From: Ben Gras <ben@minix3.org>
Date: Mon, 22 Jan 2007 15:15:30 +0000 (+0000)
Subject: Added register clobber warning to read_tsc.
X-Git-Tag: v3.1.3~107
X-Git-Url: http://zhaoyanbai.com/repos/%22https:/www.google.com/jsapi/static/howto.html?a=commitdiff_plain;h=d954a122f70727d5af104118862de0545e9c4892;p=minix.git

Added register clobber warning to read_tsc.
---

diff --git a/kernel/arch/i386/klib386.s b/kernel/arch/i386/klib386.s
index a8bbd1867..04aa8587e 100755
--- a/kernel/arch/i386/klib386.s
+++ b/kernel/arch/i386/klib386.s
@@ -552,6 +552,7 @@ _level0:
 !*===========================================================================*
 ! PUBLIC void read_tsc(unsigned long *high, unsigned long *low);
 ! Read the cycle counter of the CPU. Pentium and up. 
+! This function clobbers edx and eax.
 .align 16
 _read_tsc:
 .data1 0x0f		! this is the RDTSC instruction