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authorBob Liu <lliubbo@gmail.com>2012-07-11 14:02:35 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-11 16:04:47 -0700
commitfea9f718b3d68147f162ed2d870183ce5e0ad8d8 (patch)
treef255c59e2c4d8712c3034898c82585b3133d4b51 /net/phonet
parentb59f6d1febd6cbe9fae4589bf72da0ed32bc69e0 (diff)
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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>
Diffstat (limited to 'net/phonet')
0 files changed, 0 insertions, 0 deletions
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