Bob Liu 0fa627b15c fs: ramfs: file-nommu: add SetPageUptodate() ... commit fea9f718b3 upstream. There is a bug in the below scenario for !CONFIG_MMU: 1. create a new file 2. mmap the file and write to it 3. read the file can't get the correct value Because sys_read() -> generic_file_aio_read() -> simple_readpage() -> clear_page() which causes the page to be zeroed. Add SetPageUptodate() to ramfs_nommu_expand_for_mapping() so that generic_file_aio_read() do not call simple_readpage(). Signed-off-by: Bob Liu <lliubbo@gmail.com> Cc: Hugh Dickins <hughd@google.com> Cc: David Howells <dhowells@redhat.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2012-07-16 09:04:45 -07:00
..
file-mmu.c
file-nommu.c	fs: ramfs: file-nommu: add SetPageUptodate()	2012-07-16 09:04:45 -07:00
inode.c	tidy up after d_make_root() conversion	2012-03-20 21:29:37 -04:00
internal.h
Makefile