Re: port-alpha/48488: pmap.h modify cause Kernel Panic on NetBSD/alpha current version.

[Matt Thomas <matt%3am-software.com@localhost>]

The following reply was made to PR port-alpha/48488; it has been noted by GNATS.

From: Matt Thomas <matt%3am-software.com@localhost>
To: Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>
Cc: gnats-bugs%NetBSD.org@localhost,
 nullnilaki%gmail.com@localhost
Subject: Re: port-alpha/48488: pmap.h modify cause Kernel Panic on NetBSD/alpha 
current version.
Date: Wed, 1 Jan 2014 09:02:25 -0800

 On Jan 1, 2014, at 8:59 AM, Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost> 
wrote:
 
 > What about this reference?
 > http://nxr.netbsd.org/xref/src/sys/arch/alpha/alpha/pmap.c?r=1.258#220
 >    220 static struct pmap    kernel_pmap_store
 >    221       [(PMAP_SIZEOF(ALPHA_MAXPROCS) + sizeof(struct pmap) - 1)
 >    222               / sizeof(struct pmap)];
 
 That should be fine.  Since struct pmap is smaller than 
 PMAP_SIZEOF(ALPHA_MAXPROCS) you need more than one pmap struct to store
 that.  I thought of changing that to 
 roundup(PMAP_SIZEOF(ALPHA_MAXPROCS), sizeof(struct pmap)).