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From: Hans-Christian Egtvedt <egtvedt@samfundet.no>
To: Alex Dowad <alexinbeijing@gmail.com>
Cc: linux-kernel@vget.kernel.org,
	Haavard Skinnemoen <hskinnemoen@gmail.com>,
	open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 06/32] avr32: copy_thread(): rename 'arg' argument to 'kthread_arg'
Date: Mon, 16 Mar 2015 08:03:50 +0100	[thread overview]
Message-ID: <20150316070350.GA19986@samfundet.no> (raw)
In-Reply-To: <1426269888-25600-6-git-send-email-alexinbeijing@gmail.com>

Around Fri 13 Mar 2015 20:04:21 +0200 or thereabout, Alex Dowad wrote:
> 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>

In general
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>

> ---
>  arch/avr32/kernel/process.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/avr32/kernel/process.c b/arch/avr32/kernel/process.c
> index 42a53e74..a255bd3 100644
> --- a/arch/avr32/kernel/process.c
> +++ b/arch/avr32/kernel/process.c
> @@ -279,20 +279,25 @@ asmlinkage void ret_from_fork(void);
>  asmlinkage void ret_from_kernel_thread(void);
>  asmlinkage void syscall_return(void);
>  
> +/*
> + * Copy architecture-specific thread state
> + */
>  int copy_thread(unsigned long clone_flags, unsigned long usp,
> -		unsigned long arg,
> +		unsigned long kthread_arg,
>  		struct task_struct *p)
>  {
>  	struct pt_regs *childregs = task_pt_regs(p);
>  
>  	if (unlikely(p->flags & PF_KTHREAD)) {
> +		/* kernel thread */

This is not needed, it is clearly stated on the line above.

>  		memset(childregs, 0, sizeof(struct pt_regs));
> -		p->thread.cpu_context.r0 = arg;
> +		p->thread.cpu_context.r0 = kthread_arg;
>  		p->thread.cpu_context.r1 = usp; /* fn */
>  		p->thread.cpu_context.r2 = (unsigned long)syscall_return;
>  		p->thread.cpu_context.pc = (unsigned long)ret_from_kernel_thread;
>  		childregs->sr = MODE_SUPERVISOR;
>  	} else {
> +		/* user thread */

Likewise, do not add obvious comments.

>  		*childregs = *current_pt_regs();
>  		if (usp)
>  			childregs->sp = usp;
-- 
Hans-Christian Egtvedt

  reply	other threads:[~2015-03-16  7:03 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-03-13 18:04 [PATCH 01/32] do_fork(): Rename 'stack_size' argument to reflect actual use Alex Dowad
2015-03-13 18:04 ` [PATCH 02/32] alpha: copy_thread(): rename 'arg' argument to 'kthread_arg' Alex Dowad
2015-03-13 18:04 ` [PATCH 03/32] arc: " Alex Dowad
2015-03-25 11:47   ` Vineet Gupta
2015-03-25 12:34     ` Alex Dowad
2015-03-25 12:37       ` Vineet Gupta
2015-03-13 18:04 ` [PATCH 04/32] arm: copy_thread(): rename 'stk_sz' " Alex Dowad
2015-03-13 18:04 ` [PATCH 05/32] arm64: " Alex Dowad
2015-03-13 18:04 ` [PATCH 06/32] avr32: copy_thread(): rename 'arg' " Alex Dowad
2015-03-16  7:03   ` Hans-Christian Egtvedt [this message]
2015-03-16  8:18     ` [PATCHv2 " Alex Dowad
2015-03-16  9:52       ` Hans-Christian Egtvedt
2015-03-13 18:04 ` [PATCH 07/32] blackfin: copy_thread(): rename 'topstk' " Alex Dowad
2015-03-13 18:04 ` [PATCH 08/32] c6x: copy_thread(): rename 'ustk_size' " Alex Dowad
2015-03-13 18:04 ` [PATCH 09/32] cris/arch-v10: copy_thread(): rename 'arg' " Alex Dowad
2015-03-25 11:20   ` Jesper Nilsson
2015-03-13 18:04 ` [PATCH 10/32] cris/arch-v32: " Alex Dowad
2015-03-25 11:20   ` Jesper Nilsson
2015-03-13 18:18 ` [PATCH 01/32] do_fork(): Rename 'stack_size' argument to reflect actual use Aaron Tomlin
2015-03-13 23:04 ` josh
2015-03-13 23:21   ` David Rientjes
2015-03-14 17:14     ` Alex Dowad
2015-03-14 16:19   ` Alex Dowad
2015-03-14 17:30     ` Geert Uytterhoeven

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