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block, scheduler: convert xxx_var_store to void

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The last parameter "count" never be used in xxx_var_store,
convert these functions to void.

Signed-off-by: weiping zhang <zhangweiping@didichuxing.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
weiping zhang 2017-08-25 01:11:33 +08:00 committed by Jens Axboe
parent f5cb2d5152
commit 235f8da119
4 changed files with 31 additions and 33 deletions
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33
block/bfq-iosched.c
View file

@ -4801,16 +4801,13 @@ static ssize_t bfq_var_show(unsigned int var, char *page)
return sprintf(page, "%u\n", var);
}
static ssize_t bfq_var_store(unsigned long *var, const char *page,
size_t count)
static void bfq_var_store(unsigned long *var, const char *page)
{
unsigned long new_val;
int ret = kstrtoul(page, 10, &new_val);
if (ret == 0)
*var = new_val;
return count;
}
#define SHOW_FUNCTION(__FUNC, __VAR, __CONV) \
@ -4852,7 +4849,7 @@ __FUNC(struct elevator_queue *e, const char *page, size_t count) \
{ \
struct bfq_data *bfqd = e->elevator_data; \
unsigned long uninitialized_var(__data); \
int ret = bfq_var_store(&__data, (page), count); \
bfq_var_store(&__data, (page)); \
if (__data < (MIN)) \
__data = (MIN); \
else if (__data > (MAX)) \
@ -4863,7 +4860,7 @@ __FUNC(struct elevator_queue *e, const char *page, size_t count) \
*(__PTR) = (u64)__data * NSEC_PER_MSEC; \
else \
*(__PTR) = __data; \
return ret; \
return count; \
}
STORE_FUNCTION(bfq_fifo_expire_sync_store, &bfqd->bfq_fifo_expire[1], 1,
INT_MAX, 2);
@ -4880,13 +4877,13 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)\
{ \
struct bfq_data *bfqd = e->elevator_data; \
unsigned long uninitialized_var(__data); \
int ret = bfq_var_store(&__data, (page), count); \
bfq_var_store(&__data, (page)); \
if (__data < (MIN)) \
__data = (MIN); \
else if (__data > (MAX)) \
__data = (MAX); \
*(__PTR) = (u64)__data * NSEC_PER_USEC; \
return ret; \
return count; \
}
USEC_STORE_FUNCTION(bfq_slice_idle_us_store, &bfqd->bfq_slice_idle, 0,
UINT_MAX);
@ -4897,7 +4894,8 @@ static ssize_t bfq_max_budget_store(struct elevator_queue *e,
{
struct bfq_data *bfqd = e->elevator_data;
unsigned long uninitialized_var(__data);
int ret = bfq_var_store(&__data, (page), count);
bfq_var_store(&__data, (page));
if (__data == 0)
bfqd->bfq_max_budget = bfq_calc_max_budget(bfqd);
@ -4909,7 +4907,7 @@ static ssize_t bfq_max_budget_store(struct elevator_queue *e,
bfqd->bfq_user_max_budget = __data;
return ret;
return count;
}
/*
@ -4921,7 +4919,8 @@ static ssize_t bfq_timeout_sync_store(struct elevator_queue *e,
{
struct bfq_data *bfqd = e->elevator_data;
unsigned long uninitialized_var(__data);
int ret = bfq_var_store(&__data, (page), count);
bfq_var_store(&__data, (page));
if (__data < 1)
__data = 1;
@ -4932,7 +4931,7 @@ static ssize_t bfq_timeout_sync_store(struct elevator_queue *e,
if (bfqd->bfq_user_max_budget == 0)
bfqd->bfq_max_budget = bfq_calc_max_budget(bfqd);
return ret;
return count;
}
static ssize_t bfq_strict_guarantees_store(struct elevator_queue *e,
@ -4940,7 +4939,8 @@ static ssize_t bfq_strict_guarantees_store(struct elevator_queue *e,
{
struct bfq_data *bfqd = e->elevator_data;
unsigned long uninitialized_var(__data);
int ret = bfq_var_store(&__data, (page), count);
bfq_var_store(&__data, (page));
if (__data > 1)
__data = 1;
@ -4950,7 +4950,7 @@ static ssize_t bfq_strict_guarantees_store(struct elevator_queue *e,
bfqd->strict_guarantees = __data;
return ret;
return count;
}
static ssize_t bfq_low_latency_store(struct elevator_queue *e,
@ -4958,7 +4958,8 @@ static ssize_t bfq_low_latency_store(struct elevator_queue *e,
{
struct bfq_data *bfqd = e->elevator_data;
unsigned long uninitialized_var(__data);
int ret = bfq_var_store(&__data, (page), count);
bfq_var_store(&__data, (page));
if (__data > 1)
__data = 1;
@ -4966,7 +4967,7 @@ static ssize_t bfq_low_latency_store(struct elevator_queue *e,
bfq_end_wr(bfqd);
bfqd->low_latency = __data;
return ret;
return count;
}
#define BFQ_ATTR(name) \

