pstore/blk: Provide way to query pstore configuration
In order to configure itself, the MTD backend needs to be able to query the current pstore configuration. Introduce pstore_blk_get_config() for this purpose. Signed-off-by: NWeiXiong Liao <liaoweixiong@allwinnertech.com> Link: https://lore.kernel.org/lkml/20200511233229.27745-9-keescook@chromium.org/Co-developed-by: NKees Cook <keescook@chromium.org> Signed-off-by: NKees Cook <keescook@chromium.org>
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