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-rw-r--r--include/linux/preempt.h22
-rw-r--r--include/linux/uaccess.h5
2 files changed, 24 insertions, 3 deletions
diff --git a/include/linux/preempt.h b/include/linux/preempt.h
index a3d9dc8c2c00..dd9ddf8af205 100644
--- a/include/linux/preempt.h
+++ b/include/linux/preempt.h
@@ -64,7 +64,11 @@ do { \
} while (0)
#else
-#define preempt_enable() preempt_enable_no_resched()
+#define preempt_enable() \
+do { \
+ barrier(); \
+ preempt_count_dec(); \
+} while (0)
#define preempt_check_resched() do { } while (0)
#endif
@@ -93,7 +97,11 @@ do { \
__preempt_schedule_context(); \
} while (0)
#else
-#define preempt_enable_notrace() preempt_enable_no_resched_notrace()
+#define preempt_enable_notrace() \
+do { \
+ barrier(); \
+ __preempt_count_dec(); \
+} while (0)
#endif
#else /* !CONFIG_PREEMPT_COUNT */
@@ -116,6 +124,16 @@ do { \
#endif /* CONFIG_PREEMPT_COUNT */
+#ifdef MODULE
+/*
+ * Modules have no business playing preemption tricks.
+ */
+#undef sched_preempt_enable_no_resched
+#undef preempt_enable_no_resched
+#undef preempt_enable_no_resched_notrace
+#undef preempt_check_resched
+#endif
+
#ifdef CONFIG_PREEMPT_NOTIFIERS
struct preempt_notifier;
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 9d8cf056e661..ecd3319dac33 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -25,13 +25,16 @@ static inline void pagefault_disable(void)
static inline void pagefault_enable(void)
{
+#ifndef CONFIG_PREEMPT
/*
* make sure to issue those last loads/stores before enabling
* the pagefault handler again.
*/
barrier();
preempt_count_dec();
- preempt_check_resched();
+#else
+ preempt_enable();
+#endif
}
#ifndef ARCH_HAS_NOCACHE_UACCESS