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Update the comments above vmapbuf() and vunmapbuf() to reflect reality.

This commit is contained in:
thorpej 1999-05-16 22:24:16 +00:00
parent 20be6a2a2a
commit 7e68ddd393
1 changed files with 4 additions and 20 deletions
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24
sys/arch/alpha/alpha/vm_machdep.c
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@ -1,4 +1,4 @@
/* $NetBSD: vm_machdep.c,v 1.46 1999/05/13 21:58:32 thorpej Exp $ */
/* $NetBSD: vm_machdep.c,v 1.47 1999/05/16 22:24:16 thorpej Exp $ */
/*
* Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
@ -29,7 +29,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.46 1999/05/13 21:58:32 thorpej Exp $");
__KERNEL_RCSID(0, "$NetBSD: vm_machdep.c,v 1.47 1999/05/16 22:24:16 thorpej Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -370,22 +370,7 @@ pagemove(from, to, size)
extern vm_map_t phys_map;
/*
* Map an IO request into kernel virtual address space. Requests fall into
* one of five catagories:
*
* B_PHYS|B_UAREA: User u-area swap.
* Address is relative to start of u-area (p_addr).
* B_PHYS|B_PAGET: User page table swap.
* Address is a kernel VA in usrpt (Usrptmap).
* B_PHYS|B_DIRTY: Dirty page push.
* Address is a VA in proc2's address space.
* B_PHYS|B_PGIN: Kernel pagein of user pages.
* Address is VA in user's address space.
* B_PHYS: User "raw" IO request.
* Address is VA in user's address space.
*
* All requests are (re)mapped into kernel VA space via the useriomap
* (a name with only slightly more meaning than "kernelmap")
* Map a user I/O request into kernel virtual address space.
*/
void
vmapbuf(bp, len)
@ -417,8 +402,7 @@ vmapbuf(bp, len)
}
/*
* Free the io map PTEs associated with this IO operation.
* We also invalidate the TLB entries and restore the original b_addr.
* Unmap a previously-mapped user I/O request.
*/
void
vunmapbuf(bp, len)