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    Subject[PATCH 11/23] arm64:uapi: set __BITS_PER_LONG correctly for ILP32 and LP64
    Date
    From: Andrew Pinski <apinski@cavium.com>

    Define __BITS_PER_LONG depending on the ABI used (i.e. check whether
    __ILP32__ or __LP64__ is defined). This is necessary for glibc to
    determine the appropriate type definitions for the system call interface.

    Signed-off-by: Andrew Pinski <apinski@cavium.com>
    Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
    Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
    Signed-off-by: Yury Norov <ynorov@caviumnetworks.com>
    Reviewed-by: David Daney <ddaney@caviumnetworks.com>
    ---
    arch/arm64/include/uapi/asm/bitsperlong.h | 9 ++++++++-
    1 file changed, 8 insertions(+), 1 deletion(-)

    diff --git a/arch/arm64/include/uapi/asm/bitsperlong.h b/arch/arm64/include/uapi/asm/bitsperlong.h
    index fce9c29..4265243 100644
    --- a/arch/arm64/include/uapi/asm/bitsperlong.h
    +++ b/arch/arm64/include/uapi/asm/bitsperlong.h
    @@ -16,7 +16,14 @@
    #ifndef __ASM_BITSPERLONG_H
    #define __ASM_BITSPERLONG_H

    -#define __BITS_PER_LONG 64
    +#if defined(__LP64__)
    +/* Assuming __LP64__ will be defined for native ELF64's and not for ILP32. */
    +# define __BITS_PER_LONG 64
    +#elif defined(__ILP32__)
    +# define __BITS_PER_LONG 32
    +#else
    +# error "Neither LP64 nor ILP32: unsupported ABI in asm/bitsperlong.h"
    +#endif

    #include <asm-generic/bitsperlong.h>

    --
    2.5.0
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