Hello Jens Axboe,
The patch d45a0f150e9d: "block: make
/sys/block/<dev>/queue/discard_max_bytes writeable" from Jul 16,
2015, leads to the following static checker warning:
block/blk-sysfs.c:152 queue_discard_max_hw_show()
warn: should 'q->limits.max_hw_discard_sectors << 9' be a 64 bit type?
block/blk-sysfs.c
148 static ssize_t queue_discard_max_hw_show(struct request_queue *q, char *page)
149 {
150 unsigned long long val;
151
152 val = q->limits.max_hw_discard_sectors << 9;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
It definitely looks like this can wrap.
153 return sprintf(page, "%llu\n", val);
154 }
regards,
dan carpenter
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