diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/include/asm/cio.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cio.h b/arch/s390/include/asm/cio.h index 096339207764..0c5d8ee657f0 100644 --- a/arch/s390/include/asm/cio.h +++ b/arch/s390/include/asm/cio.h @@ -5,6 +5,7 @@ #define _ASM_S390_CIO_H_ #include <linux/spinlock.h> +#include <linux/bitops.h> #include <asm/types.h> #define LPM_ANYPATH 0xff @@ -296,6 +297,15 @@ static inline int ccw_dev_id_is_equal(struct ccw_dev_id *dev_id1, return 0; } +/** + * pathmask_to_pos() - find the position of the left-most bit in a pathmask + * @mask: pathmask with at least one bit set + */ +static inline u8 pathmask_to_pos(u8 mask) +{ + return 8 - ffs(mask); +} + void channel_subsystem_reinit(void); extern void css_schedule_reprobe(void); |