split mmap

This is a straightforward split of do_mmap_pgoff() into two functions:

 - do_mmap_pgoff() checks the parameters, and calculates the vma
   flags.  Then it calls

 - mmap_region(), which does the actual mapping

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index bbd427e8741a..d4ab4e590e23 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1071,6 +1071,10 @@ extern unsigned long get_unmapped_area(struct file *, unsigned long, unsigned lo
 extern unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
         unsigned long len, unsigned long prot,
         unsigned long flag, unsigned long pgoff);
+extern unsigned long mmap_region(struct file *file, unsigned long addr,
+        unsigned long len, unsigned long flags,
+        unsigned int vm_flags, unsigned long pgoff,
+        int accountable);
 
 static inline unsigned long do_mmap(struct file *file, unsigned long addr,
         unsigned long len, unsigned long prot,