Bob Liu fea9f718b3 fs: ramfs: file-nommu: add SetPageUptodate() ... 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> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2012-07-11 16:04:47 -07:00
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file-mmu.c	fs: convert simple fs to new truncate	2010-05-27 22:15:47 -04:00
file-nommu.c	fs: ramfs: file-nommu: add SetPageUptodate()	2012-07-11 16:04:47 -07:00
inode.c	tidy up after d_make_root() conversion	2012-03-20 21:29:37 -04:00
internal.h	fs/ramfs/ extern cleanup	2008-04-29 08:06:00 -07:00
Makefile	Remove valueless definition of hard-selected RAMFS option	2007-10-17 08:42:56 -07:00