lkml.org 
[lkml]   [2020]   [Oct]   [9]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip: core/rcu] uaccess: Cleanup PREEMPT_COUNT leftovers
The following commit has been merged into the core/rcu branch of tip:

Commit-ID: 53eed709fcb488787aca3f94796d82775c8e9669
Gitweb: https://git.kernel.org/tip/53eed709fcb488787aca3f94796d82775c8e9669
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Mon, 14 Sep 2020 19:29:06 +02:00
Committer: Paul E. McKenney <paulmck@kernel.org>
CommitterDate: Mon, 28 Sep 2020 16:03:20 -07:00

uaccess: Cleanup PREEMPT_COUNT leftovers

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())

\
 
 \ /
  Last update: 2020-10-09 19:03    [W:0.028 / U:0.184 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site