diff options
Diffstat (limited to 'arch/x86/kernel/process_32.c')
| -rw-r--r-- | arch/x86/kernel/process_32.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index f8476dfbb60d..6d5483356e74 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c | |||
| @@ -649,8 +649,11 @@ struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct | |||
| 649 | /* If the task has used fpu the last 5 timeslices, just do a full | 649 | /* If the task has used fpu the last 5 timeslices, just do a full |
| 650 | * restore of the math state immediately to avoid the trap; the | 650 | * restore of the math state immediately to avoid the trap; the |
| 651 | * chances of needing FPU soon are obviously high now | 651 | * chances of needing FPU soon are obviously high now |
| 652 | * | ||
| 653 | * tsk_used_math() checks prevent calling math_state_restore(), | ||
| 654 | * which can sleep in the case of !tsk_used_math() | ||
| 652 | */ | 655 | */ |
| 653 | if (next_p->fpu_counter > 5) | 656 | if (tsk_used_math(next_p) && next_p->fpu_counter > 5) |
| 654 | math_state_restore(); | 657 | math_state_restore(); |
| 655 | 658 | ||
| 656 | /* | 659 | /* |