Commit:     08e7d9b557299ba6ce57165ce8df310780bd681c
Parent:     5e5419734c8719cbc01af959ad9c0844002c0df5
Author:     Martin Schwidefsky <[EMAIL PROTECTED]>
AuthorDate: Mon Feb 4 22:29:16 2008 -0800
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Tue Feb 5 09:44:18 2008 -0800

    arch_rebalance_pgtables call
    In order to change the layout of the page tables after an mmap has crossed 
    adress space limit of the current page table layout a architecture hook in
    get_unmapped_area is needed.  The arguments are the address of the new 
    and the length of it.
    Cc: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
    Signed-off-by: Martin Schwidefsky <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
 mm/mmap.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/mm/mmap.c b/mm/mmap.c
index 8295577..bb4c963 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -36,6 +36,10 @@
 #define arch_mmap_check(addr, len, flags)      (0)
+#ifndef arch_rebalance_pgtables
+#define arch_rebalance_pgtables(addr, len)             (addr)
 static void unmap_region(struct mm_struct *mm,
                struct vm_area_struct *vma, struct vm_area_struct *prev,
                unsigned long start, unsigned long end);
@@ -1424,7 +1428,7 @@ get_unmapped_area(struct file *file, unsigned long addr, 
unsigned long len,
        if (addr & ~PAGE_MASK)
                return -EINVAL;
-       return addr;
+       return arch_rebalance_pgtables(addr, len);
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