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Add a short comment clarifying the purpose of swapdev and swapdev_vp.

This commit is contained in:
thorpej 1997-06-15 23:42:12 +00:00
parent e9faa92a39
commit 36330c8c5e
1 changed files with 6 additions and 1 deletions
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7
sys/sys/systm.h
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@ -1,4 +1,4 @@
/* $NetBSD: systm.h,v 1.68 1997/06/14 04:19:48 thorpej Exp $ */
/* $NetBSD: systm.h,v 1.69 1997/06/15 23:42:12 thorpej Exp $ */
/*-
* Copyright (c) 1982, 1988, 1991, 1993
@ -107,6 +107,11 @@ extern struct vnode *rootvp; /* vnode equivalent to above */
extern struct device *root_device; /* device equivalent to above */
extern const char *rootspec; /* how root device was specified */
/*
* These represent the swap pseudo-device (`sw'). This device
* is used by the swap pager to indirect through the routines
* in sys/vm/vm_swap.c.
*/
extern dev_t swapdev; /* swapping device */
extern struct vnode *swapdev_vp;/* vnode equivalent to above */