[syslinux:lwip] idle_thread: safer interrupt handling
syslinux-bot for H. Peter Anvin
hpa at zytor.com
Fri Mar 30 14:54:05 PDT 2012
Commit-ID: 6b6d07cc4afdb8f1bf56f44f3fee6f02a590bb84
Gitweb: http://www.syslinux.org/commit/6b6d07cc4afdb8f1bf56f44f3fee6f02a590bb84
Author: H. Peter Anvin <hpa at zytor.com>
AuthorDate: Tue, 27 Mar 2012 23:02:38 -0700
Committer: H. Peter Anvin <hpa at zytor.com>
CommitDate: Tue, 27 Mar 2012 23:02:38 -0700
idle_thread: safer interrupt handling
Make sure we use "sti ; hlt" to make sure we don't go to sleep when we
suddenly have an interrupt coming in.
Signed-off-by: H. Peter Anvin <hpa at zytor.com>
---
core/thread/idle_thread.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/core/thread/idle_thread.c b/core/thread/idle_thread.c
index a3a5be2..4555333 100644
--- a/core/thread/idle_thread.c
+++ b/core/thread/idle_thread.c
@@ -5,11 +5,11 @@
static void idle_thread_func(void *dummy)
{
(void)dummy;
- sti();
for (;;) {
- thread_yield();
- asm volatile("hlt");
+ cli();
+ __schedule();
+ asm volatile("sti ; hlt" : : : "memory");
}
}
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