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[SPARC64]: Fix 2 bugs in huge page support.

Browse source 
1) huge_pte_offset() did not check the page table hierarchy
   elements as being empty correctly, resulting in an OOPS

2) Need platform specific hugetlb_get_unmapped_area() to handle
   the top-down vs. bottom-up address space allocation strategies.

Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
David S. Miller 2006-03-20 01:17:17 -08:00
commit f6b83f070e
2 changed files with 176 additions and 4 deletions
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1
include/asm-sparc64/page.h
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@ -104,6 +104,7 @@ typedef unsigned long pgprot_t;
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
#define ARCH_HAS_SETCLEAR_HUGE_PTE
#define ARCH_HAS_HUGETLB_PREFAULT_HOOK
#define HAVE_ARCH_HUGETLB_UNMAPPED_AREA
#endif
#define TASK_UNMAPPED_BASE (test_thread_flag(TIF_32BIT) ? \