Defined in 2 files as a macro:

• sys/dev/oce/oce_if.h, line 289 (as a macro)
• sys/xen/interface/io/ring.h, line 188 (as a macro)

Referenced in 2 files:

• sys/dev/xen/blkfront/blkfront.c, line 429
• sys/dev/xen/netfront/netfront.c, line 2139