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 a30aa1f2607a..61f7481c31dd 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c | |||
| @@ -652,8 +652,11 @@ struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct | |||
| 652 | /* If the task has used fpu the last 5 timeslices, just do a full | 652 | /* If the task has used fpu the last 5 timeslices, just do a full |
| 653 | * restore of the math state immediately to avoid the trap; the | 653 | * restore of the math state immediately to avoid the trap; the |
| 654 | * chances of needing FPU soon are obviously high now | 654 | * chances of needing FPU soon are obviously high now |
| 655 | * | ||
| 656 | * tsk_used_math() checks prevent calling math_state_restore(), | ||
| 657 | * which can sleep in the case of !tsk_used_math() | ||
| 655 | */ | 658 | */ |
| 656 | if (next_p->fpu_counter > 5) | 659 | if (tsk_used_math(next_p) && next_p->fpu_counter > 5) |
| 657 | math_state_restore(); | 660 | math_state_restore(); |
| 658 | 661 | ||
| 659 | /* | 662 | /* |