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authorHugh Dickins <hugh.dickins@tiscali.co.uk>2009-12-30 20:17:34 +0000
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-30 12:23:27 -0800
commit66f0dc481e5b802ab363b979fc1753410c7d82b5 (patch)
tree9f8609685f07d410bc6536a0d3e47e366edf93d4 /mm/nommu.c
parent75c85a0bc13367aabb36e8208d4e373b022b43b3 (diff)
mm: move sys_mmap_pgoff from util.c
Move sys_mmap_pgoff() from mm/util.c to mm/mmap.c and mm/nommu.c, where we'd expect to find such code: especially now that it contains the MAP_HUGETLB handling. Revert mm/util.c to how it was in 2.6.32. This patch just ignores MAP_HUGETLB in the nommu case, as in 2.6.32, whereas 2.6.33-rc2 reported -ENOSYS. Perhaps validate_mmap_request() should reject it with -EINVAL? Add that later if necessary. Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/nommu.c')
-rw-r--r--mm/nommu.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index 8687973462b..6f9248f89bd 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -1398,6 +1398,31 @@ error_getting_region:
}
EXPORT_SYMBOL(do_mmap_pgoff);
+SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags,
+ unsigned long, fd, unsigned long, pgoff)
+{
+ struct file *file = NULL;
+ unsigned long retval = -EBADF;
+
+ if (!(flags & MAP_ANONYMOUS)) {
+ file = fget(fd);
+ if (!file)
+ goto out;
+ }
+
+ flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
+
+ down_write(&current->mm->mmap_sem);
+ retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
+ up_write(&current->mm->mmap_sem);
+
+ if (file)
+ fput(file);
+out:
+ return retval;
+}
+
/*
* split a vma into two pieces at address 'addr', a new vma is allocated either
* for the first part or the tail.