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| author | Xiaotian Feng <dfeng@redhat.com> | 2009-07-17 15:26:26 +0800 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2009-07-17 16:54:15 +0900 |
| commit | 9cb308ce8d32a1fb3600acab6034e19a90228743 (patch) | |
| tree | 774c9b00be1b417cc805895b4da83dd59ea144c9 /block/blk-sysfs.c | |
| parent | 8f47428704c2fd6f787a6f340071b9c338b65803 (diff) | |
| download | lwn-9cb308ce8d32a1fb3600acab6034e19a90228743.tar.gz lwn-9cb308ce8d32a1fb3600acab6034e19a90228743.zip | |
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: Xiaotian Feng <dfeng@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index b1cd04087d6a..418d63619680 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -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 |