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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-03 15:03:02 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-03 15:03:02 +0200 |
| commit | a8cac817764a494705aebd99fd51bdf6cdc28ec9 (patch) | |
| tree | 202847337f42b188755a53a7b57b502a7cdc0ad3 /arch/x86/kernel/process_32.c | |
| parent | b4b3bd96f26586e53ab5482f1869221dd1b5ac36 (diff) | |
| parent | 543cf4cb3fe6f6cae3651ba918b9c56200b257d0 (diff) | |
Merge commit 'v2.6.26-rc8' into x86/mce
Diffstat (limited to 'arch/x86/kernel/process_32.c')
| -rw-r--r-- | arch/x86/kernel/process_32.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index f8476dfbb60..e2db9ac5c61 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -333,6 +333,7 @@ void flush_thread(void) /* * Forget coprocessor state.. */ + tsk->fpu_counter = 0; clear_fpu(tsk); clear_used_math(); } @@ -649,8 +650,11 @@ struct task_struct * __switch_to(struct task_struct *prev_p, struct task_struct /* If the task has used fpu the last 5 timeslices, just do a full * restore of the math state immediately to avoid the trap; the * chances of needing FPU soon are obviously high now + * + * tsk_used_math() checks prevent calling math_state_restore(), + * which can sleep in the case of !tsk_used_math() */ - if (next_p->fpu_counter > 5) + if (tsk_used_math(next_p) && next_p->fpu_counter > 5) math_state_restore(); /* |