D42810.id130695.diff
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D42810.id130695.diff
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	diff --git a/sys/compat/linuxkpi/common/include/linux/seqlock.h b/sys/compat/linuxkpi/common/include/linux/seqlock.h
	--- a/sys/compat/linuxkpi/common/include/linux/seqlock.h
	+++ b/sys/compat/linuxkpi/common/include/linux/seqlock.h
	@@ -36,6 +36,8 @@
	#include <sys/rwlock.h>
	#include <sys/seqc.h>

	+#include <linux/compiler.h>
	+
	struct lock_class_key;

	struct seqcount {
	@@ -84,6 +86,13 @@
	struct seqcount_mutex: seqc_write_end \
	)(&(s)->seqc)

	+static inline void
	+write_seqcount_invalidate(struct seqcount_mutex *seqcount)
	+{
	+ atomic_thread_fence_rel();
	+ seqcount->seqc += 2;
	+}
	+
	#define read_seqcount_begin(s) seqc_read(&(s)->seqc)
	#define raw_read_seqcount(s) seqc_read_any(&(s)->seqc)

	@@ -165,4 +174,10 @@
	#define read_seqretry(seqlock, gen) \
	read_seqcount_retry(&(seqlock)->seql_count, gen)

	+static inline unsigned
	+seqprop_sequence(const seqcount_mutex_t *seqcount)
	+{
	+ return READ_ONCE(seqcount->seqc);
	+}
	+
	#endif /* _LINUXKPI_LINUX_SEQLOCK_H__ */