linux-kernel - [PATCH 32/32] xtensa: copy_thread(): rename 'arg' argument to 'kthread

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Date:	Fri, 13 Mar 2015 20:14:55 +0200
From:	Alex Dowad <alexinbeijing@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Chris Zankel <chris@...kel.net>, Max Filippov <jcmvbkbc@...il.com>,
	linux-xtensa@...ux-xtensa.org (open list:TENSILICA XTENSA...)
Subject: [PATCH 32/32] xtensa: copy_thread(): rename 'arg' argument to 'kthread_arg'

Rename the 'thread_fn_arg' it to 'kthread_arg' for consistency
with do_fork() and other arch-specific implementations of copy_thread().

Signed-off-by: Alex Dowad <alexinbeijing@...il.com>
---
 arch/xtensa/kernel/process.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/xtensa/kernel/process.c b/arch/xtensa/kernel/process.c
index 1c85323..b12f5dc 100644
--- a/arch/xtensa/kernel/process.c
+++ b/arch/xtensa/kernel/process.c
@@ -147,7 +147,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
 }
 
 /*
- * Copy thread.
+ * Copy architecture-specific thread state
  *
  * There are two modes in which this function is called:
  * 1) Userspace thread creation,
@@ -156,7 +156,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
  *    in the clone_flags) and set up passed usp in the childregs.
  * 2) Kernel thread creation,
  *    regs == NULL, usp_thread_fn is the function to run in the new thread
- *    and thread_fn_arg is its parameter.
+ *    and kthread_arg is its parameter.
  *    childregs are not used for the kernel threads.
  *
  * The stack layout for the new thread looks like this:
@@ -187,9 +187,8 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src)
  * One solution is to spill windows to the parent stack, but that's fairly
  * involved.  Much simpler to just not copy those live frames across.
  */
-
 int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
-		unsigned long thread_fn_arg, struct task_struct *p)
+		unsigned long kthread_arg, struct task_struct *p)
 {
 	struct pt_regs *childregs = task_pt_regs(p);
 
@@ -204,6 +203,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
 	p->thread.sp = (unsigned long)childregs;
 
 	if (!(p->flags & PF_KTHREAD)) {
+		/* user thread */
 		struct pt_regs *regs = current_pt_regs();
 		unsigned long usp = usp_thread_fn ?
 			usp_thread_fn : regs->areg[1];
@@ -254,13 +254,14 @@ int copy_thread(unsigned long clone_flags, unsigned long usp_thread_fn,
 		if (clone_flags & CLONE_SETTLS)
 			childregs->threadptr = childregs->areg[5];
 	} else {
+		/* kernel thread */
 		p->thread.ra = MAKE_RA_FOR_CALL(
 				(unsigned long)ret_from_kernel_thread, 1);
 
 		/* pass parameters to ret_from_kernel_thread:
 		 * a2 = thread_fn, a3 = thread_fn arg
 		 */
-		*((int *)childregs - 1) = thread_fn_arg;
+		*((int *)childregs - 1) = kthread_arg;
 		*((int *)childregs - 2) = usp_thread_fn;
 
 		/* Childregs are only used when we're going to userspace
-- 
2.0.0.GIT

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