13
block/cfq-iosched.c
View file

@ -4712,13 +4712,12 @@ cfq_var_show(unsigned int var, char *page)
return sprintf(page, "%u\n", var);
}
static ssize_t
cfq_var_store(unsigned int *var, const char *page, size_t count)
static void
cfq_var_store(unsigned int *var, const char *page)
{
char *p = (char *) page;
*var = simple_strtoul(p, &p, 10);
return count;
}
#define SHOW_FUNCTION(__FUNC, __VAR, __CONV) \
@ -4764,7 +4763,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
{ \
struct cfq_data *cfqd = e->elevator_data; \
unsigned int __data; \
int ret = cfq_var_store(&__data, (page), count); \
cfq_var_store(&__data, (page)); \
if (__data < (MIN)) \
__data = (MIN); \
else if (__data > (MAX)) \
@ -4773,7 +4772,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
*(__PTR) = (u64)__data * NSEC_PER_MSEC; \
else \
*(__PTR) = __data; \
return ret; \
return count; \
}
STORE_FUNCTION(cfq_quantum_store, &cfqd->cfq_quantum, 1, UINT_MAX, 0);
STORE_FUNCTION(cfq_fifo_expire_sync_store, &cfqd->cfq_fifo_expire[1], 1,
@ -4798,13 +4797,13 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
{ \
struct cfq_data *cfqd = e->elevator_data; \
unsigned int __data; \
int ret = cfq_var_store(&__data, (page), count); \
cfq_var_store(&__data, (page)); \
if (__data < (MIN)) \
__data = (MIN); \
else if (__data > (MAX)) \
__data = (MAX); \
*(__PTR) = (u64)__data * NSEC_PER_USEC; \
return ret; \
return count; \
}
USEC_STORE_FUNCTION(cfq_slice_idle_us_store, &cfqd->cfq_slice_idle, 0, UINT_MAX);
USEC_STORE_FUNCTION(cfq_group_idle_us_store, &cfqd->cfq_group_idle, 0, UINT_MAX);

9
block/deadline-iosched.c
View file

@ -373,13 +373,12 @@ deadline_var_show(int var, char *page)
return sprintf(page, "%d\n", var);
}
static ssize_t
deadline_var_store(int *var, const char *page, size_t count)
static void
deadline_var_store(int *var, const char *page)
{
char *p = (char *) page;
*var = simple_strtol(p, &p, 10);
return count;
}
#define SHOW_FUNCTION(__FUNC, __VAR, __CONV) \
@ -403,7 +402,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
{ \
struct deadline_data *dd = e->elevator_data; \
int __data; \
int ret = deadline_var_store(&__data, (page), count); \
deadline_var_store(&__data, (page)); \
if (__data < (MIN)) \
__data = (MIN); \
else if (__data > (MAX)) \
@ -412,7 +411,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
*(__PTR) = msecs_to_jiffies(__data); \
else \
*(__PTR) = __data; \
return ret; \
return count; \
}
STORE_FUNCTION(deadline_read_expire_store, &dd->fifo_expire[READ], 0, INT_MAX, 1);
STORE_FUNCTION(deadline_write_expire_store, &dd->fifo_expire[WRITE], 0, INT_MAX, 1);

9
block/mq-deadline.c
View file

@ -457,13 +457,12 @@ deadline_var_show(int var, char *page)
return sprintf(page, "%d\n", var);
}
static ssize_t
deadline_var_store(int *var, const char *page, size_t count)
static void
deadline_var_store(int *var, const char *page)
{
char *p = (char *) page;
*var = simple_strtol(p, &p, 10);
return count;
}
#define SHOW_FUNCTION(__FUNC, __VAR, __CONV) \
@ -487,7 +486,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
{ \
struct deadline_data *dd = e->elevator_data; \
int __data; \
int ret = deadline_var_store(&__data, (page), count); \
deadline_var_store(&__data, (page)); \
if (__data < (MIN)) \
__data = (MIN); \
else if (__data > (MAX)) \
@ -496,7 +495,7 @@ static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)
*(__PTR) = msecs_to_jiffies(__data); \
else \
*(__PTR) = __data; \
return ret; \
return count; \
}
STORE_FUNCTION(deadline_read_expire_store, &dd->fifo_expire[READ], 0, INT_MAX, 1);
STORE_FUNCTION(deadline_write_expire_store, &dd->fifo_expire[WRITE], 0, INT_MAX, 1);