[src/trunk]: src/sys/arch/mips/include Define a UPAGES_MAX constant to size t...

[simonb <simonb%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/2ace3c547d02
branches:  trunk
changeset: 943084:2ace3c547d02
user:      simonb <simonb%NetBSD.org@localhost>
date:      Wed Aug 26 10:51:45 2020 +0000

description:
Define a UPAGES_MAX constant to size the a md_upte array in MIPS's
struct mdlwp.  This is exposed to userland, so we can't use something
based on PAGE_SIZE.

diffstat:

 sys/arch/mips/include/mips_param.h |  3 ++-
 sys/arch/mips/include/proc.h       |  4 ++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diffs (35 lines):

diff -r aacfbc646d7b -r 2ace3c547d02 sys/arch/mips/include/mips_param.h
--- a/sys/arch/mips/include/mips_param.h        Wed Aug 26 10:34:03 2020 +0000
+++ b/sys/arch/mips/include/mips_param.h        Wed Aug 26 10:51:45 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mips_param.h,v 1.46 2020/08/23 10:23:38 simonb Exp $   */
+/*     $NetBSD: mips_param.h,v 1.47 2020/08/26 10:51:45 simonb Exp $   */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -130,6 +130,7 @@
 #define        USPACE          MAX(__MIN_USPACE, PAGE_SIZE)
 #define        UPAGES          (USPACE / PAGE_SIZE) /* number of pages for u-area */
 #define        USPACE_ALIGN    USPACE          /* make sure it starts on a even VA */
+#define        UPAGES_MAX      8               /* a (constant) max for userland use */
 
 /*
  * Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
diff -r aacfbc646d7b -r 2ace3c547d02 sys/arch/mips/include/proc.h
--- a/sys/arch/mips/include/proc.h      Wed Aug 26 10:34:03 2020 +0000
+++ b/sys/arch/mips/include/proc.h      Wed Aug 26 10:51:45 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: proc.h,v 1.30 2020/08/23 10:23:38 simonb Exp $ */
+/*     $NetBSD: proc.h,v 1.31 2020/08/26 10:51:45 simonb Exp $ */
 
 /*
  * Copyright (c) 1992, 1993
@@ -52,7 +52,7 @@
        vaddr_t md_ss_addr;             /* single step address for ptrace */
        int     md_ss_instr;            /* single step instruction for ptrace */
        volatile int md_astpending;     /* AST pending on return to userland */
-       int     md_upte[UPAGES];        /* ptes for mapping u page */
+       int     md_upte[UPAGES_MAX];    /* ptes for mapping u page */
 };
 
 struct mdproc {