[PATCH 09/29] staging/lustre: Mark obd_ioctl_popdata/getdata argument as __user

[green at linuxhacker.ru]

From: Oleg Drokin <green at linuxhacker.ru>

arg is a userspace pointer and marking it as such makes sparse happy.

Signed-off-by: Oleg Drokin <green at linuxhacker.ru>
---
 drivers/staging/lustre/lustre/include/lustre_lib.h         |  4 ++--
 drivers/staging/lustre/lustre/llite/dir.c                  |  4 ++--
 drivers/staging/lustre/lustre/obdclass/class_obd.c         | 14 ++++++++------
 .../staging/lustre/lustre/obdclass/linux/linux-module.c    |  8 ++++----
 4 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre_lib.h b/drivers/staging/lustre/lustre/include/lustre_lib.h
index 3d75a82..cfccf7c 100644
--- a/drivers/staging/lustre/lustre/include/lustre_lib.h
+++ b/drivers/staging/lustre/lustre/include/lustre_lib.h
@@ -252,8 +252,8 @@ static inline int obd_ioctl_is_invalid(struct obd_ioctl_data *data)
 #include "obd_support.h"
 
 /* function defined in lustre/obdclass/<platform>/<platform>-module.c */
-int obd_ioctl_getdata(char **buf, int *len, void *arg);
-int obd_ioctl_popdata(void *arg, void *data, int len);
+int obd_ioctl_getdata(char **buf, int *len, void __user *arg);
+int obd_ioctl_popdata(void __user *arg, void *data, int len);
 
 static inline void obd_ioctl_freedata(char *buf, int len)
 {
diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 7b35531..5b7780a 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -1278,7 +1278,7 @@ static long ll_dir_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		char *filename;
 		struct md_op_data *op_data;
 
-		rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
+		rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
 		if (rc)
 			return rc;
 		data = (void *)buf;
@@ -1320,7 +1320,7 @@ out_free:
 		int		 len;
 		int		 rc;
 
-		rc = obd_ioctl_getdata(&buf, &len, (void *)arg);
+		rc = obd_ioctl_getdata(&buf, &len, (void __user *)arg);
 		if (rc)
 			return rc;
 
diff --git a/drivers/staging/lustre/lustre/obdclass/class_obd.c b/drivers/staging/lustre/lustre/obdclass/class_obd.c
index 0975e44..65cf46c 100644
--- a/drivers/staging/lustre/lustre/obdclass/class_obd.c
+++ b/drivers/staging/lustre/lustre/obdclass/class_obd.c
@@ -180,7 +180,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 	}
 
 	CDEBUG(D_IOCTL, "cmd = %x\n", cmd);
-	if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
+	if (obd_ioctl_getdata(&buf, &len, (void __user *)arg)) {
 		CERROR("OBD ioctl: data error\n");
 		return -EINVAL;
 	}
@@ -227,7 +227,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 		memcpy(data->ioc_bulk, BUILD_VERSION,
 		       strlen(BUILD_VERSION) + 1);
 
-		err = obd_ioctl_popdata((void *)arg, data, len);
+		err = obd_ioctl_popdata((void __user *)arg, data, len);
 		if (err)
 			err = -EFAULT;
 		goto out;
@@ -246,7 +246,8 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 			goto out;
 		}
 
-		err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
+		err = obd_ioctl_popdata((void __user *)arg, data,
+					sizeof(*data));
 		if (err)
 			err = -EFAULT;
 		goto out;
@@ -283,7 +284,8 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 
 		CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
 		       dev);
-		err = obd_ioctl_popdata((void *)arg, data, sizeof(*data));
+		err = obd_ioctl_popdata((void __user *)arg, data,
+					sizeof(*data));
 		if (err)
 			err = -EFAULT;
 		goto out;
@@ -330,7 +332,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 			 (int)index, status, obd->obd_type->typ_name,
 			 obd->obd_name, obd->obd_uuid.uuid,
 			 atomic_read(&obd->obd_refcount));
-		err = obd_ioctl_popdata((void *)arg, data, len);
+		err = obd_ioctl_popdata((void __user *)arg, data, len);
 
 		err = 0;
 		goto out;
@@ -388,7 +390,7 @@ int class_handle_ioctl(unsigned int cmd, unsigned long arg)
 		if (err)
 			goto out;
 
-		err = obd_ioctl_popdata((void *)arg, data, len);
+		err = obd_ioctl_popdata((void __user *)arg, data, len);
 		if (err)
 			err = -EFAULT;
 		goto out;
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index a055cbb..f8d3a63 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -74,14 +74,14 @@
 #include "../../include/lustre/lustre_build_version.h"
 
 /* buffer MUST be at least the size of obd_ioctl_hdr */
-int obd_ioctl_getdata(char **buf, int *len, void *arg)
+int obd_ioctl_getdata(char **buf, int *len, void __user *arg)
 {
 	struct obd_ioctl_hdr hdr;
 	struct obd_ioctl_data *data;
 	int err;
 	int offset = 0;
 
-	if (copy_from_user(&hdr, (void *)arg, sizeof(hdr)))
+	if (copy_from_user(&hdr, arg, sizeof(hdr)))
 		return -EFAULT;
 
 	if (hdr.ioc_version != OBD_IOCTL_VERSION) {
@@ -114,7 +114,7 @@ int obd_ioctl_getdata(char **buf, int *len, void *arg)
 	*len = hdr.ioc_len;
 	data = (struct obd_ioctl_data *)*buf;
 
-	if (copy_from_user(*buf, (void *)arg, hdr.ioc_len)) {
+	if (copy_from_user(*buf, arg, hdr.ioc_len)) {
 		err = -EFAULT;
 		goto free_buf;
 	}
@@ -156,7 +156,7 @@ free_buf:
 }
 EXPORT_SYMBOL(obd_ioctl_getdata);
 
-int obd_ioctl_popdata(void *arg, void *data, int len)
+int obd_ioctl_popdata(void __user *arg, void *data, int len)
 {
 	int err;
 
-- 
2.1.0