[PATCH] staging: lustre: fix sparse warning on LPROC_SEQ_FOPS macros

Tristan Lelong
2014-12-05T08:03:53Z

This patch fix a sparse warning in lustre sources

warning: incorrect type in argument 1 (different address spaces)
expected void [noderef] <asn:1>*to
got char *<noident>

This is done by adding the missing __user attribute on userland pointers inside
the LPROC_SEQ_FOPS-like macros:
- LPROC_SEQ_FOPS
- LPROC_SEQ_FOPS_RW_TYPE
- LPROC_SEQ_FOPS_WR_ONLY
- LDLM_POOL_PROC_WRITER

The patch also updates all the functions that are used by this macro:
- lprocfs_wr_*
- *_seq_write

as well as some helpers used by the previously modified functions (otherwise
fixing the sparse warning add some new ones):
- lprocfs_write_frac_helper
- lprocfs_write_helper
- lprocfs_write_u64_helper

The patch also fixes one __user pointer direct dereference by strncmp
in function fld_proc_hash_seq_write by adding the proper copy_from_user.

Signed-off-by: Tristan Lelong <tristan@lelong.xyz>
---
drivers/staging/lustre/lustre/fld/lproc_fld.c | 14 ++++--
.../staging/lustre/lustre/include/lprocfs_status.h | 44 +++++++++--------
drivers/staging/lustre/lustre/ldlm/ldlm_internal.h | 5 +-
drivers/staging/lustre/lustre/ldlm/ldlm_pool.c | 4 +-
drivers/staging/lustre/lustre/ldlm/ldlm_resource.c | 7 +--
drivers/staging/lustre/lustre/lov/lproc_lov.c | 20 +++++---
drivers/staging/lustre/lustre/mdc/lproc_mdc.c | 7 +--
.../lustre/lustre/obdclass/linux/linux-module.c | 5 +-
.../lustre/lustre/obdclass/lprocfs_status.c | 2 +-
drivers/staging/lustre/lustre/osc/lproc_osc.c | 57 +++++++++++++---------
.../staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c | 25 +++++-----
11 files changed, 114 insertions(+), 76 deletions(-)

diff --git a/drivers/staging/lustre/lustre/fld/lproc_fld.c b/drivers/staging/lustre/lustre/fld/lproc_fld.c
index 95e7de1..9f1db6c 100644
--- a/drivers/staging/lustre/lustre/fld/lproc_fld.c
+++ b/drivers/staging/lustre/lustre/fld/lproc_fld.c
@@ -87,13 +87,21 @@ fld_proc_hash_seq_show(struct seq_file *m, void *unused)
}

static ssize_t
-fld_proc_hash_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+fld_proc_hash_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct lu_client_fld *fld;
struct lu_fld_hash *hash = NULL;
+ char name[80];
int i;

+ if (count > 80)
+ return -ENAMETOOLONG;
+
+ if (copy_from_user(name, buffer, count) != 0)
+ return -EFAULT;
+
fld = ((struct seq_file *)file->private_data)->private;
LASSERT(fld != NULL);

@@ -101,7 +109,7 @@ fld_proc_hash_seq_write(struct file *file, const char *buffer,
if (count != strlen(fld_hash[i].fh_name))
continue;

- if (!strncmp(fld_hash[i].fh_name, buffer, count)) {
+ if (!strncmp(fld_hash[i].fh_name, name, count)) {
hash = &fld_hash[i];
break;
}
diff --git a/drivers/staging/lustre/lustre/include/lprocfs_status.h b/drivers/staging/lustre/lustre/include/lprocfs_status.h
index cfe503b..8a25cf6 100644
--- a/drivers/staging/lustre/lustre/include/lprocfs_status.h
+++ b/drivers/staging/lustre/lustre/include/lprocfs_status.h
@@ -627,16 +627,16 @@ struct adaptive_timeout;
extern int lprocfs_at_hist_helper(struct seq_file *m,
struct adaptive_timeout *at);
extern int lprocfs_rd_timeouts(struct seq_file *m, void *data);
-extern int lprocfs_wr_timeouts(struct file *file, const char *buffer,
+extern int lprocfs_wr_timeouts(struct file *file, const char __user *buffer,
unsigned long count, void *data);
-extern int lprocfs_wr_evict_client(struct file *file, const char *buffer,
+extern int lprocfs_wr_evict_client(struct file *file, const char __user *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,
+extern int lprocfs_wr_pinger_recov(struct file *file, const char __user *buffer,
size_t count, loff_t *off);

