OpenWrt Forum Archive

Topic: How to add extra dependencies to kernel modules

The content of this topic has been archived on 21 Apr 2018. There are no obvious gaps in this topic, but there may still be some posts missing at the end.

Post #1
bogdanul2003
31 Jan 2015, 11:25

Hello,

I'm trying to add fbtft kernel module as an external package in openwrt by copying all necessary files in /package/fbtft directory like this guy did https://github.com/GBert/openwrt-misc/tree/master/fbtft

The problem is that fbtft is compiled using -DCONFIG_FB_DEFERRED_IO=1 . This define is used by some framebuffer structures like fb_info from fb.h. If CONFIG_FB_DEFERRED_IO is defined then the structure has a different size.
Now linux frame buffer files like fbsysfs.c, which uses this fb_info strucure, are not compiled with this CONFIG_FB_DEFERRED_IO flag which causes fb_info to have a different size. Fbtft uses fbsysfs.c to allocate memory for fb_info structure but the size is different between the two because they are not compiled with the same flags.

I tried to add FB_BROADSHEET and FB_AUO_K190X (which depend on FB_DEFERRED_IO) from "make kernel_menuconfig" but fbsysfs.c and other framebuffer files are still not compiled with the required flag (i can see this by looking at .fbsysfs.o.cmd file).
How can I add -DCONFIG_FB_DEFERRED_IO=1 flag at compile time for all linux framebuffer files so they all have the correct fb_info structure ?

Thanks

(Last edited by bogdanul2003 on 2 Feb 2015, 12:28)

Post #2
bogdanul2003
2 Feb 2015, 12:29

Modified the previous thread and made the question more precise

Post #3
bogdanul2003
2 Feb 2015, 19:21

I checked my .config file from build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28 and I found this :
CONFIG_FB_DEFERRED_IO=y

It seems that deferrred IO is defined but it's not used at compile time.
For example I enabled FB_AUO_K190X which 

config FB_AUO_K190X
    tristate "AUO-K190X EPD controller support"
    depends on FB
    select FB_SYS_FILLRECT
    select FB_SYS_COPYAREA
    select FB_SYS_IMAGEBLIT
    select FB_SYS_FOPS
    select FB_DEFERRED_IO

As you can see it depends on FB_DEFERRED_IO and auo_k190x.c includes fb.h and uses fb_info structure which must be compiled with -DCONFIG_FB_DEFERRED_IO=1 in order for deffer IO to work correctly.

In .auo_k190x.o.cmd there is no trace of this define ( -DCONFIG_FB_DEFERRED_IO=1) which means that fb_info structure will not be compiled correctly.

cmd_drivers/video/auo_k190x.o := mips-openwrt-linux-uclibc-gcc -Wp,-MD,drivers/video/.auo_k190x.o.d  -nostdinc -isystem /home/boil/Documents/opewrt/openwrt/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/lib/gcc/mips-openwrt-linux-uclibc/4.8.3/include -I/home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include -Iarch/mips/include/generated  -Iinclude -I/home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi -Iarch/mips/include/generated/uapi -I/home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi -Iinclude/generated/uapi -include /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/linux/kconfig.h -D__KERNEL__ -DVMLINUX_LOAD_ADDRESS=0xffffffff80060000 -DDATAOFFSET=0 -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs -fno-strict-aliasing -fno-common -Werror-implicit-function-declaration -Wno-format-security -fno-delete-null-pointer-checks -Os -fno-caller-saves -Wno-maybe-uninitialized -mno-check-zero-division -mabi=32 -G 0 -mno-abicalls -fno-pic -pipe -mno-branch-likely -msoft-float -ffreestanding -march=mips32r2 -Wa,-mips32r2 -Wa,--trap -I/home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mach-ath79 -I/home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mach-generic -Wframe-larger-than=1024 -fno-stack-protector -Wno-unused-but-set-variable -fomit-frame-pointer -fno-var-tracking-assignments -g -femit-struct-debug-baseonly -fno-var-tracking -Wdeclaration-after-statement -Wno-pointer-sign -fno-strict-overflow -fconserve-stack -Werror=implicit-int -Werror=strict-prototypes -DCC_HAVE_ASM_GOTO   -ffunction-sections -fdata-sections  -D"KBUILD_STR(s)=\#s" -D"KBUILD_BASENAME=KBUILD_STR(auo_k190x)"  -D"KBUILD_MODNAME=KBUILD_STR(auo_k190x)" -c -o drivers/video/auo_k190x.o drivers/video/auo_k190x.c

