• Kirill A. Shutemov's avatar
    mm, asm-generic: define PUD_SHIFT in <asm-generic/4level-fixup.h> · 4155b8e0
    Kirill A. Shutemov authored
    If an architecure uses <asm-generic/4level-fixup.h>, build fails if we
    try to use PUD_SHIFT in generic code:
    
       In file included from arch/microblaze/include/asm/bug.h:1:0,
                        from include/linux/bug.h:4,
                        from include/linux/thread_info.h:11,
                        from include/asm-generic/preempt.h:4,
                        from arch/microblaze/include/generated/asm/preempt.h:1,
                        from include/linux/preempt.h:18,
                        from include/linux/spinlock.h:50,
                        from include/linux/mmzone.h:7,
                        from include/linux/gfp.h:5,
                        from include/linux/slab.h:14,
                        from mm/mmap.c:12:
       mm/mmap.c: In function 'exit_mmap':
    >> mm/mmap.c:2858:46: error: 'PUD_SHIFT' undeclared (first use in this function)
           round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);
                                                     ^
       include/asm-generic/bug.h:86:25: note: in definition of macro 'WARN_ON'
         int __ret_warn_on = !!(condition);    \
                                ^
       mm/mmap.c:2858:46: note: each undeclared identifier is reported only once for each function it appears in
           round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);
                                                     ^
       include/asm-generic/bug.h:86:25: note: in definition of macro 'WARN_ON'
         int __ret_warn_on = !!(condition);    \
                                ^
    As with <asm-generic/pgtable-nopud.h>, let's define PUD_SHIFT to
    PGDIR_SHIFT.
    Signed-off-by: 's avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
    Reported-by: 's avatarWu Fengguang <fengguang.wu@intel.com>
    Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
    4155b8e0
4level-fixup.h 1.04 KB