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| author | Nicolas Pitre <nico@cam.org> | 2009-03-15 21:41:23 -0400 |
|---|---|---|
| committer | Nicolas Pitre <nico@cam.org> | 2009-03-15 21:41:23 -0400 |
| commit | d6f818f71fa5db79969aaecba302745199376169 (patch) | |
| tree | fcdedce488db0f80c7a816e0b52df83a01972838 /arch/x86/mm/iomap_32.c | |
| parent | ace14b82633960a2b6bf6a0b2640c63872a65562 (diff) | |
| parent | 305b07680f6c6a7e59f996c5bd85f009caff5bb1 (diff) | |
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Merge commit '305b07680f' into orion/master
Diffstat (limited to 'arch/x86/mm/iomap_32.c')
| -rw-r--r-- | arch/x86/mm/iomap_32.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index ca53224..04102d4 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -20,6 +20,17 @@ #include <asm/pat.h> #include <linux/module.h> +int is_io_mapping_possible(resource_size_t base, unsigned long size) +{ +#ifndef CONFIG_X86_PAE + /* There is no way to map greater than 1 << 32 address without PAE */ + if (base + size > 0x100000000ULL) + return 0; +#endif + return 1; +} +EXPORT_SYMBOL_GPL(is_io_mapping_possible); + /* Map 'pfn' using fixed map 'type' and protections 'prot' */ void * |