3.9.y 'make modules' build failure in 8192cu.ko

[srcshelton]

Immediately after 'make bcmrpi_defconfig':

  Building modules, stage 2.
  MODPOST 1164 modules - due to target is PHONY
ERROR: "kernel_thread" [drivers/net/wireless/rtl8192cu/8192cu.ko] undefined!
make[4]: *** [__modpost] Error 1
make[3]: *** [modules] Error 2
make[2]: *** [sub-make] Error 2
make[1]: *** [modules] Error 2
make: *** [sub-make] Error 2

Interestingly, the osdep_service.c code generating this error reads:

#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0))
        *t_hdl = kernel_thread(threadfn, data, CLONE_FS|CLONE_FILES);
        if(*t_hdl < 0)
#else   
        *t_hdl = kthread_run(threadfn, data, name);
        if(IS_ERR(*t_hdl))
#endif

... so is the 3.9.y branch incorrectly defined to still be version 3.6, or something similar?

[popcornmix]

Can you try
rm include/linux/version.h

[srcshelton]

version.h contains:

#define LINUX_VERSION_CODE 198155
#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))

This has been built with make O=<alternative build dir>, which may have a bearing, but I've removed version.h from the build directory (and confirmed that it doesn't exist in the clone of the git repo). Rebuilding now...

[popcornmix]

198155 = 0x3060b = linux 3.6.11

I'm guessing you've switched branches in git. linux kernel doesn't detect that file needs rebuilding - you need to delete it when switching branches.

[srcshelton]

Interesting - I have a clone of the main repo which follows the 3.6.y branch, but also fetches 3.8.y and 3.9.y. I've then cloned each of these branches into local repos, and then built with O= to output to final build directories. I'm pretty sure I've done a make mrproper on the 3.9.y build directory, but I may be thinking of one of the others...

Thanks for the help!