/* Statfs helpers */
@@ -650,8 +650,8 @@ 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_u64_helper(const char __user *buffer,
+ unsigned long count, __u64 *val);
extern int lprocfs_write_frac_u64_helper(const char *buffer,
unsigned long count,
__u64 *val, int mult);
@@ -716,7 +716,8 @@ 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 +727,8 @@ 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); \
} \
@@ -939,20 +941,24 @@ static inline int lprocfs_at_hist_helper(struct seq_file *m,
static inline int lprocfs_rd_timeouts(struct seq_file *m, void *data)
{ return 0; }
static inline int lprocfs_wr_timeouts(struct file *file,
- const char *buffer,
- unsigned long count, void *data)
+ const char __user *buffer,
+ unsigned long count, void *data)
{ return 0; }
-static inline int lprocfs_wr_evict_client(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_evict_client(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
-static inline int lprocfs_wr_ping(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_ping(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
-static inline int lprocfs_wr_import(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_import(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }
-static inline int lprocfs_wr_pinger_recov(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static inline int lprocfs_wr_pinger_recov(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{ return 0; }

/* Statfs helpers */
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h b/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h
index 6c6c57c..20e64cd 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_internal.h
@@ -249,8 +249,9 @@ typedef enum ldlm_policy_res ldlm_policy_res_t;
struct __##var##__dummy_read {; } /* semicolon catcher */

#define LDLM_POOL_PROC_WRITER(var, type) \
- static int lprocfs_wr_##var(struct file *file, const char *buffer, \
- unsigned long count, void *data) \
+ static int lprocfs_wr_##var(struct file *file, \
+ const char __user *buffer, \
+ unsigned long count, void *data) \
{ \
struct ldlm_pool *pl = data; \
type tmp; \
diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
index 4c838f6..142b3dd 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_pool.c
@@ -697,8 +697,8 @@ LPROC_SEQ_FOPS_RO(lprocfs_grant_plan);
LDLM_POOL_PROC_READER_SEQ_SHOW(recalc_period, int);
LDLM_POOL_PROC_WRITER(recalc_period, int);
static ssize_t lprocfs_recalc_period_seq_write(struct file *file,
- const char *buf, size_t len,
- loff_t *off)
+ const char __user *buf,
+ size_t len, loff_t *off)
{
struct seq_file *seq = file->private_data;

diff --git a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
index 1f150e4..c6f62a9 100644
--- a/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
+++ b/drivers/staging/lustre/lustre/ldlm/ldlm_resource.c
@@ -72,7 +72,7 @@ extern unsigned int ldlm_cancel_unused_locks_before_replay;
unsigned int ldlm_dump_granted_max = 256;

#if defined(CONFIG_PROC_FS)
-static ssize_t lprocfs_wr_dump_ns(struct file *file, const char *buffer,
+static ssize_t lprocfs_wr_dump_ns(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
ldlm_dump_all_namespaces(LDLM_NAMESPACE_SERVER, D_DLMTRACE);
@@ -287,8 +287,9 @@ static int lprocfs_elc_seq_show(struct seq_file *m, void *v)
return lprocfs_rd_uint(m, &supp);
}

-static ssize_t lprocfs_elc_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lprocfs_elc_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ldlm_namespace *ns = ((struct seq_file *)file->private_data)->private;
unsigned int supp = -1;
diff --git a/drivers/staging/lustre/lustre/lov/lproc_lov.c b/drivers/staging/lustre/lustre/lov/lproc_lov.c
index c993f25..c99f2f4 100644
--- a/drivers/staging/lustre/lustre/lov/lproc_lov.c
+++ b/drivers/staging/lustre/lustre/lov/lproc_lov.c
@@ -51,8 +51,9 @@ static int lov_stripesize_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%llu\n", desc->ld_default_stripe_size);
}

-static ssize_t lov_stripesize_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripesize_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 lov_desc *desc;
@@ -81,8 +82,9 @@ static int lov_stripeoffset_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%llu\n", desc->ld_default_stripe_offset);
}

-static ssize_t lov_stripeoffset_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripeoffset_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 lov_desc *desc;
@@ -110,8 +112,9 @@ static int lov_stripetype_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%u\n", desc->ld_pattern);
}

-static ssize_t lov_stripetype_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripetype_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 lov_desc *desc;
@@ -140,8 +143,9 @@ static int lov_stripecount_seq_show(struct seq_file *m, void *v)
(__s16)(desc->ld_default_stripe_count + 1) - 1);
}

