From: Yu Kuai <yukuai3@xxxxxxxxxx>
'wb_normal' will set to 0 if 'min_lat_nsec' is 0, and 'min_lat_nsec' can
only be set to 0 through sysfs configuration where 'WBT_STATE_OFF_MANUAL'
is set together, in the meantime, they can only be cleared together
through sysfs afterwards. Hence 'wb_normal != 0' is the same as
'rwb->enable_state != WBT_STATE_OFF_MANUAL'.
The code is redundan, hence replace the checking of 'wb_normal' to
'enable_state' in rwb_enabled() and reuse rwb_enabled() for
wbt_disabled().
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-wbt.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index cb464c572840..06d400fa050d 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -146,7 +146,7 @@ enum {
static inline bool rwb_enabled(struct rq_wb *rwb)
{
return rwb && rwb->enable_state != WBT_STATE_OFF_DEFAULT &&
- rwb->wb_normal != 0;
+ rwb->enable_state != WBT_STATE_OFF_MANUAL;
}
static void wb_timestamp(struct rq_wb *rwb, unsigned long *var)
@@ -494,8 +494,7 @@ bool wbt_disabled(struct request_queue *q)
{
struct rq_qos *rqos = wbt_rq_qos(q);
- return !rqos || RQWB(rqos)->enable_state == WBT_STATE_OFF_DEFAULT ||
- RQWB(rqos)->enable_state == WBT_STATE_OFF_MANUAL;
+ return !rqos || !rwb_enabled(RQWB(rqos));
}
u64 wbt_get_min_lat(struct request_queue *q)
--
2.39.2
