x86/fpu: Rename fpu__activate_fpstate() to fpu__activate_fpstate_write()

Remaining users of fpu__activate_fpstate() are all places that want to modify
FPU registers, rename the function to fpu__activate_fpstate_write() according
to this usage.

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Bobby Powers <bobbypowers@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
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/include/asm/fpu/internal.h

@@ -23,7 +23,7 @@
  */
 extern void fpu__activate_curr(struct fpu *fpu);
 extern void fpu__activate_fpstate_read(struct fpu *fpu);
-extern void fpu__activate_fpstate(struct fpu *fpu);
+extern void fpu__activate_fpstate_write(struct fpu *fpu);
 extern void fpu__save(struct fpu *fpu);
 extern void fpu__restore(struct fpu *fpu);
 extern int  fpu__restore_sig(void __user *buf, int ia32_frame);

arch/x86/kernel/fpu/core.c

@@ -345,7 +345,7 @@ void fpu__activate_fpstate_read(struct fpu *fpu)
  *       the read-only case, it's not strictly necessary for
  *       read-only access to the context.
  */
-void fpu__activate_fpstate(struct fpu *fpu)
+void fpu__activate_fpstate_write(struct fpu *fpu)
 {
 	/*
 	 * If fpregs are active (in the current CPU), then

arch/x86/kernel/fpu/regset.c

@@ -50,7 +50,7 @@ int xfpregs_set(struct task_struct *target, const struct user_regset *regset,
 	if (!cpu_has_fxsr)
 		return -ENODEV;
 
-	fpu__activate_fpstate(fpu);
+	fpu__activate_fpstate_write(fpu);
 	fpstate_sanitize_xstate(fpu);
 
 	ret = user_regset_copyin(&pos, &count, &kbuf, &ubuf,
@@ -111,7 +111,7 @@ int xstateregs_set(struct task_struct *target, const struct user_regset *regset,
 	if (!cpu_has_xsave)
 		return -ENODEV;
 
-	fpu__activate_fpstate(fpu);
+	fpu__activate_fpstate_write(fpu);
 
 	xsave = &fpu->state.xsave;
 
@@ -303,7 +303,7 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset,
 	struct user_i387_ia32_struct env;
 	int ret;
 
-	fpu__activate_fpstate(fpu);
+	fpu__activate_fpstate_write(fpu);
 	fpstate_sanitize_xstate(fpu);
 
 	if (!static_cpu_has(X86_FEATURE_FPU))