voron

experimental ARM OS
git clone git://git.2f30.org/voron.git
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commit 8e791c295ff1004c6ddd6f0535418fe0f8363199
parent 44c6403f317da166dfc0621e7e6a42bb16a2178d
Author: oblique <psyberbits@gmail.com>
Date:   Tue Nov 13 07:08:41 +0200

fix a race-condition in semaphore_wait()

Diffstat:
include/semaphore.h | 3+++
1 file changed, 3 insertions(+), 0 deletions(-)
diff --git a/include/semaphore.h b/include/semaphore.h @@ -1,6 +1,7 @@ #ifndef __SEMAPHORE_H #define __SEMAPHORE_H +#include <irq.h> #include <io.h> #include <spinlock.h> #include <sched.h> @@ -45,8 +46,10 @@ semaphore_wait(semaphore_t *sem) while (1) { spinlock_lock(&sem->lock); if (sem->counter == 0) { + sched_disable(); suspend_task_no_schedule((u32)sem); spinlock_unlock(&sem->lock); + sched_enable(); schedule(); continue; }