From: weiping zhang <zhangweiping@didichuxing.com>
Date: Fri, 25 Aug 2017 01:11:33 +0800
Subject: [PATCH] block, scheduler: convert xxx_var_store to void
Git-commit: 235f8da119351ae583abfbbf577eb61a8b564203
Patch-mainline: v4.14-rc1
References: bsc#1104967,FATE#325924
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>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/bfq-iosched.c | 33 +++++++++++++++++----------------
block/cfq-iosched.c | 13 ++++++-------
block/deadline-iosched.c | 9 ++++-----
block/mq-deadline.c | 9 ++++-----
4 files changed, 31 insertions(+), 33 deletions(-)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index ea2832b6698c..79484469c2f7 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -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) \
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 15cad965b138..9b86e9b352e9 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -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);
diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c
index c68f6bbc0dcd..b83f77460d28 100644
--- a/block/deadline-iosched.c
+++ b/block/deadline-iosched.c
@@ -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);
diff --git a/block/mq-deadline.c b/block/mq-deadline.c
index 1b964a387afe..c8dfddc4ba8b 100644
--- a/block/mq-deadline.c
+++ b/block/mq-deadline.c
@@ -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);
--
2.16.4