Hi Mike,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.18-rc2 next-20180627]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Mike-Rapoport/alpha-switch-to-NO_BOOTMEM/20180627-194800
config: alpha-allyesconfig (attached as .config)
compiler: alpha-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=alpha 

All error/warnings (new ones prefixed by >>):

   mm/page_alloc.c: In function 'update_defer_init':
>> mm/page_alloc.c:321:14: error: 'PAGES_PER_SECTION' undeclared (first use in this function); did you mean 'USEC_PER_SEC'?
         (pfn & (PAGES_PER_SECTION - 1)) == 0) {
                 ^~~~~~~~~~~~~~~~~
                 USEC_PER_SEC
   mm/page_alloc.c:321:14: note: each undeclared identifier is reported only once for each function it appears in
   In file included from include/linux/cache.h:5:0,
                    from include/linux/printk.h:9,
                    from include/linux/kernel.h:14,
                    from include/asm-generic/bug.h:18,
                    from arch/alpha/include/asm/bug.h:23,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/mm.h:9,
                    from mm/page_alloc.c:18:
   mm/page_alloc.c: In function 'deferred_grow_zone':
   mm/page_alloc.c:1624:52: error: 'PAGES_PER_SECTION' undeclared (first use in this function); did you mean 'USEC_PER_SEC'?
     unsigned long nr_pages_needed = ALIGN(1 << order, PAGES_PER_SECTION);
                                                       ^
   include/uapi/linux/kernel.h:11:47: note: in definition of macro '__ALIGN_KERNEL_MASK'
    #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
                                                  ^~~~
>> include/linux/kernel.h:58:22: note: in expansion of macro '__ALIGN_KERNEL'
    #define ALIGN(x, a)  __ALIGN_KERNEL((x), (a))
                         ^~~~~~~~~~~~~~
>> mm/page_alloc.c:1624:34: note: in expansion of macro 'ALIGN'
     unsigned long nr_pages_needed = ALIGN(1 << order, PAGES_PER_SECTION);
                                     ^~~~~
   In file included from include/asm-generic/bug.h:18:0,
                    from arch/alpha/include/asm/bug.h:23,
                    from include/linux/bug.h:5,
                    from include/linux/mmdebug.h:5,
                    from include/linux/mm.h:9,
                    from mm/page_alloc.c:18:
   mm/page_alloc.c: In function 'free_area_init_node':
   mm/page_alloc.c:6379:50: error: 'PAGES_PER_SECTION' undeclared (first use in this function); did you mean 'USEC_PER_SEC'?
     pgdat->static_init_pgcnt = min_t(unsigned long, PAGES_PER_SECTION,
                                                     ^
   include/linux/kernel.h:812:22: note: in definition of macro '__typecheck'
      (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                         ^
   include/linux/kernel.h:836:24: note: in expansion of macro '__safe_cmp'
     __builtin_choose_expr(__safe_cmp(x, y), \
                           ^~~~~~~~~~
   include/linux/kernel.h:904:27: note: in expansion of macro '__careful_cmp'
    #define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <)
                              ^~~~~~~~~~~~~
>> mm/page_alloc.c:6379:29: note: in expansion of macro 'min_t'
     pgdat->static_init_pgcnt = min_t(unsigned long, PAGES_PER_SECTION,
                                ^~~~~
   include/linux/kernel.h:836:2: error: first argument to '__builtin_choose_expr' not a constant
     __builtin_choose_expr(__safe_cmp(x, y), \
     ^
   include/linux/kernel.h:904:27: note: in expansion of macro '__careful_cmp'
    #define min_t(type, x, y) __careful_cmp((type)(x), (type)(y), <)
                              ^~~~~~~~~~~~~
>> mm/page_alloc.c:6379:29: note: in expansion of macro 'min_t'
     pgdat->static_init_pgcnt = min_t(unsigned long, PAGES_PER_SECTION,
                                ^~~~~

vim +/__ALIGN_KERNEL +58 include/linux/kernel.h

44696908 David S. Miller     2012-05-23  56  
3ca45a46 zijun_hu            2016-10-14  57  /* @a is a power of 2 value */
a79ff731 Alexey Dobriyan     2010-04-13 @58  #define ALIGN(x, a)		__ALIGN_KERNEL((x), (a))
ed067d4a Krzysztof Kozlowski 2017-04-11  59  #define ALIGN_DOWN(x, a)	__ALIGN_KERNEL((x) - ((a) - 1), (a))
9f93ff5b Alexey Dobriyan     2010-04-13  60  #define __ALIGN_MASK(x, mask)	__ALIGN_KERNEL_MASK((x), (mask))
a83308e6 Matthew Wilcox      2007-09-11  61  #define PTR_ALIGN(p, a)		((typeof(p))ALIGN((unsigned long)(p), (a)))
f10db627 Herbert Xu          2008-02-06  62  #define IS_ALIGNED(x, a)		(((x) & ((typeof(x))(a) - 1)) == 0)
2ea58144 Linus Torvalds      2006-11-26  63  

:::::: The code at line 58 was first introduced by commit
:::::: a79ff731a1b277d0e92d9453bdf374e04cec717a netfilter: xtables: make XT_ALIGN() usable in exported headers by exporting __ALIGN_KERNEL()

:::::: TO: Alexey Dobriyan <adobriyan@gmail.com>
:::::: CC: Patrick McHardy <kaber@trash.net>

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