mips: copy_thread(): rename 'arg' argument to 'kthread_arg'

The 'arg' argument to copy_thread() is only ever used when forking a new
kernel thread. Hence, rename it to 'kthread_arg' for clarity (and consistency
with do_fork() and other arch-specific implementations of copy_thread()).

Signed-off-by: Alex Dowad <alexinbeijing@gmail.com>
Cc: linux-kernel@vger.kernel.org
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Alex Smith <alex@alex-smith.me.uk>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Eunbong Song <eunb.song@samsung.com>
Cc: linux-mips@linux-mips.org (open list:MIPS)
Patchwork: https://patchwork.linux-mips.org/patch/9546/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index bf85cc180d9105b7c605d049ccfdb352c76cc066..d295bd1e4996e28224be2a9c286b2f1b87d8b85d 100644 (file)
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -107,8 +107,11 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
        return 0;
 }
 
+/*
+ * Copy architecture-specific thread state
+ */
 int copy_thread(unsigned long clone_flags, unsigned long usp,
-       unsigned long arg, struct task_struct *p)
+       unsigned long kthread_arg, struct task_struct *p)
 {
        struct thread_info *ti = task_thread_info(p);
        struct pt_regs *childregs, *regs = current_pt_regs();
@@ -123,11 +126,12 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
        childksp = (unsigned long) childregs;
        p->thread.cp0_status = read_c0_status() & ~(ST0_CU2|ST0_CU1);
        if (unlikely(p->flags & PF_KTHREAD)) {
+               /* kernel thread */
                unsigned long status = p->thread.cp0_status;
                memset(childregs, 0, sizeof(struct pt_regs));
                ti->addr_limit = KERNEL_DS;
                p->thread.reg16 = usp; /* fn */
-               p->thread.reg17 = arg;
+               p->thread.reg17 = kthread_arg;
                p->thread.reg29 = childksp;
                p->thread.reg31 = (unsigned long) ret_from_kernel_thread;
 #if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
@@ -139,6 +143,8 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
                childregs->cp0_status = status;
                return 0;
        }
+
+       /* user thread */
        *childregs = *regs;
        childregs->regs[7] = 0; /* Clear error flag */
        childregs->regs[2] = 0; /* Child gets zero as return value */