x86/fpu: Rename fpstate_alloc_init() to fpstate_init_curr()

Now that there are no FPU context allocations, rename fpstate_alloc_init()
to fpstate_init_curr(), to signal that it initializes the fpstate and
marks it active, for the current task.

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>

arch/x86/math-emu/fpu_entry.c

@@ -150,7 +150,7 @@ void math_emulate(struct math_emu_info *info)
 	struct fpu *fpu = &current->thread.fpu;
 
 	if (!fpu->fpstate_active)
-		fpstate_alloc_init(fpu);
+		fpstate_init_curr(fpu);
 
 #ifdef RE_ENTRANT_CHECKING
 	if (emulating) {