tridentfb.c, kernel 2.5.30, compile error

[phil]

gcc -Wp,-MD,./.tridentfb.o.d -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -Wno-trigraphs -O2
-fomit-frame-pointer -fno-strict-aliasing -fno-common -pipe -mpreferred-stack-boundary=2 -march=k6 -nostdinc -iwithprefix
include    -DKBUILD_BASENAME=tridentfb   -c -o tridentfb.o tridentfb.c
tridentfb.c:64: field `gen' has incomplete type
tridentfb.c: In function `trident_set_disp':
tridentfb.c:1054: dereferencing pointer to incomplete type
tridentfb.c: At top level:
tridentfb.c:1086: variable `trident_hwswitch' has initializer but incomplete type
tridentfb.c:1087: warning: excess elements in struct initializer
tridentfb.c:1087: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1088: warning: excess elements in struct initializer
tridentfb.c:1088: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1089: warning: excess elements in struct initializer
tridentfb.c:1089: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1090: warning: excess elements in struct initializer
tridentfb.c:1090: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1091: warning: excess elements in struct initializer
tridentfb.c:1091: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1092: warning: excess elements in struct initializer
tridentfb.c:1092: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1093: warning: excess elements in struct initializer
tridentfb.c:1093: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1094: warning: excess elements in struct initializer
tridentfb.c:1094: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1095: warning: excess elements in struct initializer
tridentfb.c:1095: warning: (near initialization for `trident_hwswitch')
tridentfb.c:1097: warning: excess elements in struct initializer
tridentfb.c:1097: warning: (near initialization for `trident_hwswitch')
tridentfb.c: In function `tridentfb_init':
tridentfb.c:1204: `fbgen_switch' undeclared (first use in this function)
tridentfb.c:1204: (Each undeclared identifier is reported only once
tridentfb.c:1204: for each function it appears in.)
tridentfb.c:1205: `fbgen_update_var' undeclared (first use in this function)
tridentfb.c:1228: warning: implicit declaration of function `fbgen_get_var'
tridentfb.c:1230: warning: implicit declaration of function `fbgen_set_disp'
tridentfb.c: At top level:
tridentfb.c:1289: `fbgen_get_fix' undeclared here (not in a function)
tridentfb.c:1289: initializer element is not constant
tridentfb.c:1289: (near initialization for `tridentfb_ops.fb_get_fix')
tridentfb.c:1290: `fbgen_get_var' undeclared here (not in a function)
tridentfb.c:1290: initializer element is not constant
tridentfb.c:1290: (near initialization for `tridentfb_ops.fb_get_var')
tridentfb.c:1291: `fbgen_set_var' undeclared here (not in a function)
tridentfb.c:1291: initializer element is not constant
tridentfb.c:1291: (near initialization for `tridentfb_ops.fb_set_var')
tridentfb.c:1292: `fbgen_get_cmap' undeclared here (not in a function)
tridentfb.c:1292: initializer element is not constant
tridentfb.c:1292: (near initialization for `tridentfb_ops.fb_get_cmap')
tridentfb.c:1293: `fbgen_set_cmap' undeclared here (not in a function)
tridentfb.c:1293: initializer element is not constant
tridentfb.c:1293: (near initialization for `tridentfb_ops.fb_set_cmap')
tridentfb.c:1295: `fbgen_pan_display' undeclared here (not in a function)
tridentfb.c:1295: initializer element is not constant
tridentfb.c:1295: (near initialization for `tridentfb_ops.fb_pan_display')
tridentfb.c:1296: initializer element is not constant
tridentfb.c:1296: (near initialization for `tridentfb_ops')
tridentfb.c:1296: initializer element is not constant
tridentfb.c:1296: (near initialization for `tridentfb_ops')
tridentfb.c:1296: initializer element is not constant
tridentfb.c:1296: (near initialization for `tridentfb_ops')
tridentfb.c:1296: initializer element is not constant
tridentfb.c:1296: (near initialization for `tridentfb_ops')
tridentfb.c:1296: initializer element is not constant
tridentfb.c:1296: (near initialization for `tridentfb_ops')
tridentfb.c:1296: initializer element is not constant
tridentfb.c:1296: (near initialization for `tridentfb_ops')