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: NBorislav 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: NIngo Molnar <mingo@kernel.org>

arch/x86/include/asm/fpu/internal.h

@@ -44,7 +44,7 @@ extern void fpu__init_system_xstate(void);
 extern void fpu__init_cpu_xstate(void);
 extern void fpu__init_system(struct cpuinfo_x86 *c);
 
-extern void fpstate_alloc_init(struct fpu *fpu);
+extern void fpstate_init_curr(struct fpu *fpu);
 extern void fpstate_init(struct fpu *fpu);
 extern void fpu__clear(struct task_struct *tsk);
 

arch/x86/kernel/fpu/core.c

@@ -261,7 +261,7 @@ int fpu__copy(struct fpu *dst_fpu, struct fpu *src_fpu)
 /*
  * Initialize the current task's in-memory FPU context:
  */
-void fpstate_alloc_init(struct fpu *fpu)
+void fpstate_init_curr(struct fpu *fpu)
 {
 	WARN_ON_ONCE(fpu != &current->thread.fpu);
 	WARN_ON_ONCE(fpu->fpstate_active);
@@ -271,7 +271,7 @@ void fpstate_alloc_init(struct fpu *fpu)
 	/* Safe to do for the current task: */
 	fpu->fpstate_active = 1;
 }
-EXPORT_SYMBOL_GPL(fpstate_alloc_init);
+EXPORT_SYMBOL_GPL(fpstate_init_curr);
 
 /*
  * This function is called before we modify a stopped child's
@@ -332,7 +332,7 @@ void fpu__restore(void)
 	struct fpu *fpu = &tsk->thread.fpu;
 
 	if (!fpu->fpstate_active)
-		fpstate_alloc_init(fpu);
+		fpstate_init_curr(fpu);
 
 	/* Avoid __kernel_fpu_begin() right after fpregs_activate() */
 	kernel_fpu_disable();
@@ -358,7 +358,7 @@ void fpu__clear(struct task_struct *tsk)
 		drop_fpu(fpu);
 	} else {
 		if (!fpu->fpstate_active) {
-			fpstate_alloc_init(fpu);
+			fpstate_init_curr(fpu);
 			user_fpu_begin();
 		}
 		restore_init_xstate();

arch/x86/kernel/fpu/xsave.c

@@ -359,7 +359,7 @@ int __restore_xstate_sig(void __user *buf, void __user *buf_fx, int size)
 		return -EACCES;
 
 	if (!fpu->fpstate_active)
-		fpstate_alloc_init(fpu);
+		fpstate_init_curr(fpu);
 
 	if (!static_cpu_has(X86_FEATURE_FPU))
 		return fpregs_soft_set(current, NULL,

arch/x86/kvm/x86.c

@@ -6602,7 +6602,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
 	sigset_t sigsaved;
 
 	if (!fpu->fpstate_active)
-		fpstate_alloc_init(fpu);
+		fpstate_init_curr(fpu);
 
 	if (vcpu->sigset_active)
 		sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);

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) {