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SubjectRe: [PATCH] staging: lustre: Fix sparse warning on address-space
Hi all
Ping again, any comments are welcome

Justin

On Mon, 29 Dec 2014 20:49:40 +0800 from hejianet@gmail.com wrote:
> This patch is to fix the below warnings generated by sparse:
> warning: incorrect type in argument 1 (different address spaces)
> expected void const volatile [noderef] <asn:1>*<noident>
> got int *<noident>
> Adding the macro "__user" can suppress the warnings, and aslo some lines
> are adjusted for 80 chars line limitation.
> Already checked by sparse "C=2"
>
> Signed-off-by: Jia He <hejianet@gmail.com>
> Cc: Oleg Drokin <oleg.drokin@intel.com>
> Cc: Andreas Dilger <andreas.dilger@intel.com>
> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> ---
> .../staging/lustre/lustre/include/lprocfs_status.h | 18 ++++-----
> .../lustre/lustre/obdclass/lprocfs_status.c | 6 +--
> drivers/staging/lustre/lustre/osc/lproc_osc.c | 44 +++++++++++-----------
> drivers/staging/lustre/lustre/osc/osc_request.c | 6 +--
> .../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c | 6 +--
> 5 files changed, 40 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
> index cfe503b..ed4932f 100644
> --- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
> +++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
> @@ -631,13 +631,13 @@ extern int lprocfs_wr_timeouts(struct file *file, const char *buffer,
> unsigned long count, void *data);
> extern int lprocfs_wr_evict_client(struct file *file, const char *buffer,
> size_t count, loff_t *off);
> -extern int lprocfs_wr_ping(struct file *file, const char *buffer,
> +extern int lprocfs_wr_ping(struct file *file, const char __user *buffer,
> size_t count, loff_t *off);
> -extern int lprocfs_wr_import(struct file *file, const char *buffer,
> +extern int lprocfs_wr_import(struct file *file, const char __user *buffer,
> size_t count, loff_t *off);
> extern int lprocfs_rd_pinger_recov(struct seq_file *m, void *n);
> -extern int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
> - size_t count, loff_t *off);
> +extern int lprocfs_wr_pinger_recov(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off);
>
> /* Statfs helpers */
> extern int lprocfs_rd_blksize(struct seq_file *m, void *data);
> @@ -650,9 +650,9 @@ extern int lprocfs_rd_filesfree(struct seq_file *m, void *data);
> extern int lprocfs_write_helper(const char __user *buffer, unsigned long count,
> int *val);
> extern int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult);
> -extern int lprocfs_write_u64_helper(const char *buffer, unsigned long count,
> - __u64 *val);
> -extern int lprocfs_write_frac_u64_helper(const char *buffer,
> +extern int lprocfs_write_u64_helper(const char __user *buffer,
> + unsigned long count, __u64 *val);
> +extern int lprocfs_write_frac_u64_helper(const char __user *buffer,
> unsigned long count,
> __u64 *val, int mult);
> extern char *lprocfs_find_named_value(const char *buffer, const char *name,
> @@ -716,7 +716,7 @@ static struct file_operations name##_fops = { \
> return lprocfs_rd_##type(m, m->private); \
> } \
> static ssize_t name##_##type##_seq_write(struct file *file, \
> - const char *buffer, size_t count, loff_t *off) \
> + const char __user *buffer, size_t count, loff_t *off) \
> { \
> struct seq_file *seq = file->private_data; \
> return lprocfs_wr_##type(file, buffer, \
> @@ -726,7 +726,7 @@ static struct file_operations name##_fops = { \
>
> #define LPROC_SEQ_FOPS_WR_ONLY(name, type) \
> static ssize_t name##_##type##_write(struct file *file, \
> - const char *buffer, size_t count, loff_t *off) \
> + const char __user *buffer, size_t count, loff_t *off) \
> { \
> return lprocfs_wr_##type(file, buffer, count, off); \
> } \
> diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
> index 3b7dfc3..9a84b52 100644
> --- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
