提交 9cb308ce 编写于 作者: X Xiaotian Feng 提交者: Tejun Heo

block: sysfs fix mismatched queue_var_{store,show} in 64bit kernel

In blk-sysfs.c, queue_var_store uses unsigned long to store data,
but queue_var_show uses unsigned int to show data.  This causes,

	# echo 70000000000 > /sys/block/<dev>/queue/read_ahead_kb
	# cat /sys/block/<dev>/queue/read_ahead_kb => get wrong value

Fix it by using unsigned long.

While at it, convert queue_rq_affinity_show() such that it uses bool
variable instead of explicit != 0 testing.
Signed-off-by: NXiaotian Feng <dfeng@redhat.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
上级 8f474287
......@@ -16,9 +16,9 @@ struct queue_sysfs_entry {
};
static ssize_t
queue_var_show(unsigned int var, char *page)
queue_var_show(unsigned long var, char *page)
{
return sprintf(page, "%d\n", var);
return sprintf(page, "%lu\n", var);
}
static ssize_t
......@@ -77,7 +77,8 @@ queue_requests_store(struct request_queue *q, const char *page, size_t count)
static ssize_t queue_ra_show(struct request_queue *q, char *page)
{
int ra_kb = q->backing_dev_info.ra_pages << (PAGE_CACHE_SHIFT - 10);
unsigned long ra_kb = q->backing_dev_info.ra_pages <<
(PAGE_CACHE_SHIFT - 10);
return queue_var_show(ra_kb, (page));
}
......@@ -189,9 +190,9 @@ static ssize_t queue_nomerges_store(struct request_queue *q, const char *page,
static ssize_t queue_rq_affinity_show(struct request_queue *q, char *page)
{
unsigned int set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags);
bool set = test_bit(QUEUE_FLAG_SAME_COMP, &q->queue_flags);
return queue_var_show(set != 0, page);
return queue_var_show(set, page);
}
static ssize_t
......
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