The O_SYNC speedup patches missed the generic_file_xxx_nolock cases, which
means that pages weren't actually getting sync'ed in those cases.  This
patch fixes that. 
Signed-off-by: Suparna Bhattacharya <suparna@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>