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    SubjectRe: [PATCH 0/7] blktrace: various cleanups and fixes

    * Li Zefan <lizf@cn.fujitsu.com> wrote:

    > While trying to use blktrace in -tip tree, I encounted kernel NULL
    > dereference, so I looked into the code, and then found some other
    > bugs.
    >
    > This patchset is part 1, and I have some other pending fixes.
    >
    > Each patch is small and straightforward, and should be easy to review:
    >
    > [PATCH 1/7] blktrace: fix possible memory leak
    > [PATCH 2/7] blktrace: make blk_tracer_enabled a bool flag
    > [PATCH 3/7] blktrace: remove blk_probe_mutex
    > [PATCH 4/7] blktrace: don't increase blk_probes_ref if failed to setup blk trace
    > [PATCH 5/7] blktrace: report EBUSY correctly
    > [PATCH 6/7] blktrace: remove sysfs_blk_trace_enable_show/store()
    > [PATCH 7/7] blktrace: avoid accessing NULL bdev->bd_disk
    > ---
    > blktrace.c | 154 +++++++++++++++++--------------------------------------------
    > 1 file changed, 45 insertions(+), 109 deletions(-)
    >
    > Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>

    Nice fixes. Applied to tip:tracing/blktrace, thanks!

    Ingo


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