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-rw-r--r--mm/nommu.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/mm/nommu.c b/mm/nommu.c
index 8687973462bb..6f9248f89bde 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.