Did you run

make oldconfig or menuconfig

Did you copy the ".config" from the emulator?

Are you building for the emulator or for *real* hw platform?

Jeff

On Jul 8, 7:21 am, "[EMAIL PROTECTED]"
<[EMAIL PROTECTED]> wrote:
> hi
> i am usng the linux-2.6.23-android-m3-rc20 kernel and  tool chain
> arm-2008q1-126-arm-none-linux-gnueabi.bin
>
> while building the kernel i have found this error .............>
>
> CC [M]  drivers/char/drm/drm_lock.o
> drivers/char/drm/drm_lock.c: In function 'drm_lock_take':
> drivers/char/drm/drm_lock.c:221: error: implicit declaration of
> function 'cmpxchg'
> make[3]: *** [drivers/char/drm/drm_lock.o] Error 1
> make[2]: *** [drivers/char/drm] Error 2
> make[1]: *** [drivers/char] Error 2
> make: *** [drivers] Error 2
>
> why this error come ,how to solve this
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