> +++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
> @@ -1849,15 +1849,15 @@ int lprocfs_seq_read_frac_helper(struct seq_file *m, long val, int mult)
> }
> EXPORT_SYMBOL(lprocfs_seq_read_frac_helper);
>
> -int lprocfs_write_u64_helper(const char *buffer, unsigned long count,
> +int lprocfs_write_u64_helper(const char __user *buffer, unsigned long count,
> __u64 *val)
> {
> return lprocfs_write_frac_u64_helper(buffer, count, val, 1);
> }
> EXPORT_SYMBOL(lprocfs_write_u64_helper);
>
> -int lprocfs_write_frac_u64_helper(const char *buffer, unsigned long count,
> - __u64 *val, int mult)
> +int lprocfs_write_frac_u64_helper(const char __user *buffer,
> + unsigned long count, __u64 *val, int mult)
> {
> char kernbuf[22], *end, *pbuf;
> __u64 whole, frac = 0, units;
> diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
> index 9f719bc..507592c 100644
> --- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
> +++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c
> @@ -53,8 +53,8 @@ static int osc_active_seq_show(struct seq_file *m, void *v)
> return rc;
> }
>
> -static ssize_t osc_active_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_active_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
> int val, rc;
> @@ -88,7 +88,7 @@ static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
> }
>
> static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file,
> - const char *buffer, size_t count, loff_t *off)
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
> struct client_obd *cli = &dev->u.cli;
> @@ -130,8 +130,8 @@ static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v)
> return lprocfs_seq_read_frac_helper(m, val, mult);
> }
>
> -static ssize_t osc_max_dirty_mb_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_max_dirty_mb_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
> struct client_obd *cli = &dev->u.cli;
> @@ -233,8 +233,8 @@ static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v)
> return rc;
> }
>
> -static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_cur_grant_bytes_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> struct client_obd *cli = &obd->u.cli;
> @@ -290,7 +290,7 @@ static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v)
> }
>
> static ssize_t osc_grant_shrink_interval_seq_write(struct file *file,
> - const char *buffer, size_t count, loff_t *off)
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> int val, rc;
> @@ -322,8 +322,8 @@ static int osc_checksum_seq_show(struct seq_file *m, void *v)
> obd->u.cli.cl_checksum ? 1 : 0);
> }
>
> -static ssize_t osc_checksum_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_checksum_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> int val, rc;
> @@ -362,8 +362,8 @@ static int osc_checksum_type_seq_show(struct seq_file *m, void *v)
> return 0;
> }
>
> -static ssize_t osc_checksum_type_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_checksum_type_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> int i;
> @@ -401,8 +401,8 @@ static int osc_resend_count_seq_show(struct seq_file *m, void *v)
> return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends));
> }
>
> -static ssize_t osc_resend_count_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_resend_count_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> int val, rc;
> @@ -428,8 +428,8 @@ static int osc_contention_seconds_seq_show(struct seq_file *m, void *v)
> return seq_printf(m, "%u\n", od->od_contention_time);
> }
>
> -static ssize_t osc_contention_seconds_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_contention_seconds_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> struct osc_device *od = obd2osc_dev(obd);
> @@ -447,8 +447,8 @@ static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v)
> return seq_printf(m, "%u\n", od->od_lockless_truncate);
> }
>
> -static ssize_t osc_lockless_truncate_seq_write(struct file *file, const char *buffer,
