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    Subject[PATCH 4.9 034/175] dm table: Remove BUG_ON(in_interrupt())
    Date
    From: Thomas Gleixner <tglx@linutronix.de>

    [ Upstream commit e7b624183d921b49ef0a96329f21647d38865ee9 ]

    The BUG_ON(in_interrupt()) in dm_table_event() is a historic leftover from
    a rework of the dm table code which changed the calling context.

    Issuing a BUG for a wrong calling context is frowned upon and
    in_interrupt() is deprecated and only covering parts of the wrong
    contexts. The sanity check for the context is covered by
    CONFIG_DEBUG_ATOMIC_SLEEP and other debug facilities already.

    Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
    Signed-off-by: Mike Snitzer <snitzer@redhat.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/md/dm-table.c | 6 ------
    1 file changed, 6 deletions(-)

    diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c
    index 2d3ff028f50c9..62e3dc19b6099 100644
    --- a/drivers/md/dm-table.c
    +++ b/drivers/md/dm-table.c
    @@ -1250,12 +1250,6 @@ void dm_table_event_callback(struct dm_table *t,

    void dm_table_event(struct dm_table *t)
    {
    - /*
    - * You can no longer call dm_table_event() from interrupt
    - * context, use a bottom half instead.
    - */
    - BUG_ON(in_interrupt());
    -
    mutex_lock(&_event_lock);
    if (t->event_fn)
    t->event_fn(t->event_context);
    --
    2.27.0


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