From: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
To: Geliang Tang <geliangtang@163.com>
Cc: abbotti@mev.co.uk, hsweeten@visionengravers.com,
gregkh@linuxfoundation.org, devel@driverdev.osuosl.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] staging: comedi: fix sparse warning in comedi_compat32.c
Date: Sat, 20 Jun 2015 16:08:19 +0530 [thread overview]
Message-ID: <20150620103819.GA29626@sudip-PC> (raw)
In-Reply-To: <1434818953-19058-1-git-send-email-geliangtang@163.com>
On Sat, Jun 20, 2015 at 04:49:13PM +0000, Geliang Tang wrote:
> This patch fixes the following sparse warning:
>
> drivers/staging/comedi/comedi_compat32.c:205:16: warning: cast removes
> address space of expression
>
> Signed-off-by: Geliang Tang <geliangtang@163.com>
> ---
> drivers/staging/comedi/comedi_compat32.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/comedi/comedi_compat32.c b/drivers/staging/comedi/comedi_compat32.c
> index 2584824..29a10fe4 100644
> --- a/drivers/staging/comedi/comedi_compat32.c
> +++ b/drivers/staging/comedi/comedi_compat32.c
> @@ -202,7 +202,7 @@ static int get_compat_cmd(struct comedi_cmd __user *cmd,
> err |= __get_user(temp.uint, &cmd32->stop_arg);
> err |= __put_user(temp.uint, &cmd->stop_arg);
> err |= __get_user(temp.uptr, &cmd32->chanlist);
> - err |= __put_user(compat_ptr(temp.uptr), &cmd->chanlist);
> + err |= __put_user((unsigned int __force *)compat_ptr(temp.uptr), &cmd->chanlist);
compat_ptr is already a typecast.
static inline void __user *compat_ptr(compat_uptr_t uptr)
{
return (void __user *)(unsigned long)uptr;
}
so you are adding another typecast to an already exitsing typecast. :(
and besides, this also introduces one new checkpatch warning of
line more than 80 char.
regards
sudip
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next prev parent reply other threads:[~2015-06-20 10:38 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-20 16:49 [PATCH] staging: comedi: fix sparse warning in comedi_compat32.c Geliang Tang
2015-06-20 10:38 ` Sudip Mukherjee [this message]
2015-06-20 14:38 ` Geliang Tang
2015-06-20 14:38 ` [PATCH v2] staging: comedi: fix cast " Geliang Tang
2015-06-22 9:43 ` Ian Abbott
2015-06-22 15:33 ` Geliang Tang
2015-06-22 15:33 ` [PATCH v3] " Geliang Tang
2015-06-22 16:08 ` Ian Abbott
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