linux-kernel - [PATCH 22/37] softirq: Move vectors bits to bottom

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Date:   Thu, 28 Feb 2019 18:12:27 +0100
From:   Frederic Weisbecker <frederic@...nel.org>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     Frederic Weisbecker <fweisbec@...il.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Peter Zijlstra <peterz@...radead.org>,
        "David S . Miller" <davem@...emloft.net>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        "Paul E . McKenney" <paulmck@...ux.vnet.ibm.com>,
        Frederic Weisbecker <frederic@...nel.org>,
        Pavan Kondeti <pkondeti@...eaurora.org>,
        Ingo Molnar <mingo@...nel.org>,
        Joel Fernandes <joel@...lfernandes.org>
Subject: [PATCH 22/37] softirq: Move vectors bits to bottom_half.h

From: Frederic Weisbecker <fweisbec@...il.com>

Using the bottom-half masking APIs defined in linux/bottom-half.h won't
be possible without passing the relevant softirq vectors that are
currently defined in linux/interrupt.h

Yet we can't include linux/interrupt.h from linux/bottom-half.h due to
circular dependencies.

Now the vector bits belong to bottom halves anyway, so moving them there
is more natural and avoid nasty header dances.

Reviewed-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Frederic Weisbecker <fweisbec@...il.com>
Cc: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Cc: Joel Fernandes <joel@...lfernandes.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Pavan Kondeti <pkondeti@...eaurora.org>
Cc: Paul E . McKenney <paulmck@...ux.vnet.ibm.com>
Cc: David S . Miller <davem@...emloft.net>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
---
 include/linux/bottom_half.h | 24 ++++++++++++++++++++++++
 include/linux/interrupt.h   | 21 ---------------------
 2 files changed, 24 insertions(+), 21 deletions(-)

diff --git a/include/linux/bottom_half.h b/include/linux/bottom_half.h
index a104f815efcf..39aaf9189226 100644
--- a/include/linux/bottom_half.h
+++ b/include/linux/bottom_half.h
@@ -4,6 +4,30 @@
 
 #include <linux/preempt.h>
 
+
+/*
+ * PLEASE, avoid to allocate new softirqs, if you need not _really_ high
+ * frequency threaded job scheduling. For almost all the purposes
+ * tasklets are more than enough. F.e. all serial device BHs et
+ * al. should be converted to tasklets, not to softirqs.
+ */
+enum
+{
+#define SOFTIRQ_VECTOR(__SVEC) \
+	__SVEC##_SOFTIRQ,
+#include <linux/softirq_vector.h>
+#undef SOFTIRQ_VECTOR
+	NR_SOFTIRQS
+};
+
+#define SOFTIRQ_STOP_IDLE_MASK (~(1 << RCU_SOFTIRQ))
+#define SOFTIRQ_ALL_MASK (BIT(NR_SOFTIRQS) - 1)
+
+#define SOFTIRQ_ENABLED_SHIFT 16
+#define SOFTIRQ_PENDING_MASK (BIT(SOFTIRQ_ENABLED_SHIFT) - 1)
+
+
+
 #ifdef CONFIG_TRACE_IRQFLAGS
 extern void __local_bh_disable_ip(unsigned long ip, unsigned int cnt);
 #else
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 0c3590e4fcac..1f4bd62ae218 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -457,27 +457,6 @@ extern bool force_irqthreads;
 #define hard_irq_disable()	do { } while(0)
 #endif
 
-/* PLEASE, avoid to allocate new softirqs, if you need not _really_ high
-   frequency threaded job scheduling. For almost all the purposes
-   tasklets are more than enough. F.e. all serial device BHs et
-   al. should be converted to tasklets, not to softirqs.
- */
-enum
-{
-#define SOFTIRQ_VECTOR(__SVEC) \
-	__SVEC##_SOFTIRQ,
-#include <linux/softirq_vector.h>
-#undef SOFTIRQ_VECTOR
-	NR_SOFTIRQS
-};
-
-#define SOFTIRQ_STOP_IDLE_MASK (~(1 << RCU_SOFTIRQ))
-#define SOFTIRQ_ALL_MASK (BIT(NR_SOFTIRQS) - 1)
-
-#define SOFTIRQ_ENABLED_SHIFT 16
-#define SOFTIRQ_PENDING_MASK (BIT(SOFTIRQ_ENABLED_SHIFT) - 1)
-
-
 #ifndef local_softirq_data
 
 #ifndef local_softirq_data_ref
-- 
2.21.0