diff options
Diffstat (limited to 'sys/compat/linuxkpi/common/include/linux/seqlock.h')
| -rw-r--r-- | sys/compat/linuxkpi/common/include/linux/seqlock.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sys/compat/linuxkpi/common/include/linux/seqlock.h b/sys/compat/linuxkpi/common/include/linux/seqlock.h index a7b9dd12e493..554fdfd6e202 100644 --- a/sys/compat/linuxkpi/common/include/linux/seqlock.h +++ b/sys/compat/linuxkpi/common/include/linux/seqlock.h @@ -31,6 +31,7 @@ #include <sys/param.h> #include <sys/systm.h> +#include <sys/cdefs.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/rwlock.h> @@ -84,9 +85,24 @@ seqcount_mutex_init(struct seqcount_mutex *seqcount, void *mutex __unused) struct seqcount_mutex: seqc_write_end \ )(&(s)->seqc) +static inline void +lkpi_write_seqcount_invalidate(seqc_t *seqcp) +{ + atomic_thread_fence_rel(); + *seqcp += SEQC_MOD * 2; +} +#define write_seqcount_invalidate(s) lkpi_write_seqcount_invalidate(&(s)->seqc) + #define read_seqcount_begin(s) seqc_read(&(s)->seqc) #define raw_read_seqcount(s) seqc_read_any(&(s)->seqc) +static inline seqc_t +lkpi_seqprop_sequence(const seqc_t *seqcp) +{ + return (atomic_load_int(seqcp)); +} +#define seqprop_sequence(s) lkpi_seqprop_sequence(&(s)->seqc) + /* * XXX: Are predicts from inline functions still not honored by clang? */ |