x86/fpu: Remove pointless argument from switch_fpu_finish()

mainline inclusion
from mainline-v5.16-rc1
commit 9568bfb4
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I590ZC
CVE: NA

Intel-SIG: commit 9568bfb4 x86/fpu: Remove pointless argument from switch_fpu_finish().

--------------------------------

Unused since the FPU switching rework.
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NBorislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20211015011538.433135710@linutronix.deSigned-off-by: NLin Wang <lin.x.wang@intel.com>

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

@@ -521,7 +521,7 @@ static inline void switch_fpu_prepare(struct fpu *old_fpu, int cpu)
  * Delay loading of the complete FPU state until the return to userland.
  * PKRU is handled separately.
  */
-static inline void switch_fpu_finish(struct fpu *new_fpu)
+static inline void switch_fpu_finish(void)
 {
 	if (cpu_feature_enabled(X86_FEATURE_FPU))
 		set_thread_flag(TIF_NEED_FPU_LOAD);

arch/x86/kernel/process_32.c

@@ -160,7 +160,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 	struct thread_struct *prev = &prev_p->thread,
 			     *next = &next_p->thread;
 	struct fpu *prev_fpu = &prev->fpu;
-	struct fpu *next_fpu = &next->fpu;
 	int cpu = smp_processor_id();
 
 	/* never put a printk in __switch_to... printk() calls wake_up*() indirectly */
@@ -213,7 +212,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 
 	this_cpu_write(current_task, next_p);
 
-	switch_fpu_finish(next_fpu);
+	switch_fpu_finish();
 
 	/* Load the Intel cache allocation PQR MSR. */
 	resctrl_sched_in();

arch/x86/kernel/process_64.c

@@ -560,7 +560,6 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 	struct thread_struct *prev = &prev_p->thread;
 	struct thread_struct *next = &next_p->thread;
 	struct fpu *prev_fpu = &prev->fpu;
-	struct fpu *next_fpu = &next->fpu;
 	int cpu = smp_processor_id();
 
 	WARN_ON_ONCE(IS_ENABLED(CONFIG_DEBUG_ENTRY) &&
@@ -621,7 +620,7 @@ __switch_to(struct task_struct *prev_p, struct task_struct *next_p)
 	this_cpu_write(current_task, next_p);
 	this_cpu_write(cpu_current_top_of_stack, task_top_of_stack(next_p));
 
-	switch_fpu_finish(next_fpu);
+	switch_fpu_finish();
 
 	/* Reload sp0. */
 	update_task_stack(next_p);