source_drivers/video/auo_k190x.o := drivers/video/auo_k190x.c

deps_drivers/video/auo_k190x.o := \
    $(wildcard include/config/pm.h) \
  include/linux/module.h \
    $(wildcard include/config/module/stripped.h) \
    $(wildcard include/config/sysfs.h) \
    $(wildcard include/config/modules.h) \
    $(wildcard include/config/unused/symbols.h) \
    $(wildcard include/config/module/sig.h) \
    $(wildcard include/config/generic/bug.h) \
    $(wildcard include/config/kallsyms.h) \
    $(wildcard include/config/smp.h) \
    $(wildcard include/config/tracepoints.h) \
    $(wildcard include/config/tracing.h) \
    $(wildcard include/config/event/tracing.h) \
    $(wildcard include/config/ftrace/mcount/record.h) \
    $(wildcard include/config/module/unload.h) \
    $(wildcard include/config/constructors.h) \
    $(wildcard include/config/debug/set/module/ronx.h) \
  include/linux/list.h \
    $(wildcard include/config/debug/list.h) \
  include/linux/types.h \
    $(wildcard include/config/uid16.h) \
    $(wildcard include/config/lbdaf.h) \
    $(wildcard include/config/arch/dma/addr/t/64bit.h) \
    $(wildcard include/config/phys/addr/t/64bit.h) \
    $(wildcard include/config/64bit.h) \
  include/uapi/linux/types.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/types.h \
    $(wildcard include/config/64bit/phys/addr.h) \
  include/asm-generic/int-ll64.h \
  include/uapi/asm-generic/int-ll64.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/bitsperlong.h \
  include/asm-generic/bitsperlong.h \
  include/uapi/asm-generic/bitsperlong.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/types.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/posix_types.h \
  include/linux/stddef.h \
  include/uapi/linux/stddef.h \
  include/linux/compiler.h \
    $(wildcard include/config/sparse/rcu/pointer.h) \
    $(wildcard include/config/trace/branch/profiling.h) \
    $(wildcard include/config/profile/all/branches.h) \
    $(wildcard include/config/enable/must/check.h) \
    $(wildcard include/config/enable/warn/deprecated.h) \
    $(wildcard include/config/kprobes.h) \
  include/linux/compiler-gcc.h \
    $(wildcard include/config/arch/supports/optimized/inlining.h) \
    $(wildcard include/config/optimize/inlining.h) \
  include/linux/compiler-gcc4.h \
    $(wildcard include/config/arch/use/builtin/bswap.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/posix_types.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/sgidefs.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/asm-generic/posix_types.h \
  include/linux/poison.h \
    $(wildcard include/config/illegal/pointer/value.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/const.h \
  include/linux/stat.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/stat.h \
  include/uapi/linux/stat.h \
  include/linux/time.h \
    $(wildcard include/config/arch/uses/gettimeoffset.h) \
  include/linux/cache.h \
    $(wildcard include/config/arch/has/cache/line/size.h) \
  include/uapi/linux/kernel.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/sysinfo.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/cache.h \
    $(wildcard include/config/mips/l1/cache/shift.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mach-generic/kmalloc.h \
    $(wildcard include/config/dma/coherent.h) \
  include/linux/seqlock.h \
    $(wildcard include/config/debug/lock/alloc.h) \
  include/linux/spinlock.h \
    $(wildcard include/config/debug/spinlock.h) \
    $(wildcard include/config/generic/lockbreak.h) \
    $(wildcard include/config/preempt.h) \
  include/linux/typecheck.h \
  include/linux/preempt.h \
    $(wildcard include/config/debug/preempt.h) \
    $(wildcard include/config/preempt/tracer.h) \
    $(wildcard include/config/preempt/count.h) \
    $(wildcard include/config/context/tracking.h) \
    $(wildcard include/config/preempt/notifiers.h) \
  include/linux/linkage.h \
  include/linux/stringify.h \
  include/linux/export.h \
    $(wildcard include/config/have/underscore/symbol/prefix.h) \
    $(wildcard include/config/modversions.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/linkage.h \
