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| author | David Howells <dhowells@redhat.com> | 2007-03-22 00:11:23 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-03-22 19:39:05 -0700 |
| commit | d56e03cd275486eb8141116a7af2df7457cb0115 (patch) | |
| tree | adc85d1c9b342a9dd68451780cd555c8fc483dbc /mm/nommu.c | |
| parent | 8da38d7bac802ed2a09a79aaae9961c806a1847c (diff) | |
| download | linux-3.10-d56e03cd275486eb8141116a7af2df7457cb0115.tar.gz linux-3.10-d56e03cd275486eb8141116a7af2df7457cb0115.tar.bz2 linux-3.10-d56e03cd275486eb8141116a7af2df7457cb0115.zip | |
[PATCH] NOMMU: supply get_unmapped_area() to fix NOMMU SYSV SHM
Supply a get_unmapped_area() to fix NOMMU SYSV SHM support.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Adam Litke <agl@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
| -rw-r--r-- | mm/nommu.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/mm/nommu.c b/mm/nommu.c index 23fb033e596..ba6df4d2997 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1193,6 +1193,28 @@ void unmap_mapping_range(struct address_space *mapping, EXPORT_SYMBOL(unmap_mapping_range); /* + * ask for an unmapped area at which to create a mapping on a file + */ +unsigned long get_unmapped_area(struct file *file, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + unsigned long (*get_area)(struct file *, unsigned long, unsigned long, + unsigned long, unsigned long); + + get_area = current->mm->get_unmapped_area; + if (file && file->f_op && file->f_op->get_unmapped_area) + get_area = file->f_op->get_unmapped_area; + + if (!get_area) + return -ENOSYS; + + return get_area(file, addr, len, pgoff, flags); +} + +EXPORT_SYMBOL(get_unmapped_area); + +/* * Check that a process has enough memory to allocate a new virtual * mapping. 0 means there is enough memory for the allocation to * succeed and -ENOMEM implies there is not. |