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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-06 14:23:39 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-06 14:23:39 +0200 |
| commit | 68083e05d72d94f347293d8cc0067050ba904bfa (patch) | |
| tree | 842e71365bd90866be7add181661a4039d891564 /arch/x86/kernel/process_64.c | |
| parent | 7baac8b91f9871ba8cb09af84de4ae1d86d07812 (diff) | |
| parent | b7279469d66b55119784b8b9529c99c1955fe747 (diff) | |
| download | linux-stable-68083e05d72d94f347293d8cc0067050ba904bfa.tar.gz linux-stable-68083e05d72d94f347293d8cc0067050ba904bfa.tar.bz2 linux-stable-68083e05d72d94f347293d8cc0067050ba904bfa.zip | |
Merge commit 'v2.6.26-rc9' into cpus4096
Diffstat (limited to 'arch/x86/kernel/process_64.c')
| -rw-r--r-- | arch/x86/kernel/process_64.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index e2319f39988b..c6eb5c91e5f6 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -294,6 +294,7 @@ void flush_thread(void) /* * Forget coprocessor state.. */ + tsk->fpu_counter = 0; clear_fpu(tsk); clear_used_math(); } @@ -658,8 +659,11 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p) /* 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(); return prev_p; } |