> - size_t count, loff_t *off)
> +static ssize_t osc_lockless_truncate_seq_write(struct file *file,
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> struct osc_device *od = obd2osc_dev(obd);
> @@ -472,7 +472,7 @@ static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v)
> }
>
> static ssize_t osc_obd_max_pages_per_rpc_seq_write(struct file *file,
> - const char *buffer, size_t count, loff_t *off)
> + const char __user *buffer, size_t count, loff_t *off)
> {
> struct obd_device *dev = ((struct seq_file *)file->private_data)->private;
> struct client_obd *cli = &dev->u.cli;
> @@ -664,8 +664,8 @@ static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v)
> }
> #undef pct
>
> -static ssize_t osc_rpc_stats_seq_write(struct file *file, const char *buf,
> - size_t len, loff_t *off)
> +static ssize_t osc_rpc_stats_seq_write(struct file *file,
> + const char __user *buf, size_t len, loff_t *off)
> {
> struct seq_file *seq = file->private_data;
> struct obd_device *dev = seq->private;
> @@ -702,7 +702,7 @@ static int osc_stats_seq_show(struct seq_file *seq, void *v)
> return 0;
> }
>
> -static ssize_t osc_stats_seq_write(struct file *file, const char *buf,
> +static ssize_t osc_stats_seq_write(struct file *file, const char __user *buf,
> size_t len, loff_t *off)
> {
> struct seq_file *seq = file->private_data;
> diff --git a/drivers/staging/lustre/lustre/osc/osc_request.c b/drivers/staging/lustre/lustre/osc/osc_request.c
> index b9450b9..ca65d92 100644
> --- a/drivers/staging/lustre/lustre/osc/osc_request.c
> +++ b/drivers/staging/lustre/lustre/osc/osc_request.c
> @@ -2598,7 +2598,7 @@ static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
> /* we only need the header part from user space to get lmm_magic and
> * lmm_stripe_count, (the header part is common to v1 and v3) */
> lum_size = sizeof(struct lov_user_md_v1);
> - if (copy_from_user(&lum, lump, lum_size))
> + if (copy_from_user(&lum, (void __user *)lump, lum_size))
> return -EFAULT;
>
> if ((lum.lmm_magic != LOV_USER_MAGIC_V1) &&
> @@ -2632,7 +2632,7 @@ static int osc_getstripe(struct lov_stripe_md *lsm, struct lov_user_md *lump)
> lumk->lmm_oi = lsm->lsm_oi;
> lumk->lmm_stripe_count = 1;
>
> - if (copy_to_user(lump, lumk, lum_size))
> + if (copy_to_user((void __user *)lump, lumk, lum_size))
> rc = -EFAULT;
>
> if (lumk != &lum)
> @@ -2691,7 +2691,7 @@ static int osc_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
>
> memcpy(data->ioc_inlbuf2, &obd->obd_uuid, sizeof(uuid));
>
> - err = copy_to_user((void *)uarg, buf, len);
> + err = copy_to_user((void __user *)uarg, buf, len);
> if (err)
> err = -EFAULT;
> obd_ioctl_freedata(buf, len);
> diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
> index 4011e00..0fb32e8 100644
> --- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
> +++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
> @@ -1223,7 +1223,7 @@ EXPORT_SYMBOL(lprocfs_wr_evict_client);
>
> #undef BUFLEN
>
> -int lprocfs_wr_ping(struct file *file, const char *buffer,
> +int lprocfs_wr_ping(struct file *file, const char __user *buffer,
> size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> @@ -1251,7 +1251,7 @@ EXPORT_SYMBOL(lprocfs_wr_ping);
> * The connection UUID is a node's primary NID. For example,
> * "echo connection=192.168.0.1@tcp0::instance > .../import".
> */
> -int lprocfs_wr_import(struct file *file, const char *buffer,
> +int lprocfs_wr_import(struct file *file, const char __user *buffer,
> size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
> @@ -1329,7 +1329,7 @@ int lprocfs_rd_pinger_recov(struct seq_file *m, void *n)
> }
> EXPORT_SYMBOL(lprocfs_rd_pinger_recov);
>
> -int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
> +int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
> size_t count, loff_t *off)
> {
> struct obd_device *obd = ((struct seq_file *)file->private_data)->private;



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