nbd: Use NULL to represent a pointer

This patch fixes the following sparse warnings:

drivers/block/nbd.c: note: in included file (through include/trace/trace_events.h, include/trace/define_trace.h, include/trace/events/nbd.h):
./include/trace/events/nbd.h:61:1: warning: Using plain integer as NULL pointer
drivers/block/nbd.c: note: in included file (through include/trace/perf.h, include/trace/define_trace.h, include/trace/events/nbd.h):
./include/trace/events/nbd.h:61:1: warning: Using plain integer as NULL pointer

Cc: Christoph Hellwig <hch@lst.de>
Cc: Josef Bacik <jbacik@fb.com>
Cc: Yu Kuai <yukuai3@huawei.com>
Cc: Markus Pargmann <mpa@pengutronix.de>
Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Link: https://lore.kernel.org/r/20240510202313.25209-2-bvanassche@acm.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/include/trace/events/nbd.h b/include/trace/events/nbd.h
index 9849956f34d85fbb264cf64e99131c4885d7b99c..390d98a05c9dd29c388840f5dd74be36dfc7f97c 100644 (file)
--- a/include/trace/events/nbd.h
+++ b/include/trace/events/nbd.h
@@ -72,7 +72,7 @@ DECLARE_EVENT_CLASS(nbd_send_request,
        ),
 
        TP_fast_assign(
-               __entry->nbd_request = 0;
+               __entry->nbd_request = NULL;
                __entry->dev_index = index;
                __entry->request = rq;
        ),