pstore: Convert console write to use ->write_buf
authorNamhyung Kim <namhyung@kernel.org>
Wed, 19 Oct 2016 01:23:41 +0000 (10:23 +0900)
committerKees Cook <keescook@chromium.org>
Wed, 16 Nov 2016 00:34:32 +0000 (16:34 -0800)
commit70ad35db3321a6d129245979de4ac9d06eed897c
tree935660eba5136072d0f8c014fd2ce70aefaa7889
parente9e360b08a44098ec6f31de8e5a29a3ffaada828
pstore: Convert console write to use ->write_buf

Maybe I'm missing something, but I don't know why it needs to copy the
input buffer to psinfo->buf and then write.  Instead we can write the
input buffer directly.  The only implementation that supports console
message (i.e. ramoops) already does it for ftrace messages.

For the upcoming virtio backend driver, it needs to protect psinfo->buf
overwritten from console messages.  If it could use ->write_buf method
instead of ->write, the problem will be solved easily.

Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
fs/pstore/platform.c