linux-kernel - Re: [PATCH] kernel/fork.c: use sizeof() instead of sizeof

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Date:	Tue, 2 Feb 2016 10:11:18 +0100
From:	Ingo Molnar <mingo@...nel.org>
To:	Wei Tang <tangwei@...s.chinamobile.com>
Cc:	akpm@...ux-foundation.org, peterz@...radead.org, tj@...nel.org,
	kirill.shutemov@...ux.intel.com, jason.low2@...com,
	xypron.glpk@....de, oleg@...hat.com, koct9i@...il.com,
	josh@...htriplett.org, ebiederm@...ssion.com, cyphar@...har.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel/fork.c: use sizeof() instead of sizeof


* Wei Tang <tangwei@...s.chinamobile.com> wrote:

> This patch fixes the checkpatch.pl warning to fork.c:
> 
> WARNING: sizeof sig->rlim should be sizeof(sig->rlim)
> 
> Signed-off-by: Wei Tang <tangwei@...s.chinamobile.com>
> ---
>  kernel/fork.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/kernel/fork.c b/kernel/fork.c
> index 2e391c7..30e04d2 100644
> --- a/kernel/fork.c
> +++ b/kernel/fork.c
> @@ -1143,7 +1143,7 @@ static int copy_signal(unsigned long clone_flags, struct task_struct *tsk)
>  	sig->real_timer.function = it_real_fn;
>  
>  	task_lock(current->group_leader);
> -	memcpy(sig->rlim, current->signal->rlim, sizeof sig->rlim);
> +	memcpy(sig->rlim, current->signal->rlim, sizeof(sig->rlim));
>  	task_unlock(current->group_leader);
>  
>  	posix_cpu_timers_init_group(sig);

So there's over 1,000 such occurances in the kernel and we do not need this 
drip-drip churn...

If anyone feels strongly about accepting such patches, then the right solution is 
to create a Coccinelle semantic patch to run over the whole kernel and get over 
with the churn once and for all.

Thanks,

	Ingo