• Dave Hansen's avatar
    mm: Make arch_unmap()/bprm_mm_init() available to all architectures · 62e88b1c
    Dave Hansen authored
    The x86 MPX patch set calls arch_unmap() and arch_bprm_mm_init()
    from fs/exec.c, so we need at least a stub for them in all
    architectures.  They are only called under an #ifdef for
    CONFIG_MMU=y, so we can at least restict this to architectures
    with MMU support.
    
    blackfin/c6x have no MMU support, so do not call arch_unmap().
    They also do not include mm_hooks.h or mmu_context.h at all and
    do not need to be touched.
    
    s390, um and unicore32 do not use asm-generic/mm_hooks.h, so got
    their own arch_unmap() versions.  (I also moved um's
    arch_dup_mmap() to be closer to the other mm_hooks.h functions).
    
    xtensa only includes mm_hooks when MMU=y, which should be fine
    since arch_unmap() is called only from MMU=y code.
    
    For the rest, we use the stub copies of these functions in
    asm-generic/mm_hook.h.
    
    I cross compiled defconfigs for cris (to check NOMMU) and s390
    to make sure that this works.  I also checked a 64-bit build
    of UML and all my normal x86 builds including PARAVIRT on and
    off.
    Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
    Cc: Dave Hansen <dave@sr71.net>
    Cc: linux-arch@vger.kernel.org
    Cc: x86@kernel.org
    Link: http://lkml.kernel.org/r/20141118182350.8B4AA2C2@viggo.jf.intel.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    62e88b1c
mmu_context.h 1.66 KB