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	.It Fa cred			.It Fa cred
	The user credentials of the calling process.			The user credentials of the calling process.
	.El			.El
	.Pp			.Pp
	Attributes which are not being modified by			Attributes which are not being modified by
	.Fn VOP_SETATTR			.Fn VOP_SETATTR
	should be set to the value			should be set to the value
	.Dv VNOVAL ;			.Dv VNOVAL ;
	.Fn VATTR_NULL			.Dv VATTR_NULL
	may be used to clear all the values, and should generally be used to reset			may be used to clear all the values, and should generally be used to reset
	the contents of			the contents of
	.Fa *vap			.Fa *vap
	prior to setting specific values.			prior to setting specific values.
	.Sh LOCKS			.Sh LOCKS
	.Fn VOP_GETATTR			.Fn VOP_GETATTR
	expects the vnode to be locked on entry and will leave the vnode locked on			expects the vnode to be locked on entry and will leave the vnode locked on
	return.			return.
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