From: Ian Abbott <abbotti@mev.co.uk>
To: Geliang Tang <geliangtang@163.com>,
Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: hsweeten@visionengravers.com, gregkh@linuxfoundation.org,
devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] staging: comedi: fix cast warning in comedi_compat32.c
Date: Mon, 22 Jun 2015 10:43:38 +0100 [thread overview]
Message-ID: <5587D8CA.6060601@mev.co.uk> (raw)
In-Reply-To: <5d7902ebc1eefb95f29ab3ba8ad9d8029b8024da.1434808718.git.geliangtang@163.com>
On 20/06/15 15:38, 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>
> ---
> Changes in v2:
> - compat_ptr() is substituted by 'unsigned long'.
> ---
> 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..894a50c 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 long)(temp.uptr), &cmd->chanlist);
> err |= __get_user(temp.uint, &cmd32->chanlist_len);
> err |= __put_user(temp.uint, &cmd->chanlist_len);
> err |= __get_user(temp.uptr, &cmd32->data);
>
Now it removes the call to compat_ptr(), so it won't work. Your first
patch was better, apart from exceeding the 80 character line limit.
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-=( Ian Abbott @ MEV Ltd. E-mail: <abbotti@mev.co.uk> )=-
-=( Web: http://www.mev.co.uk/ )=-
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next prev parent reply other threads:[~2015-06-22 9:43 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
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 [this message]
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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