Mastering Linux Kernel Development

API

Linux provides many APIs for using sequence locks, which are defined in </linux/seqlock.h>. Some of the important ones are listed here:

static inline void write_seqlock(seqlock_t *sl)
{
        spin_lock(&sl->lock);
        write_seqcount_begin(&sl->seqcount);
}

static inline void write_sequnlock(seqlock_t *sl)
{
        write_seqcount_end(&sl->seqcount);
        spin_unlock(&sl->lock);
}

static inline void write_seqlock_bh(seqlock_t *sl)
{
        spin_lock_bh(&sl->lock);
        write_seqcount_begin(&sl->seqcount);
}

static inline void write_sequnlock_bh(seqlock_t *sl)
{
        write_seqcount_end(&sl->seqcount);
        spin_unlock_bh(&sl->lock);
}

static inline void write_seqlock_irq(seqlock_t *sl)
{
        spin_lock_irq(&sl->lock);
        write_seqcount_begin(&sl->seqcount);
}

static inline void write_sequnlock_irq ...