-static ssize_t lov_stripecount_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t lov_stripecount_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 lov_desc *desc;
diff --git a/drivers/staging/lustre/lustre/mdc/lproc_mdc.c b/drivers/staging/lustre/lustre/mdc/lproc_mdc.c
index 16341c8..c420219 100644
--- a/drivers/staging/lustre/lustre/mdc/lproc_mdc.c
+++ b/drivers/staging/lustre/lustre/mdc/lproc_mdc.c
@@ -52,7 +52,7 @@ static int mdc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v)
}

static ssize_t mdc_max_rpcs_in_flight_seq_write(struct file *file,
- const char *buffer,
+ const char __user *buffer,
size_t count,
loff_t *off)
{
@@ -82,8 +82,9 @@ static int mdc_kuc_open(struct inode *inode, struct file *file)
}

/* temporary for testing */
-static ssize_t mdc_kuc_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t mdc_kuc_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;
diff --git a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
index 66ceab2..b5007b8 100644
--- a/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
+++ b/drivers/staging/lustre/lustre/obdclass/linux/linux-module.c
@@ -272,8 +272,9 @@ static int obd_proc_jobid_var_seq_show(struct seq_file *m, void *v)
return seq_printf(m, "%s\n", obd_jobid_var);
}

-static ssize_t obd_proc_jobid_var_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+static ssize_t obd_proc_jobid_var_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
if (!count || count > JOBSTATS_JOBID_VAR_MAX_LEN)
return -EINVAL;
diff --git a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
index 3b7dfc3..f78a241 100644
--- a/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
+++ b/drivers/staging/lustre/lustre/obdclass/lprocfs_status.c
@@ -1849,7 +1849,7 @@ 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);
diff --git a/drivers/staging/lustre/lustre/osc/lproc_osc.c b/drivers/staging/lustre/lustre/osc/lproc_osc.c
index 9f719bc..8e22e45 100644
--- a/drivers/staging/lustre/lustre/osc/lproc_osc.c
+++ b/drivers/staging/lustre/lustre/osc/lproc_osc.c
@@ -53,8 +53,9 @@ 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 +89,8 @@ 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 +132,9 @@ 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 +236,9 @@ 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 +294,8 @@ 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 +327,9 @@ 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;
@@ -362,7 +368,8 @@ 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,
+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;
@@ -401,8 +408,9 @@ 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 +436,9 @@ 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 +456,9 @@ 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 +482,8 @@ 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 +675,9 @@ 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;
@@ -702,8 +714,9 @@ 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,
- size_t len, loff_t *off)
+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;
struct obd_device *dev = seq->private;
diff --git a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
index 4011e00..7b22afd 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/lproc_ptlrpc.c
@@ -284,8 +284,9 @@ ptlrpc_lprocfs_req_history_max_seq_show(struct seq_file *m, void *n)
}

static ssize_t
-ptlrpc_lprocfs_req_history_max_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+ptlrpc_lprocfs_req_history_max_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
int bufpages;
@@ -329,8 +330,9 @@ ptlrpc_lprocfs_threads_min_seq_show(struct seq_file *m, void *n)
}

static ssize_t
-ptlrpc_lprocfs_threads_min_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+ptlrpc_lprocfs_threads_min_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
int val;
@@ -381,8 +383,9 @@ ptlrpc_lprocfs_threads_max_seq_show(struct seq_file *m, void *n)
}

static ssize_t
-ptlrpc_lprocfs_threads_max_seq_write(struct file *file, const char *buffer,
- size_t count, loff_t *off)
+ptlrpc_lprocfs_threads_max_seq_write(struct file *file,
+ const char __user *buffer,
+ size_t count, loff_t *off)
{
struct ptlrpc_service *svc = ((struct seq_file *)file->private_data)->private;
int val;
@@ -1025,7 +1028,7 @@ static int ptlrpc_lprocfs_hp_ratio_seq_show(struct seq_file *m, void *v)
}

static ssize_t ptlrpc_lprocfs_hp_ratio_seq_write(struct file *file,
- const char *buffer,
+ const char __user *buffer,
size_t count,
loff_t *off)
{
@@ -1175,7 +1178,7 @@ EXPORT_SYMBOL(ptlrpc_lprocfs_unregister_obd);

#define BUFLEN (UUID_MAX + 5)

-int lprocfs_wr_evict_client(struct file *file, const char *buffer,
+int lprocfs_wr_evict_client(struct file *file, const char __user *buffer,
size_t count, loff_t *off)
{
struct obd_device *obd = ((struct seq_file *)file->private_data)->private;
@@ -1223,7 +1226,7 @@ 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 +1254,7 @@ 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 +1332,7 @@ 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;
--
2.1.1