[PATCH tip/core/rcu 07/15] uaccess: Cleanup PREEMPT_COUNT leftovers

paulmck
2020-09-28T23:31:50Z

From: Thomas Gleixner <tglx@linutronix.de>

CONFIG_PREEMPT_COUNT is now unconditionally enabled and will be
removed. Cleanup the leftovers before doing so.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
include/linux/uaccess.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index 94b2854..b79a5a9 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -230,9 +230,9 @@ static inline bool pagefault_disabled(void)
*
* This function should only be used by the fault handlers. Other users should
* stick to pagefault_disabled().
- * Please NEVER use preempt_disable() to disable the fault handler. With
- * !CONFIG_PREEMPT_COUNT, this is like a NOP. So the handler won't be disabled.
- * in_atomic() will report different values based on !CONFIG_PREEMPT_COUNT.
+ *
+ * Please NEVER use preempt_disable() or local_irq_disable() to disable the
+ * fault handler.
*/
#define faulthandler_disabled() (pagefault_disabled() || in_atomic())

--
2.9.5