From: Bart Van Assche <bart.vanassche@wdc.com>
Date: Wed, 30 Aug 2017 11:42:10 -0700
Subject: [PATCH] bfq: Suppress compiler warnings about comparisons
Git-commit: 1530486cda2df87d66af8bd3aa069c12b6fada41
Patch-mainline: v4.14-rc1
References: bsc#1104967,FATE#325924
This patch avoids that the following warnings are reported when
building with W=1:
block/bfq-iosched.c: In function 'bfq_back_seek_max_store':
block/bfq-iosched.c:4860:13: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
if (__data < (MIN)) \
^
block/bfq-iosched.c:4876:1: note: in expansion of macro 'STORE_FUNCTION'
STORE_FUNCTION(bfq_back_seek_max_store, &bfqd->bfq_back_max, 0, INT_MAX, 0);
^~~~~~~~~~~~~~
block/bfq-iosched.c: In function 'bfq_slice_idle_store':
block/bfq-iosched.c:4860:13: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
if (__data < (MIN)) \
^
block/bfq-iosched.c:4879:1: note: in expansion of macro 'STORE_FUNCTION'
STORE_FUNCTION(bfq_slice_idle_store, &bfqd->bfq_slice_idle, 0, INT_MAX, 2);
^~~~~~~~~~~~~~
block/bfq-iosched.c: In function 'bfq_slice_idle_us_store':
block/bfq-iosched.c:4892:13: warning: comparison of unsigned expression < 0 is always false [-Wtype-limits]
if (__data < (MIN)) \
^
block/bfq-iosched.c:4899:1: note: in expansion of macro 'USEC_STORE_FUNCTION'
USEC_STORE_FUNCTION(bfq_slice_idle_us_store, &bfqd->bfq_slice_idle, 0,
^~~~~~~~~~~~~~~~~~~
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Hannes Reinecke <hare@suse.com>
---
block/bfq-iosched.c | 20 ++++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index 0f286cd5da95..7adde1b84e19 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -4851,16 +4851,16 @@ static ssize_t \
__FUNC(struct elevator_queue *e, const char *page, size_t count) \
{ \
struct bfq_data *bfqd = e->elevator_data; \
- unsigned long __data; \
+ unsigned long __data, __min = (MIN), __max = (MAX); \
int ret; \
\
ret = bfq_var_store(&__data, (page)); \
if (ret) \
return ret; \
- if (__data < (MIN)) \
- __data = (MIN); \
- else if (__data > (MAX)) \
- __data = (MAX); \
+ if (__data < __min) \
+ __data = __min; \
+ else if (__data > __max) \
+ __data = __max; \
if (__CONV == 1) \
*(__PTR) = msecs_to_jiffies(__data); \
else if (__CONV == 2) \
@@ -4883,16 +4883,16 @@ STORE_FUNCTION(bfq_slice_idle_store, &bfqd->bfq_slice_idle, 0, INT_MAX, 2);
static ssize_t __FUNC(struct elevator_queue *e, const char *page, size_t count)\
{ \
struct bfq_data *bfqd = e->elevator_data; \
- unsigned long __data; \
+ unsigned long __data, __min = (MIN), __max = (MAX); \
int ret; \
\
ret = bfq_var_store(&__data, (page)); \
if (ret) \
return ret; \
- if (__data < (MIN)) \
- __data = (MIN); \
- else if (__data > (MAX)) \
- __data = (MAX); \
+ if (__data < __min) \
+ __data = __min; \
+ else if (__data > __max) \
+ __data = __max; \
*(__PTR) = (u64)__data * NSEC_PER_USEC; \
return count; \
}
--
2.16.4