block: don't try Write Same from __blkdev_issue_zeroout

Write Same can return an error asynchronously if it turns out the
underlying SCSI device does not support Write Same, which makes a
proper fallback to other methods in __blkdev_issue_zeroout impossible.
Thus only issue a Write Same from blkdev_issue_zeroout an don't try it
at all from __blkdev_issue_zeroout as a non-invasive workaround.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout")
Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

path: root/timer.c

#include <unistd.h>
#include <sys/time.h>

#include "timer.h"

void set_itimer_interval_value(struct itimerval *itimer, unsigned long sec,
			       unsigned long usec)
{
	itimer->it_interval.tv_sec = sec;
	itimer->it_interval.tv_usec = usec;

	itimer->it_value.tv_sec = sec;
	itimer->it_value.tv_usec = usec;
}

int get_user_hz(void)
{
	return sysconf(_SC_CLK_TCK);
}