Differential D28768 Diff 84183 sys/contrib/openzfs/module/os/freebsd/zfs/abd_os.c

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	* with vanilla abd_alloc().			* with vanilla abd_alloc().
	*/			*/
	abd_t *			abd_t *
	abd_alloc_for_io(size_t size, boolean_t is_metadata)			abd_alloc_for_io(size_t size, boolean_t is_metadata)
	{			{
	return (abd_alloc_linear(size, is_metadata));			return (abd_alloc_linear(size, is_metadata));
	}			}

	/*
	* This is just a helper function to abd_get_offset_scatter() to alloc a
	* scatter ABD using the calculated chunkcnt based on the offset within the
	* parent ABD.
	*/
	static abd_t *
	abd_alloc_scatter_offset_chunkcnt(size_t chunkcnt)
	{
	size_t abd_size = offsetof(abd_t,
	abd_u.abd_scatter.abd_chunks[chunkcnt]);
	abd_t *abd = kmem_alloc(abd_size, KM_PUSHPAGE);
	ASSERT3P(abd, !=, NULL);
	list_link_init(&abd->abd_gang_link);
	mutex_init(&abd->abd_mtx, NULL, MUTEX_DEFAULT, NULL);
	ABDSTAT_INCR(abdstat_struct_size, abd_size);

	return (abd);
	}

	abd_t *			abd_t *
	abd_get_offset_scatter(abd_t abd, abd_t sabd, size_t off)			abd_get_offset_scatter(abd_t abd, abd_t sabd, size_t off)
	{			{
	abd_verify(sabd);			abd_verify(sabd);
	ASSERT3U(off, <=, sabd->abd_size);			ASSERT3U(off, <=, sabd->abd_size);

	size_t new_offset = ABD_SCATTER(sabd).abd_offset + off;			size_t new_offset = ABD_SCATTER(sabd).abd_offset + off;
	uint_t chunkcnt = abd_scatter_chunkcnt(sabd) -			uint_t chunkcnt = abd_scatter_chunkcnt(sabd) -
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