| From | Ingo Molnar <> | Subject | [PATCH 010/208] x86/fpu: Simplify fpu__unlazy_stopped() | Date | Tue, 5 May 2015 18:23:50 +0200 |
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Open code the PF_USED_MATH logic, to make the logic more obvious.
(We'll slowly convert the other users of *_used_math() methods as well.)
Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> --- arch/x86/kernel/i387.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index 76006a701dbb..5e4dae70ffa5 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -290,7 +290,7 @@ static int fpu__unlazy_stopped(struct task_struct *child) if (WARN_ON_ONCE(child == current)) return -EINVAL; - if (tsk_used_math(child)) { + if (child->flags & PF_USED_MATH) { task_disable_lazy_fpu_restore(child); return 0; } @@ -304,7 +304,9 @@ static int fpu__unlazy_stopped(struct task_struct *child) fpu_finit(&child->thread.fpu); - set_stopped_child_used_math(child); + /* Safe to do for stopped child tasks: */ + child->flags |= PF_USED_MATH; + return 0; } -- 2.1.0
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