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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-02-04 22:29:16 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2008-02-05 09:44:18 -0800 |
| commit | 08e7d9b557299ba6ce57165ce8df310780bd681c (patch) | |
| tree | 8733b402eaa1de1a6bcdea5ee72ea8655c896dd4 | |
| parent | 5e5419734c8719cbc01af959ad9c0844002c0df5 (diff) | |
| download | linux-3.10-08e7d9b557299ba6ce57165ce8df310780bd681c.tar.gz linux-3.10-08e7d9b557299ba6ce57165ce8df310780bd681c.tar.bz2 linux-3.10-08e7d9b557299ba6ce57165ce8df310780bd681c.zip | |
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 <benh@kernel.crashing.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: <linux-arch@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/mmap.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 8295577a83b..bb4c963cc53 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); |