genirq: Remove CONFIG_IRQ_PER_CPU

The saving of this switch is minimal versus the ifdef mess it
creates. Simple enable PER_CPU unconditionally and remove the config
switch.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 3 insertions, 16 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 2899905bfac7..ab708f27a33b 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -78,13 +78,8 @@ typedef	void (*irq_flow_handler_t)(unsigned int irq,
          IRQ_NOAUTOEN | IRQ_MOVE_PCNTXT | IRQ_LEVEL | IRQ_NO_BALANCING | \
          IRQ_PER_CPU | IRQ_NESTED_THREAD)
 
-#ifdef CONFIG_IRQ_PER_CPU
 # define CHECK_IRQ_PER_CPU(var) ((var) & IRQ_PER_CPU)
 # define IRQ_NO_BALANCING_MASK  (IRQ_PER_CPU | IRQ_NO_BALANCING)
-#else
-# define CHECK_IRQ_PER_CPU(var) 0
-# define IRQ_NO_BALANCING_MASK  IRQ_NO_BALANCING
-#endif
 
 /*
  * Return value for chip->irq_set_affinity()
diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
index 9e2256de1d1a..48ad25f5fa59 100644
--- a/kernel/irq/Kconfig
+++ b/kernel/irq/Kconfig
@@ -32,9 +32,6 @@ config GENERIC_PENDING_IRQ
 config AUTO_IRQ_AFFINITY
        def_bool n
 
-config IRQ_PER_CPU
-       def_bool n
-
 config HARDIRQS_SW_RESEND
        def_bool n
 
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index e93e6090cd47..9e32b3d35d35 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -163,9 +163,7 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
         }
 
         P(IRQ_LEVEL);
-#ifdef CONFIG_IRQ_PER_CPU
         P(IRQ_PER_CPU);
-#endif
         P(IRQ_NOPROBE);
         P(IRQ_NOREQUEST);
         P(IRQ_NOAUTOEN);
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 9a99c471d470..056aa49698b4 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -865,12 +865,10 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
                         goto mismatch;
                 }
 
-#if defined(CONFIG_IRQ_PER_CPU)
                 /* All handlers must agree on per-cpuness */
                 if ((old->flags & IRQF_PERCPU) !=
                     (new->flags & IRQF_PERCPU))
                         goto mismatch;
-#endif
 
                 /* add new interrupt at end of irq queue */
                 do {
@@ -894,15 +892,14 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
                                 goto out_mask;
                 } else
                         compat_irq_chip_set_default_handler(desc);
-#if defined(CONFIG_IRQ_PER_CPU)
-                if (new->flags & IRQF_PERCPU)
-                        desc->status |= IRQ_PER_CPU;
-#endif
 
                 desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \
                                   IRQS_INPROGRESS | IRQS_ONESHOT | \
                                   IRQS_WAITING);
 
+                if (new->flags & IRQF_PERCPU)
+                        desc->status |= IRQ_PER_CPU;
+
                 if (new->flags & IRQF_ONESHOT)
                         desc->istate |= IRQS_ONESHOT;