• Namhyung Kim's avatar
    pstore: Convert console write to use ->write_buf · 5c35dc00
    Namhyung Kim authored
    [ Upstream commit 70ad35db ]
    
    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: 's avatarNamhyung Kim <namhyung@kernel.org>
    Signed-off-by: 's avatarKees Cook <keescook@chromium.org>
    Signed-off-by: 's avatarSasha Levin <sashal@kernel.org>
    5c35dc00
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