Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=08e7d9b557299ba6ce57165ce8df310780bd681c
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
the
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
mapping
and the length of it.
Cc: Benjamin Herrenschmidt <[EMAIL PROTECTED]>
Signed-off-by: Martin Schwidefsky <[EMAIL PROTECTED]>
Cc: <[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)
#endif
+#ifndef arch_rebalance_pgtables
+#define arch_rebalance_pgtables(addr, len) (addr)
+#endif
+
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);
}
EXPORT_SYMBOL(get_unmapped_area);
-
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