From: Ben Gras <ben@minix3.org>
Date: Fri, 12 Jan 2007 16:33:41 +0000 (+0000)
Subject: Use bitwise not instead of logical not on PIE flag when disabling periodic
X-Git-Tag: v3.1.3~117
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=f65b3b8fbf47e2afee9dcbc1821333c27e9504aa;p=minix.git

Use bitwise not instead of logical not on PIE flag when disabling periodic
interrupts to avoid clobbering register B. This seems to have fixed the
corrupting-CMOS bug when enabling profiling.
---

diff --git a/kernel/arch/i386/system.c b/kernel/arch/i386/system.c
index 72d28b8b7..2f96901d8 100644
--- a/kernel/arch/i386/system.c
+++ b/kernel/arch/i386/system.c
@@ -89,7 +89,7 @@ PUBLIC void arch_stop_profile_clock(void)
   outb(RTC_INDEX, RTC_REG_B);
   r = inb(RTC_IO);
   outb(RTC_INDEX, RTC_REG_B);  
-  outb(RTC_IO, r & !RTC_B_PIE);
+  outb(RTC_IO, r & ~RTC_B_PIE);
 }
 
 PUBLIC void arch_ack_profile_clock(void)