x86/fpu: Rename fpu__clear_all() to fpu_flush_thread()

Make it clear what the function is about.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121455.827979263@linutronix.de

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

@@ -29,12 +29,13 @@
 extern int  fpu__restore_sig(void __user *buf, int ia32_frame);
 extern void fpu__drop(struct fpu *fpu);
 extern void fpu__clear_user_states(struct fpu *fpu);
-extern void fpu__clear_all(struct fpu *fpu);
 extern int  fpu__exception_code(struct fpu *fpu, int trap_nr);
 
 extern void fpu_sync_fpstate(struct fpu *fpu);
 
+/* Clone and exit operations */
 extern int  fpu_clone(struct task_struct *dst);
+extern void fpu_flush_thread(void);
 
 /*
  * Boot time FPU initialization functions:

arch/x86/kernel/fpu/core.c

@@ -350,9 +350,9 @@ void fpu__clear_user_states(struct fpu *fpu)
 	fpu__clear(fpu, true);
 }
 
-void fpu__clear_all(struct fpu *fpu)
+void fpu_flush_thread(void)
 {
-	fpu__clear(fpu, false);
+	fpu__clear(&current->thread.fpu, false);
 }
 
 /*

arch/x86/kernel/process.c

@@ -205,7 +205,7 @@ void flush_thread(void)
 	flush_ptrace_hw_breakpoint(tsk);
 	memset(tsk->thread.tls_array, 0, sizeof(tsk->thread.tls_array));
 
-	fpu__clear_all(&tsk->thread.fpu);
+	fpu_flush_thread();
 }
 
 void disable_TSC(void)