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asm-generic, mm: pgtable: convert my_zero_pfn() to macros to fix build 

Commit 816422ad76 ("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>
This commit is contained in:
Kirill A. Shutemov 2012-12-26 03:19:55 +03:00 committed by Linus Torvalds
parent 7d1f9aeff1
commit 2f91ec8cc4
1 changed files with 2 additions and 4 deletions
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6
include/asm-generic/pgtable.h
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@ -461,10 +461,8 @@ static inline int is_zero_pfn(unsigned long pfn)
return offset_from_zero_pfn <= (zero_page_mask >> PAGE_SHIFT);
}
static inline unsigned long my_zero_pfn(unsigned long addr)
{
return page_to_pfn(ZERO_PAGE(addr));
}
#define my_zero_pfn(addr) page_to_pfn(ZERO_PAGE(addr))
#else
static inline int is_zero_pfn(unsigned long pfn)
{