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Subject[PATCH 06/15] staging: lustre: lnet: use kmalloc/kvmalloc in router_proc
The buffers allocated in router_proc are to temporarily
hold strings created for procfs files.
So they do not need to be zeroed and are safe to use
GFP_KERNEL.
So use kmalloc() directly except in two cases where it
isn't trivial to confirm that the size is always small.
In those cases, use kvmalloc().

Signed-off-by: NeilBrown <neilb@suse.com>
---
drivers/staging/lustre/lnet/lnet/router_proc.c | 34 ++++++++++++------------
1 file changed, 17 insertions(+), 17 deletions(-)

diff --git a/drivers/staging/lustre/lnet/lnet/router_proc.c b/drivers/staging/lustre/lnet/lnet/router_proc.c
index 06e20b314520..8d6d6b4d6619 100644
--- a/drivers/staging/lustre/lnet/lnet/router_proc.c
+++ b/drivers/staging/lustre/lnet/lnet/router_proc.c
@@ -95,7 +95,7 @@ static int __proc_lnet_stats(void *data, int write,
if (!ctrs)
return -ENOMEM;

- LIBCFS_ALLOC(tmpstr, tmpsiz);
+ tmpstr = kmalloc(tmpsiz, GFP_KERNEL);
if (!tmpstr) {
kfree(ctrs);
return -ENOMEM;
@@ -118,7 +118,7 @@ static int __proc_lnet_stats(void *data, int write,
rc = cfs_trace_copyout_string(buffer, nob,
tmpstr + pos, "\n");

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);
kfree(ctrs);
return rc;
}
@@ -151,7 +151,7 @@ static int proc_lnet_routes(struct ctl_table *table, int write,
if (!*lenp)
return 0;

- LIBCFS_ALLOC(tmpstr, tmpsiz);
+ tmpstr = kmalloc(tmpsiz, GFP_KERNEL);
if (!tmpstr)
return -ENOMEM;

@@ -183,7 +183,7 @@ static int proc_lnet_routes(struct ctl_table *table, int write,

if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
lnet_net_unlock(0);
- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);
return -ESTALE;
}

@@ -248,7 +248,7 @@ static int proc_lnet_routes(struct ctl_table *table, int write,
}
}

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);

if (!rc)
*lenp = len;
@@ -275,7 +275,7 @@ static int proc_lnet_routers(struct ctl_table *table, int write,
if (!*lenp)
return 0;

- LIBCFS_ALLOC(tmpstr, tmpsiz);
+ tmpstr = kmalloc(tmpsiz, GFP_KERNEL);
if (!tmpstr)
return -ENOMEM;

@@ -303,7 +303,7 @@ static int proc_lnet_routers(struct ctl_table *table, int write,
if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
lnet_net_unlock(0);

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);
return -ESTALE;
}

@@ -385,7 +385,7 @@ static int proc_lnet_routers(struct ctl_table *table, int write,
}
}

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);

if (!rc)
*lenp = len;
@@ -418,7 +418,7 @@ static int proc_lnet_peers(struct ctl_table *table, int write,
return 0;
}

- LIBCFS_ALLOC(tmpstr, tmpsiz);
+ tmpstr = kmalloc(tmpsiz, GFP_KERNEL);
if (!tmpstr)
return -ENOMEM;

@@ -448,7 +448,7 @@ static int proc_lnet_peers(struct ctl_table *table, int write,

if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
lnet_net_unlock(cpt);
- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);
return -ESTALE;
}

@@ -556,7 +556,7 @@ static int proc_lnet_peers(struct ctl_table *table, int write,
*ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
}

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kfree(tmpstr);

if (!rc)
*lenp = len;
@@ -579,7 +579,7 @@ static int __proc_lnet_buffers(void *data, int write,

/* (4 %d) * 4 * LNET_CPT_NUMBER */
tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
- LIBCFS_ALLOC(tmpstr, tmpsiz);
+ tmpstr = kvmalloc(tmpsiz, GFP_KERNEL);
if (!tmpstr)
return -ENOMEM;

@@ -618,7 +618,7 @@ static int __proc_lnet_buffers(void *data, int write,
rc = cfs_trace_copyout_string(buffer, nob,
tmpstr + pos, NULL);

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kvfree(tmpstr);
return rc;
}

@@ -643,7 +643,7 @@ static int proc_lnet_nis(struct ctl_table *table, int write,
if (!*lenp)
return 0;

- LIBCFS_ALLOC(tmpstr, tmpsiz);
+ tmpstr = kvmalloc(tmpsiz, GFP_KERNEL);
if (!tmpstr)
return -ENOMEM;

@@ -744,7 +744,7 @@ static int proc_lnet_nis(struct ctl_table *table, int write,
*ppos += 1;
}

- LIBCFS_FREE(tmpstr, tmpsiz);
+ kvfree(tmpstr);

if (!rc)
*lenp = len;
@@ -795,7 +795,7 @@ static int __proc_lnet_portal_rotor(void *data, int write,
int rc;
int i;

- LIBCFS_ALLOC(buf, buf_len);
+ buf = kmalloc(buf_len, GFP_KERNEL);
if (!buf)
return -ENOMEM;

@@ -843,7 +843,7 @@ static int __proc_lnet_portal_rotor(void *data, int write,
}
lnet_res_unlock(0);
out:
- LIBCFS_FREE(buf, buf_len);
+ kfree(buf);
return rc;
}


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