net: dsa: Remove VLA usage
We avoid 2 VLAs by using a pre-allocated field in dsa_switch. We also
try to avoid dynamic allocation whenever possible (when using fewer than
bits-per-long ports, which is the common case).
Link: http://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1RqZWA@mail.gmail.com
Link: http://lkml.kernel.org/r/20180505185145.GB32630@lunn.ch
Signed-off-by: Salvatore Mesoraca <s.mesoraca16@gmail.com>
[kees: tweak commit subject and message slightly]
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/dsa.h b/include/net/dsa.h
index fdbd608..461e8a7 100644
--- a/include/net/dsa.h
+++ b/include/net/dsa.h
@@ -259,6 +259,9 @@ struct dsa_switch {
/* Number of switch port queues */
unsigned int num_tx_queues;
+ unsigned long *bitmap;
+ unsigned long _bitmap;
+
/* Dynamically allocated ports, keep last */
size_t num_ports;
struct dsa_port ports[];