forked from Minki/linux
x86/fpu: Remove 'struct task_struct' usage from __thread_set_has_fpu()
Migrate this function to pure 'struct fpu' usage. 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: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
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@ -331,10 +331,10 @@ static inline void __thread_clear_has_fpu(struct fpu *fpu)
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}
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/* Must be paired with a 'clts' before! */
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static inline void __thread_set_has_fpu(struct task_struct *tsk)
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static inline void __thread_set_has_fpu(struct fpu *fpu)
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{
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tsk->thread.fpu.has_fpu = 1;
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this_cpu_write(fpu_fpregs_owner_ctx, &tsk->thread.fpu);
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fpu->has_fpu = 1;
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this_cpu_write(fpu_fpregs_owner_ctx, fpu);
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}
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/*
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@ -355,7 +355,7 @@ static inline void __thread_fpu_begin(struct task_struct *tsk)
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{
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if (!use_eager_fpu())
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clts();
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__thread_set_has_fpu(tsk);
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__thread_set_has_fpu(&tsk->thread.fpu);
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}
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static inline void drop_fpu(struct task_struct *tsk)
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@ -416,6 +416,7 @@ typedef struct { int preload; } fpu_switch_t;
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static inline fpu_switch_t switch_fpu_prepare(struct task_struct *old, struct task_struct *new, int cpu)
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{
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struct fpu *old_fpu = &old->thread.fpu;
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struct fpu *new_fpu = &new->thread.fpu;
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fpu_switch_t fpu;
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/*
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@ -437,7 +438,7 @@ static inline fpu_switch_t switch_fpu_prepare(struct task_struct *old, struct ta
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/* Don't change CR0.TS if we just switch! */
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if (fpu.preload) {
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new->thread.fpu.counter++;
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__thread_set_has_fpu(new);
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__thread_set_has_fpu(new_fpu);
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prefetch(new->thread.fpu.state);
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} else if (!use_eager_fpu())
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stts();
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