  arch/mips/include/generated/asm/preempt.h \
  include/asm-generic/preempt.h \
  include/linux/thread_info.h \
    $(wildcard include/config/compat.h) \
    $(wildcard include/config/debug/stack/usage.h) \
  include/linux/bug.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/bug.h \
    $(wildcard include/config/bug.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/break.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/break.h \
  include/asm-generic/bug.h \
    $(wildcard include/config/generic/bug/relative/pointers.h) \
    $(wildcard include/config/debug/bugverbose.h) \
  include/linux/kernel.h \
    $(wildcard include/config/preempt/voluntary.h) \
    $(wildcard include/config/debug/atomic/sleep.h) \
    $(wildcard include/config/mmu.h) \
    $(wildcard include/config/prove/locking.h) \
    $(wildcard include/config/panic/timeout.h) \
    $(wildcard include/config/ring/buffer.h) \
  /home/boil/Documents/opewrt/openwrt/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/lib/gcc/mips-openwrt-linux-uclibc/4.8.3/include/stdarg.h \
  include/linux/bitops.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/bitops.h \
    $(wildcard include/config/cpu/mipsr2.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/barrier.h \
    $(wildcard include/config/cpu/has/sync.h) \
    $(wildcard include/config/cpu/cavium/octeon.h) \
    $(wildcard include/config/sgi/ip28.h) \
    $(wildcard include/config/cpu/has/wb.h) \
    $(wildcard include/config/weak/ordering.h) \
    $(wildcard include/config/weak/reordering/beyond/llsc.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/addrspace.h \
    $(wildcard include/config/cpu/r8000.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mach-generic/spaces.h \
    $(wildcard include/config/32bit.h) \
    $(wildcard include/config/kvm/guest.h) \
    $(wildcard include/config/dma/noncoherent.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/byteorder.h \
  include/linux/byteorder/big_endian.h \
  include/uapi/linux/byteorder/big_endian.h \
  include/linux/swab.h \
  include/uapi/linux/swab.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/swab.h \
  include/linux/byteorder/generic.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/cpu-features.h \
    $(wildcard include/config/sys/supports/micromips.h) \
    $(wildcard include/config/cpu/mipsr2/irq/vi.h) \
    $(wildcard include/config/cpu/mipsr2/irq/ei.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/cpu.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/cpu-info.h \
    $(wildcard include/config/mips/mt/smp.h) \
    $(wildcard include/config/mips/mt/smtc.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mach-ath79/cpu-feature-overrides.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/war.h \
    $(wildcard include/config/cpu/r4000/workarounds.h) \
    $(wildcard include/config/cpu/r4400/workarounds.h) \
    $(wildcard include/config/cpu/daddi/workarounds.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mach-ath79/war.h \
  include/asm-generic/bitops/non-atomic.h \
  include/asm-generic/bitops/fls64.h \
  include/asm-generic/bitops/ffz.h \
  include/asm-generic/bitops/find.h \
    $(wildcard include/config/generic/find/first/bit.h) \
  include/asm-generic/bitops/sched.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/arch_hweight.h \
  include/asm-generic/bitops/arch_hweight.h \
  include/asm-generic/bitops/const_hweight.h \
  include/asm-generic/bitops/le.h \
  include/asm-generic/bitops/ext2-atomic.h \
  include/linux/log2.h \
    $(wildcard include/config/arch/has/ilog2/u32.h) \
    $(wildcard include/config/arch/has/ilog2/u64.h) \
  include/linux/printk.h \
    $(wildcard include/config/early/printk.h) \
    $(wildcard include/config/printk.h) \
    $(wildcard include/config/dynamic/debug.h) \
  include/linux/init.h \
    $(wildcard include/config/broken/rodata.h) \
  include/linux/kern_levels.h \
  include/linux/dynamic_debug.h \
  include/linux/string.h \
    $(wildcard include/config/binary/printf.h) \
  include/uapi/linux/string.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/string.h \
    $(wildcard include/config/cpu/r3000.h) \
