From 9f727e23941089b7b2667a6f7fb45ab76b0f4982 Mon Sep 17 00:00:00 2001
From: gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4>
Date: Sat, 8 Nov 2014 17:41:11 +0000
Subject: Fixed bug bug #547.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7491 35acf78f-673a-0410-8e92-d51de3d6d3f4
---
 os/rt/src/chevents.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'os/rt/src/chevents.c')

diff --git a/os/rt/src/chevents.c b/os/rt/src/chevents.c
index 4385257b3..2db6fdd9b 100644
--- a/os/rt/src/chevents.c
+++ b/os/rt/src/chevents.c
@@ -384,7 +384,7 @@ eventmask_t chEvtWaitOne(eventmask_t events) {
     chSchGoSleepS(CH_STATE_WTOREVT);
     m = ctp->p_epending & events;
   }
-  m &= -m;
+  m ^= m & (m - 1);
   ctp->p_epending &= ~m;
 
   chSysUnlock();
@@ -488,7 +488,7 @@ eventmask_t chEvtWaitOneTimeout(eventmask_t events, systime_t time) {
     }
     m = ctp->p_epending & events;
   }
-  m &= -m;
+  m ^= m & (m - 1);
   ctp->p_epending &= ~m;
 
   chSysUnlock();
-- 
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