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author | Jonathan Corbet | 2008-07-14 23:29:34 +0200 |
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committer | Jonathan Corbet | 2008-07-14 23:29:34 +0200 |
commit | 2fceef397f9880b212a74c418290ce69e7ac00eb (patch) | |
tree | d9cc09ab992825ef7fede4a688103503e3caf655 /arch/x86/kernel/process_64.c | |
parent | IB/umad: BKL is not needed for ib_umad_open() (diff) | |
parent | Linux 2.6.26 (diff) | |
download | kernel-qcow2-linux-2fceef397f9880b212a74c418290ce69e7ac00eb.tar.gz kernel-qcow2-linux-2fceef397f9880b212a74c418290ce69e7ac00eb.tar.xz kernel-qcow2-linux-2fceef397f9880b212a74c418290ce69e7ac00eb.zip |
Merge commit 'v2.6.26' into bkl-removal
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; } |