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    Subject[PATCH 4.4 028/149] ARM: percpu.h: fix build error
    Date
    From: Grygorii Strashko <grygorii.strashko@ti.com>

    commit aa54ea903abb02303bf55855fb51e3fcee135d70 upstream.

    Fix build error for the case:
    defined(CONFIG_SMP) && !defined(CONFIG_CPU_V6)

    config: keystone_defconfig

    CC arch/arm/kernel/signal.o
    In file included from ../include/linux/random.h:14,
    from ../arch/arm/kernel/signal.c:8:
    ../arch/arm/include/asm/percpu.h: In function ‘__my_cpu_offset’:
    ../arch/arm/include/asm/percpu.h:29:34: error: ‘current_stack_pointer’ undeclared (first use in this function); did you mean ‘user_stack_pointer’?
    : "Q" (*(const unsigned long *)current_stack_pointer));
    ^~~~~~~~~~~~~~~~~~~~~
    user_stack_pointer

    Fixes: f227e3ec3b5c ("random32: update the net random state on interrupt and activity")
    Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
    Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/arm/include/asm/percpu.h | 2 ++
    1 file changed, 2 insertions(+)

    --- a/arch/arm/include/asm/percpu.h
    +++ b/arch/arm/include/asm/percpu.h
    @@ -16,6 +16,8 @@
    #ifndef _ASM_ARM_PERCPU_H_
    #define _ASM_ARM_PERCPU_H_

    +#include <asm/thread_info.h>
    +
    /*
    * Same as asm-generic/percpu.h, except that we store the per cpu offset
    * in the TPIDRPRW. TPIDRPRW only exists on V6K and V7

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