diff options
| author | Ralf Baechle <ralf@linux-mips.org> | 2009-07-03 07:11:15 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2009-07-03 15:45:29 +0100 |
| commit | baf922780251d12bc1c24c83df60c4c278abb745 (patch) | |
| tree | d18b24f58763d7b13dd37e4d9c70b2b99e845b18 | |
| parent | 01a6221a6a51ec47b9ae3ed42c396f98dd488c7e (diff) | |
MIPS: Fix CONFIG_FLATMEM version of pfn_valid()
For systems which do not define PHYS_OFFSET as 0 pfn_valid() may falsely
have returned 0 on most configurations. Bug introduced by commit
752fbeb2e3555c0d236e992f1195fd7ce30e728d (linux-mips.org) rsp.
6f284a2ce7b8bc49cb8455b1763357897a899abb (kernel.org) titled "[MIPS]
FLATMEM: introduce PHYS_OFFSET."
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/include/asm/page.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h index dc0eaa731281..96a14a426a7c 100644 --- a/arch/mips/include/asm/page.h +++ b/arch/mips/include/asm/page.h @@ -165,7 +165,14 @@ typedef struct { unsigned long pgprot; } pgprot_t; #ifdef CONFIG_FLATMEM -#define pfn_valid(pfn) ((pfn) >= ARCH_PFN_OFFSET && (pfn) < max_mapnr) +#define pfn_valid(pfn) \ +({ \ + unsigned long __pfn = (pfn); \ + /* avoid <linux/bootmem.h> include hell */ \ + extern unsigned long min_low_pfn; \ + \ + __pfn >= min_low_pfn && __pfn < max_mapnr; \ +}) #elif defined(CONFIG_SPARSEMEM) |