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staging: lustre: lnet: use kmalloc/kvmalloc in router_proc

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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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
NeilBrown 2018-01-09 12:19:38 +11:00 committed by Greg Kroah-Hartman
parent b9c4b8a15a
commit 2aa8b1b728
1 changed files with 17 additions and 17 deletions
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34
drivers/staging/lustre/lnet/lnet/router_proc.c
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@ -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;
}