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netfront.c: avoid gcc variably-modified warning

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gcc produces a "variably modified X at file scope" warning for
structures that use these size definitions.  I think the definitions are
actually fine but can be rephrased with the __CONST_RING_SIZE macro more
cleanly anyway.

Reviewed by:	markj, royger
Approved by:	markj (mentor)
Sponsored by:	Dell EMC Isilon
Differential revision:	https://reviews.freebsd.org/D11417
This commit is contained in:
Ryan Libby 2017-06-30 22:14:22 +00:00
parent 5a62cbcaad
commit 98018db419
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=320517
1 changed files with 2 additions and 2 deletions
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sys/dev/xen/netfront/netfront.c
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@ -74,8 +74,8 @@ __FBSDID("$FreeBSD$");
/* Features supported by all backends. TSO and LRO can be negotiated */
#define XN_CSUM_FEATURES (CSUM_TCP | CSUM_UDP)
#define NET_TX_RING_SIZE __RING_SIZE((netif_tx_sring_t *)0, PAGE_SIZE)
#define NET_RX_RING_SIZE __RING_SIZE((netif_rx_sring_t *)0, PAGE_SIZE)
#define NET_TX_RING_SIZE __CONST_RING_SIZE(netif_tx, PAGE_SIZE)
#define NET_RX_RING_SIZE __CONST_RING_SIZE(netif_rx, PAGE_SIZE)
#define NET_RX_SLOTS_MIN (XEN_NETIF_NR_SLOTS_MIN + 1)