linux-kernel - [RFC PATCH 03/30] softirq: Implement local_softirq_pending() below softirq vector definition

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Date:   Thu, 11 Oct 2018 01:11:50 +0200
From:   Frederic Weisbecker <frederic@...nel.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Frederic Weisbecker <frederic@...nel.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "David S . Miller" <davem@...emloft.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Ingo Molnar <mingo@...nel.org>,
        Frederic Weisbecker <fweisbec@...il.com>,
        Mauro Carvalho Chehab <mchehab@...pensource.com>
Subject: [RFC PATCH 03/30] softirq: Implement local_softirq_pending() below softirq vector definition

The future extensions of this API are going to depend on the vector
definitions. So order the code accordingly.

Signed-off-by: Frederic Weisbecker <frederic@...nel.org>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: David S. Miller <davem@...emloft.net>
Cc: Mauro Carvalho Chehab <mchehab@...pensource.com>
Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
---
 include/linux/interrupt.h | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 5888545..1de87ec 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -432,18 +432,6 @@ extern bool force_irqthreads;
 #define force_irqthreads	(0)
 #endif
 
-#ifndef local_softirq_pending
-
-#ifndef local_softirq_data_ref
-#define local_softirq_data_ref irq_stat.__softirq_data
-#endif
-
-#define local_softirq_pending()	(__this_cpu_read(local_softirq_data_ref))
-#define set_softirq_pending(x)	(__this_cpu_write(local_softirq_data_ref, (x)))
-#define or_softirq_pending(x)	(__this_cpu_or(local_softirq_data_ref, (x)))
-
-#endif /* local_softirq_pending */
-
 /* Some architectures might implement lazy enabling/disabling of
  * interrupts. In some cases, such as stop_machine, we might want
  * to ensure that after a local_irq_disable(), interrupts have
@@ -479,6 +467,19 @@ enum
 
 #define SOFTIRQ_STOP_IDLE_MASK (~(1 << RCU_SOFTIRQ))
 
+#ifndef local_softirq_pending
+
+#ifndef local_softirq_data_ref
+#define local_softirq_data_ref irq_stat.__softirq_data
+#endif
+
+#define local_softirq_pending()	(__this_cpu_read(local_softirq_data_ref))
+#define set_softirq_pending(x)	(__this_cpu_write(local_softirq_data_ref, (x)))
+#define or_softirq_pending(x)	(__this_cpu_or(local_softirq_data_ref, (x)))
+
+#endif /* local_softirq_pending */
+
+
 /* map softirq index to softirq name. update 'softirq_to_name' in
  * kernel/softirq.c when adding a new softirq.
  */
-- 
2.7.4