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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/lustre/lnet/lnet/router_proc.c b/drivers/staging/lustre/lnet/lnet/router_proc.c
index 43038f930ba1e27dbc4506dc1cee161bdfa87cdc..1a71ffebc889b73a70236b92c11c9a49429cf0d7 100644 (file)
--- 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;
 }