[src/trunk]: src/sys/arch/sparc64/sparc64 sun4v: hv_mach_desc() needs a buffe...

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

details:   https://anonhg.NetBSD.org/src/rev/c38a64135c98
branches:  trunk
changeset: 805656:c38a64135c98
user:      palle <palle%NetBSD.org@localhost>
date:      Sun Jan 11 13:40:22 2015 +0000

description:
sun4v: hv_mach_desc() needs a buffer length of zero to return the actual length - this also fixes the failing sparc GENERIC_SUN4U build

diffstat:

 sys/arch/sparc64/sparc64/mdesc.c |  6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diffs (20 lines):

diff -r 950a198e66d5 -r c38a64135c98 sys/arch/sparc64/sparc64/mdesc.c
--- a/sys/arch/sparc64/sparc64/mdesc.c  Sun Jan 11 10:00:53 2015 +0000
+++ b/sys/arch/sparc64/sparc64/mdesc.c  Sun Jan 11 13:40:22 2015 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: mdesc.c,v 1.1 2015/01/10 22:19:26 palle Exp $  */
+/*     $NetBSD: mdesc.c,v 1.2 2015/01/11 13:40:22 palle Exp $  */
 /*     $OpenBSD: mdesc.c,v 1.7 2014/11/30 22:26:15 kettenis Exp $      */
 /*
  * Copyright (c) 2009 Mark Kettenis
@@ -42,7 +42,9 @@
        vaddr_t va;
        int err;
 
-       hv_mach_desc((paddr_t)NULL, &len);
+       pa = 0;
+       len = 0;  /* trick to determine actual buffer size */
+       hv_mach_desc(pa, &len);
        KASSERT(len != 0);
 
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