linux-kernel - [PATCH v3] staging: comedi: fix cast warning in comedi

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Date:	Mon, 22 Jun 2015 23:33:42 +0800
From:	Geliang Tang <geliangtang@....com>
To:	Ian Abbott <abbotti@....co.uk>
Cc:	Geliang Tang <geliangtang@....com>, sudipm.mukherjee@...il.com,
	hsweeten@...ionengravers.com, gregkh@...uxfoundation.org,
	devel@...verdev.osuosl.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3] staging: comedi: fix cast warning in comedi_compat32.c

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@....com>
---
Changes in v3:
  - fix the 80 character line limit.

Changes in v2:
  - compat_ptr() is substituted by 'unsigned long'.
---
 drivers/staging/comedi/comedi_compat32.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/staging/comedi/comedi_compat32.c b/drivers/staging/comedi/comedi_compat32.c
index 2584824..f356386 100644
--- a/drivers/staging/comedi/comedi_compat32.c
+++ b/drivers/staging/comedi/comedi_compat32.c
@@ -202,7 +202,8 @@ 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);
 	err |= __get_user(temp.uint, &cmd32->chanlist_len);
 	err |= __put_user(temp.uint, &cmd->chanlist_len);
 	err |= __get_user(temp.uptr, &cmd32->data);
-- 
2.3.4


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