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authorDamien Le Moal <damien.lemoal@wdc.com>2021-08-11 06:37:01 +0300
committerJens Axboe <axboe@kernel.dk>2021-08-18 16:21:12 +0300
commit202bc942c5cd4340d37b06c4e0b8b03f9925d818 (patch)
treed035b4446726fef7015c835a569f83bf68d8beb3 /block/ioprio.c
parentba05200fcce0a73fa8db16c514fbaa476d1d9399 (diff)
downloadlinux-202bc942c5cd4340d37b06c4e0b8b03f9925d818.tar.xz
block: Introduce IOPRIO_NR_LEVELS
The BFQ scheduler and ioprio_check_cap() both assume that the RT priority class (IOPRIO_CLASS_RT) can have up to 8 different priority levels, similarly to the BE class (IOPRIO_CLASS_iBE). This is controlled using the IOPRIO_BE_NR macro , which is badly named as the number of levels also applies to the RT class. Introduce the class independent IOPRIO_NR_LEVELS macro, defined to 8, to make things clear. Keep the old IOPRIO_BE_NR macro definition as an alias for IOPRIO_NR_LEVELS. Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com> Link: https://lore.kernel.org/r/20210811033702.368488-6-damien.lemoal@wdc.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/ioprio.c')
-rw-r--r--block/ioprio.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/block/ioprio.c b/block/ioprio.c
index bee628f9f1b2..ca6b136c5586 100644
--- a/block/ioprio.c
+++ b/block/ioprio.c
@@ -74,9 +74,8 @@ int ioprio_check_cap(int ioprio)
fallthrough;
/* rt has prio field too */
case IOPRIO_CLASS_BE:
- if (data >= IOPRIO_BE_NR || data < 0)
+ if (data >= IOPRIO_NR_LEVELS || data < 0)
return -EINVAL;
-
break;
case IOPRIO_CLASS_IDLE:
break;