diff options
| -rw-r--r-- | arch/x86/kernel/i387.c | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index a815723..12088a3 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -81,9 +81,7 @@ void __kernel_fpu_begin(void) this_cpu_write(in_kernel_fpu, true); if (__thread_has_fpu(me)) { - __thread_clear_has_fpu(me); __save_init_fpu(me); - /* We do 'stts()' in __kernel_fpu_end() */ } else if (!use_eager_fpu()) { this_cpu_write(fpu_owner_task, NULL); clts(); @@ -93,17 +91,12 @@ EXPORT_SYMBOL(__kernel_fpu_begin); void __kernel_fpu_end(void) { - if (use_eager_fpu()) { - /* - * For eager fpu, most the time, tsk_used_math() is true. - * Restore the user math as we are done with the kernel usage. - * At few instances during thread exit, signal handling etc, - * tsk_used_math() is false. Those few places will take proper - * actions, so we don't need to restore the math here. - */ - if (likely(tsk_used_math(current))) - math_state_restore(); - } else { + struct task_struct *me = current; + + if (__thread_has_fpu(me)) { + if (WARN_ON(restore_fpu_checking(me))) + drop_init_fpu(me); + } else if (!use_eager_fpu()) { stts(); } |