diff options
Diffstat (limited to 'arch/mn10300/include/asm/system.h')
| -rw-r--r-- | arch/mn10300/include/asm/system.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/mn10300/include/asm/system.h b/arch/mn10300/include/asm/system.h index 9f7c7e17c01e..3c272a1a1015 100644 --- a/arch/mn10300/include/asm/system.h +++ b/arch/mn10300/include/asm/system.h @@ -19,6 +19,21 @@ #include <linux/kernel.h> #include <linux/irqflags.h> +#if !defined(CONFIG_LAZY_SAVE_FPU) +struct fpu_state_struct; +extern asmlinkage void fpu_save(struct fpu_state_struct *); +#define switch_fpu(prev, next) \ + do { \ + if ((prev)->thread.fpu_flags & THREAD_HAS_FPU) { \ + (prev)->thread.fpu_flags &= ~THREAD_HAS_FPU; \ + (prev)->thread.uregs->epsw &= ~EPSW_FE; \ + fpu_save(&(prev)->thread.fpu_state); \ + } \ + } while (0) +#else +#define switch_fpu(prev, next) do {} while (0) +#endif + struct task_struct; struct thread_struct; @@ -30,6 +45,7 @@ struct task_struct *__switch_to(struct thread_struct *prev, /* context switching is now performed out-of-line in switch_to.S */ #define switch_to(prev, next, last) \ do { \ + switch_fpu(prev, next); \ current->thread.wchan = (u_long) __builtin_return_address(0); \ (last) = __switch_to(&(prev)->thread, &(next)->thread, (prev)); \ mb(); \ |