diff options
Diffstat (limited to 'include/linux/ioprio.h')
| -rw-r--r-- | include/linux/ioprio.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/include/linux/ioprio.h b/include/linux/ioprio.h index ef9ad4fb245f..3f53bc27a19b 100644 --- a/include/linux/ioprio.h +++ b/include/linux/ioprio.h @@ -9,6 +9,21 @@ #include <uapi/linux/ioprio.h> /* + * Default IO priority. + */ +#define IOPRIO_DEFAULT IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, IOPRIO_BE_NORM) + +/* + * 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 */ @@ -41,7 +56,7 @@ static inline int get_current_ioprio(void) if (ioc) return ioc->ioprio; - return IOPRIO_PRIO_VALUE(IOPRIO_CLASS_NONE, 0); + return IOPRIO_DEFAULT; } /* |