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block: change ioprio_valid() to an inline function

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Change the ioprio_valid() macro in include/usapi/linux/ioprio.h to an
inline function declared on the kernel side in include/linux/ioprio.h.
Also improve checks on the class value by checking the upper bound
value.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Link: https://lore.kernel.org/r/20210811033702.368488-4-damien.lemoal@wdc.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal 2021-08-11 12:36:59 +09:00 committed by Jens Axboe
parent 25bca50e52
commit a553a835ca
2 changed files with 10 additions and 2 deletions
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10
include/linux/ioprio.h
View file

@ -8,6 +8,16 @@
#include <uapi/linux/ioprio.h>
/*
* Check that a priority value has a valid class.
*/
static inline bool ioprio_valid(unsigned short ioprio)
{
unsigned short class = IOPRIO_PRIO_CLASS(ioprio);
return class > IOPRIO_CLASS_NONE && class <= IOPRIO_CLASS_IDLE;
}
/*
* if process has set io priority explicitly, use that. if not, convert
* the cpu scheduler nice value to an io priority

2
include/uapi/linux/ioprio.h
View file

@ -27,8 +27,6 @@ enum {
IOPRIO_CLASS_IDLE,
};
#define ioprio_valid(mask) (IOPRIO_PRIO_CLASS((mask)) != IOPRIO_CLASS_NONE)
/*
* 8 best effort priority levels are supported
*/