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get_unmapped_area handles MAP_FIXED on ia64
Handle MAP_FIXED in ia64 arch_get_unmapped_area and hugetlb_get_unmapped_area(), just call prepare_hugepage_range in the later and is_hugepage_only_range() in the former. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: William Irwin <bill.irwin@oracle.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -33,6 +33,13 @@ arch_get_unmapped_area (struct file *filp, unsigned long addr, unsigned long len
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if (len > RGN_MAP_LIMIT)
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return -ENOMEM;
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/* handle fixed mapping: prevent overlap with huge pages */
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if (flags & MAP_FIXED) {
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if (is_hugepage_only_range(mm, addr, len))
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return -EINVAL;
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return addr;
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}
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#ifdef CONFIG_HUGETLB_PAGE
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if (REGION_NUMBER(addr) == RGN_HPAGE)
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addr = 0;
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@ -148,6 +148,14 @@ unsigned long hugetlb_get_unmapped_area(struct file *file, unsigned long addr, u
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return -ENOMEM;
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if (len & ~HPAGE_MASK)
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return -EINVAL;
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/* Handle MAP_FIXED */
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if (flags & MAP_FIXED) {
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if (prepare_hugepage_range(addr, len, pgoff))
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return -EINVAL;
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return addr;
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}
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/* This code assumes that RGN_HPAGE != 0. */
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if ((REGION_NUMBER(addr) != RGN_HPAGE) || (addr & (HPAGE_SIZE - 1)))
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addr = HPAGE_REGION_BASE;
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