asm-generic, mm: pgtable: convert my_zero_pfn() to macros to fix build
authorKirill A. Shutemov <kirill@shutemov.name>
Wed, 26 Dec 2012 00:19:55 +0000 (03:19 +0300)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 18 Jan 2013 19:23:26 +0000 (11:23 -0800)
commit2f91ec8cc456d6e57db3ebced34a9e96a356168f
tree4471784343e5fc2827050f8dc754518ae722129d
parent7d1f9aeff1ee4a20b1aeb377dd0f579fe9647619
asm-generic, mm: pgtable: convert my_zero_pfn() to macros to fix build

Commit 816422ad7647 ("asm-generic, mm: pgtable: consolidate zero page
helpers") broke the compile on MIPS if SPARSEMEM is enabled.  We get
this:

  In file included from arch/mips/include/asm/pgtable.h:552,
                   from include/linux/mm.h:44,
                   from arch/mips/kernel/asm-offsets.c:14:
  include/asm-generic/pgtable.h: In function 'my_zero_pfn':
  include/asm-generic/pgtable.h:466: error: implicit declaration of function 'page_to_section'
  In file included from arch/mips/kernel/asm-offsets.c:14:
  include/linux/mm.h: At top level:
  include/linux/mm.h:738: error: conflicting types for 'page_to_section'
  include/asm-generic/pgtable.h:466: note: previous implicit declaration of 'page_to_section' was here

Due header files inter-dependencies, the only way I see to fix it is
convert my_zero_pfn() for __HAVE_COLOR_ZERO_PAGE to macros.

Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Tested-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
include/asm-generic/pgtable.h