[patch V6 06/37] genirq: Provde __irq_enter/exit_raw()

From: Thomas Gleixner
Date: Fri May 15 2020 - 20:10:54 EST



Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>

diff --git a/include/linux/hardirq.h b/include/linux/hardirq.h
index f6f25fab34cb..adfd98b8a468 100644
--- a/include/linux/hardirq.h
+++ b/include/linux/hardirq.h
@@ -41,6 +41,17 @@ extern void rcu_nmi_exit(void);
} while (0)

/*
+ * Like __irq_enter() without time accounting for fast
+ * interrupts, e.g. reschedule IPI where time accounting
+ * is more expensive than the actual interrupt.
+ */
+#define __irq_enter_raw() \
+ do { \
+ preempt_count_add(HARDIRQ_OFFSET); \
+ lockdep_hardirq_enter(); \
+ } while (0)
+
+/*
* Enter irq context (on NO_HZ, update jiffies):
*/
void irq_enter(void);
@@ -60,6 +71,15 @@ void irq_enter_rcu(void);
} while (0)

/*
+ * Like __irq_exit() without time accounting
+ */
+#define __irq_exit_raw() \
+ do { \
+ lockdep_hardirq_exit(); \
+ preempt_count_sub(HARDIRQ_OFFSET); \
+ } while (0)
+
+/*
* Exit irq context and process softirqs if needed:
*/
void irq_exit(void);