Hi Song, the md bitmap file support is very problematic in how it bypasses the file system for file access. I looked into fixing it in preparation for making buffer_head optionals but had to give up because it is so convoluted. This series includes the cleanups I've started which seem useful even for the internal bitmap support, then makes the bitmap file support conditional and adds a deprecation warning. Diffstat: Kconfig | 10 + md-bitmap.c | 339 ++++++++++++++++++++++++++++++------------------------------ md-bitmap.h | 1 md.c | 9 + 4 files changed, 191 insertions(+), 168 deletions(-)
