{
kprobe_flush_task(current);
-
-#ifndef CONFIG_SMP
- if (last_task_used_math == current)
- last_task_used_math = NULL;
-#ifdef CONFIG_ALTIVEC
- if (last_task_used_altivec == current)
- last_task_used_altivec = NULL;
-#endif /* CONFIG_ALTIVEC */
-#ifdef CONFIG_SPE
- if (last_task_used_spe == current)
- last_task_used_spe = NULL;
-#endif
-#endif /* CONFIG_SMP */
+ discard_lazy_cpu_state();
}
void flush_thread(void)
if (t->flags & _TIF_ABI_PENDING)
t->flags ^= (_TIF_ABI_PENDING | _TIF_32BIT);
#endif
- kprobe_flush_task(current);
-#ifndef CONFIG_SMP
- if (last_task_used_math == current)
- last_task_used_math = NULL;
-#ifdef CONFIG_ALTIVEC
- if (last_task_used_altivec == current)
- last_task_used_altivec = NULL;
-#endif /* CONFIG_ALTIVEC */
-#ifdef CONFIG_SPE
- if (last_task_used_spe == current)
- last_task_used_spe = NULL;
-#endif
-#endif /* CONFIG_SMP */
+ discard_lazy_cpu_state();
#ifdef CONFIG_PPC64 /* for now */
if (current->thread.dabr) {
}
#endif
-#ifndef CONFIG_SMP
- if (last_task_used_math == current)
- last_task_used_math = NULL;
-#ifdef CONFIG_ALTIVEC
- if (last_task_used_altivec == current)
- last_task_used_altivec = NULL;
-#endif
-#ifdef CONFIG_SPE
- if (last_task_used_spe == current)
- last_task_used_spe = NULL;
-#endif
-#endif /* CONFIG_SMP */
+ discard_lazy_cpu_state();
memset(current->thread.fpr, 0, sizeof(current->thread.fpr));
current->thread.fpscr.val = 0;
#ifdef CONFIG_ALTIVEC