x86/fpu: Use 'struct fpu' in fpu_reset_state()

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>
diff --git a/arch/x86/include/asm/fpu-internal.h b/arch/x86/include/asm/fpu-internal.h
index 2d7934e4..579f7d0 100644
--- a/arch/x86/include/asm/fpu-internal.h
+++ b/arch/x86/include/asm/fpu-internal.h
@@ -380,10 +380,8 @@
  * Reset the FPU state in the eager case and drop it in the lazy case (later use
  * will reinit it).
  */
-static inline void fpu_reset_state(struct task_struct *tsk)
+static inline void fpu_reset_state(struct fpu *fpu)
 {
-	struct fpu *fpu = &tsk->thread.fpu;
-
 	if (!use_eager_fpu())
 		drop_fpu(fpu);
 	else
@@ -460,7 +458,7 @@
 
 	if (fpu.preload) {
 		if (unlikely(restore_fpu_checking(new_fpu)))
-			fpu_reset_state(new);
+			fpu_reset_state(new_fpu);
 	}
 }