[NET]: Fix heavy stack usage in seq_file output routines.
Plan C: we can follow the Al Viro's proposal about %n like in this patch.
The same applies to udp, fib (the /proc/net/route file), rt_cache and
sctp debug. This is minus ~150-200 bytes for each.
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/sctp/objcnt.c b/net/sctp/objcnt.c
index cfeb07e..f73ec0e 100644
--- a/net/sctp/objcnt.c
+++ b/net/sctp/objcnt.c
@@ -83,13 +83,12 @@
*/
static int sctp_objcnt_seq_show(struct seq_file *seq, void *v)
{
- int i;
- char temp[128];
+ int i, len;
i = (int)*(loff_t *)v;
- sprintf(temp, "%s: %d", sctp_dbg_objcnt[i].label,
- atomic_read(sctp_dbg_objcnt[i].counter));
- seq_printf(seq, "%-127s\n", temp);
+ seq_printf(seq, "%s: %d%n", sctp_dbg_objcnt[i].label,
+ atomic_read(sctp_dbg_objcnt[i].counter), &len);
+ seq_printf(seq, "%*s\n", 127 - len, "");
return 0;
}