  include/linux/errno.h \
  include/uapi/linux/errno.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/errno.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/errno.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/asm-generic/errno-base.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/div64.h \
  include/asm-generic/div64.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/thread_info.h \
    $(wildcard include/config/page/size/4kb.h) \
    $(wildcard include/config/page/size/8kb.h) \
    $(wildcard include/config/page/size/16kb.h) \
    $(wildcard include/config/page/size/32kb.h) \
    $(wildcard include/config/page/size/64kb.h) \
    $(wildcard include/config/mips/pgd/c0/context.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/processor.h \
    $(wildcard include/config/cavium/octeon/cvmseg/size.h) \
    $(wildcard include/config/cpu/xlp.h) \
    $(wildcard include/config/mips/mt/fpaff.h) \
    $(wildcard include/config/cpu/has/prefetch.h) \
  include/linux/cpumask.h \
    $(wildcard include/config/cpumask/offstack.h) \
    $(wildcard include/config/hotplug/cpu.h) \
    $(wildcard include/config/debug/per/cpu/maps.h) \
    $(wildcard include/config/disable/obsolete/cpumask/functions.h) \
  include/linux/threads.h \
    $(wildcard include/config/nr/cpus.h) \
    $(wildcard include/config/base/small.h) \
  include/linux/bitmap.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/cachectl.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/mipsregs.h \
    $(wildcard include/config/cpu/vr41xx.h) \
    $(wildcard include/config/mips/huge/tlb/support.h) \
    $(wildcard include/config/cpu/micromips.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/hazards.h \
    $(wildcard include/config/cpu/mipsr1.h) \
    $(wildcard include/config/mips/alchemy.h) \
    $(wildcard include/config/cpu/bmips.h) \
    $(wildcard include/config/cpu/loongson2.h) \
    $(wildcard include/config/cpu/r10000.h) \
    $(wildcard include/config/cpu/r5500.h) \
    $(wildcard include/config/cpu/xlr.h) \
    $(wildcard include/config/cpu/sb1.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/prefetch.h \
  include/linux/irqflags.h \
    $(wildcard include/config/trace/irqflags.h) \
    $(wildcard include/config/irqsoff/tracer.h) \
    $(wildcard include/config/trace/irqflags/support.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/irqflags.h \
    $(wildcard include/config/irq/cpu.h) \
  include/linux/bottom_half.h \
  include/linux/preempt_mask.h \
  include/linux/spinlock_types.h \
  include/linux/spinlock_types_up.h \
  include/linux/lockdep.h \
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  include/linux/signal.h \
    $(wildcard include/config/old/sigaction.h) \
  include/uapi/linux/signal.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/signal.h \
    $(wildcard include/config/trad/signals.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/signal.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/asm-generic/signal-defs.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/sigcontext.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/sigcontext.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/siginfo.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/siginfo.h \
  include/asm-generic/siginfo.h \
  include/uapi/asm-generic/siginfo.h \
  include/linux/pid.h \
  include/linux/proportions.h \
  include/linux/percpu_counter.h \
  include/linux/seccomp.h \
    $(wildcard include/config/seccomp.h) \
    $(wildcard include/config/seccomp/filter.h) \
  include/uapi/linux/seccomp.h \
  include/linux/rculist.h \
  include/linux/rtmutex.h \
    $(wildcard include/config/debug/rt/mutexes.h) \
  include/linux/resource.h \
  include/uapi/linux/resource.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/resource.h \
  include/asm-generic/resource.h \
  include/uapi/asm-generic/resource.h \
  include/linux/hrtimer.h \
    $(wildcard include/config/high/res/timers.h) \
    $(wildcard include/config/timerfd.h) \
  include/linux/timerqueue.h \
  include/linux/task_io_accounting.h \
    $(wildcard include/config/task/io/accounting.h) \
  include/linux/latencytop.h \
