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| author | David Woodhouse <David.Woodhouse@intel.com> | 2008-07-11 14:36:25 +0100 |
|---|---|---|
| committer | David Woodhouse <David.Woodhouse@intel.com> | 2008-07-11 14:36:25 +0100 |
| commit | a8931ef380c92d121ae74ecfb03b2d63f72eea6f (patch) | |
| tree | 980fb6b019e11e6cb1ece55b7faff184721a8053 /arch/x86/kernel/process_32.c | |
| parent | 90574d0a4d4b73308ae54a2a57a4f3f1fa98e984 (diff) | |
| parent | e5a5816f7875207cb0a0a7032e39a4686c5e10a4 (diff) | |
| download | olio-linux-3.10-a8931ef380c92d121ae74ecfb03b2d63f72eea6f.tar.xz olio-linux-3.10-a8931ef380c92d121ae74ecfb03b2d63f72eea6f.zip | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
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(); /* |