> $ make pxa3xx_defconfig; make
> CC init/do_mounts_rd.o
> In file included from include/linux/list_bl.h:5,
> from include/linux/rculist_bl.h:7,
> from include/linux/dcache.h:7,
> from include/linux/fs.h:381,
> from init/do_mounts_rd.c:3:
> include/linux/bit_spinlock.h: In function 'bit_spin_unlock':
> include/linux/bit_spinlock.h:61: error: implicit declaration of function 'arch_is_coherent'
> make[1]: *** [init/do_mounts_rd.o] Error 1
> make: *** [init] Error 2
>
> Signed-off-by: Axel Lin <axel.lin@gmail.com>
> Acked-by: Peter Huewe <peterhuewe@gmx.de>
> ---
> It was posted on
https://lkml.org/lkml/2010/12/17/9 .
> I still have the build error for today's linux-next tree.
> CC Eric Miao, maybe he will take this patch.
>
> Axel
>
> arch/arm/include/asm/system.h | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/arch/arm/include/asm/system.h b/arch/arm/include/asm/system.h
> index ec4327a..3222ab8 100644
> --- a/arch/arm/include/asm/system.h
> +++ b/arch/arm/include/asm/system.h
> @@ -155,6 +155,7 @@ extern unsigned int user_debug;
> #define rmb() dmb()
> #define wmb() mb()
> #else
> +#include <asm/memory.h>
> #define mb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
> #define rmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
> #define wmb() do { if (arch_is_coherent()) dmb(); else barrier(); } while (0)
