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| author |   Florian Fainelli <f.fainelli@gmail.com> | 2018-04-27 13:11:14 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2018-04-29 22:50:36 -0400 |
| commit | 3ac305c386f698abccd0523c64a8aef248c89bc6 (patch) | |
| tree | 560ca8bcc6bae44af98c94846a52962094bca987 /include/linux/netdevice.h | |
| parent | Merge branch 'net-cleanup-skb_tx_hash' (diff) | |
| download | linux-dev-3ac305c386f698abccd0523c64a8aef248c89bc6.tar.xz linux-dev-3ac305c386f698abccd0523c64a8aef248c89bc6.zip | |
net: core: Assert the size of netdev_featres_t
We have about 53 netdev_features_t bits defined and counting, add a
build time check to catch when an u64 type will not be enough and we
will have to convert that to a bitmap. This is done in
register_netdevice() for convenience.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/netdevice.h')
| -rw-r--r-- | include/linux/netdevice.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h index 82f5a9aba578..9e09dd897b74 100644 --- a/include/linux/netdevice.h +++ b/include/linux/netdevice.h @@ -4108,6 +4108,12 @@ const char *netdev_drivername(const struct net_device *dev); void linkwatch_run_queue(void); +static inline void netdev_features_size_check(void) +{ + BUILD_BUG_ON(sizeof(netdev_features_t) * BITS_PER_BYTE < + NETDEV_FEATURE_COUNT); +} + static inline netdev_features_t netdev_intersect_features(netdev_features_t f1, netdev_features_t f2) { |