  include/linux/cred.h \
    $(wildcard include/config/debug/credentials.h) \
    $(wildcard include/config/security.h) \
  include/linux/key.h \
  include/linux/assoc_array.h \
    $(wildcard include/config/associative/array.h) \
  include/linux/selinux.h \
    $(wildcard include/config/security/selinux.h) \
  include/uapi/linux/i2c.h \
  include/linux/fs.h \
    $(wildcard include/config/fs/posix/acl.h) \
    $(wildcard include/config/quota.h) \
    $(wildcard include/config/fsnotify.h) \
    $(wildcard include/config/ima.h) \
    $(wildcard include/config/debug/writecount.h) \
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    $(wildcard include/config/fs/xip.h) \
    $(wildcard include/config/direct/io.h) \
    $(wildcard include/config/migration.h) \
  include/linux/kdev_t.h \
  include/uapi/linux/kdev_t.h \
  include/linux/dcache.h \
  include/linux/rculist_bl.h \
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  include/linux/bit_spinlock.h \
  include/linux/lockref.h \
    $(wildcard include/config/arch/use/cmpxchg/lockref.h) \
  include/linux/path.h \
  include/linux/list_lru.h \
  include/linux/radix-tree.h \
  include/linux/semaphore.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/fiemap.h \
  include/linux/shrinker.h \
  include/linux/migrate_mode.h \
  include/linux/percpu-rwsem.h \
  include/linux/blk_types.h \
    $(wildcard include/config/blk/cgroup.h) \
    $(wildcard include/config/blk/dev/integrity.h) \
  include/uapi/linux/fs.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/limits.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/ioctl.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/ioctl.h \
  include/asm-generic/ioctl.h \
  include/uapi/asm-generic/ioctl.h \
  include/linux/quota.h \
    $(wildcard include/config/quota/netlink/interface.h) \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/linux/dqblk_xfs.h \
  include/linux/dqblk_v1.h \
  include/linux/dqblk_v2.h \
  include/linux/dqblk_qtree.h \
  include/linux/projid.h \
  include/uapi/linux/quota.h \
  include/linux/nfs_fs_i.h \
  include/linux/fcntl.h \
  include/uapi/linux/fcntl.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/uapi/asm/fcntl.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/include/uapi/asm-generic/fcntl.h \
  include/linux/backlight.h \
  include/linux/slab.h \
    $(wildcard include/config/slab/debug.h) \
    $(wildcard include/config/failslab.h) \
    $(wildcard include/config/slob.h) \
    $(wildcard include/config/slab.h) \
    $(wildcard include/config/slub.h) \
    $(wildcard include/config/debug/slab.h) \
  include/linux/kmemleak.h \
    $(wildcard include/config/debug/kmemleak.h) \
  include/linux/slub_def.h \
    $(wildcard include/config/slub/stats.h) \
    $(wildcard include/config/memcg/kmem.h) \
  include/linux/delay.h \
  /home/boil/Documents/opewrt/openwrt/build_dir/target-mips_34kc_uClibc-0.9.33.2/linux-ar71xx_generic/linux-3.14.28/arch/mips/include/asm/delay.h \
  include/linux/uaccess.h \
  include/linux/vmalloc.h \
  include/linux/regulator/consumer.h \
    $(wildcard include/config/regulator.h) \
  include/video/auo_k190xfb.h \
  drivers/video/auo_k190x.h \

drivers/video/auo_k190x.o: $(deps_drivers/video/auo_k190x.o)

$(deps_drivers/video/auo_k190x.o):

Is there something wrong with the build tools? Is there another way to add those defines ?

(Last edited by bogdanul2003 on 2 Feb 2015, 19:23)

Post #4
bogdanul2003
3 Feb 2015, 09:42

One more question: if CONFIG_FB_DEFERRED_IO=y in .config file all files should be compiled with -DCONFIG_FB_DEFERRED_IO=1 ? How does the build tool choose what files are compiled with what define flags ?

Post #5
bogdanul2003
4 Feb 2015, 09:42

To answer my own question:
Step by step I got to read kbuild documentation and it seems that frame buffer files don't need any extra define flags like -DCONFIG_FB_DEFERRED_IO=1 because all defines are made in include/generated/autoconf.h which is included by all files (indirectly).
Now fb_info structure has the same size everywhere and the module loads without a segmentation fault.

The discussion might have continued from here.