[PATCH] genirq: cleanup: merge irq_affinity[] into irq_desc[]

Consolidation: remove the irq_affinity[NR_IRQS] array and move it into the
irq_desc[NR_IRQS].affinity field.

[akpm@osdl.org: sparc64 build fix]
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

14 files changed, 26 insertions, 24 deletions

diff --git a/arch/alpha/kernel/irq.c b/arch/alpha/kernel/irq.c
index ec9d243d42c9..63af36cf7f6e 100644
--- a/arch/alpha/kernel/irq.c
+++ b/arch/alpha/kernel/irq.c
@@ -56,7 +56,7 @@ select_smp_affinity(unsigned int irq)
                 cpu = (cpu < (NR_CPUS-1) ? cpu + 1 : 0);
         last_cpu = cpu;
 
-        irq_affinity[irq] = cpumask_of_cpu(cpu);
+        irq_desc[irq].affinity = cpumask_of_cpu(cpu);
         irq_desc[irq].chip->set_affinity(irq, cpumask_of_cpu(cpu));
         return 0;
 }
diff --git a/arch/i386/kernel/irq.c b/arch/i386/kernel/irq.c
index b942a5918dab..3336cef9605a 100644
--- a/arch/i386/kernel/irq.c
+++ b/arch/i386/kernel/irq.c
@@ -291,7 +291,7 @@ void fixup_irqs(cpumask_t map)
                 if (irq == 2)
                         continue;
 
-                cpus_and(mask, irq_affinity[irq], map);
+                cpus_and(mask, irq_desc[irq].affinity, map);
                 if (any_online_cpu(mask) == NR_CPUS) {
                         printk("Breaking affinity for irq %i\n", irq);
                         mask = map;
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index 2645153dba8a..c4e1b3b60b48 100644
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -100,7 +100,7 @@ void set_irq_affinity_info (unsigned int irq, int hwid, int redir)
         cpu_set(cpu_logical_id(hwid), mask);
 
         if (irq < NR_IRQS) {
-                irq_affinity[irq] = mask;
+                irq_desc[irq].affinity = mask;
                 irq_redir[irq] = (char) (redir & 0xff);
         }
 }
@@ -131,7 +131,7 @@ static void migrate_irqs(void)
                 if (desc->status == IRQ_PER_CPU)
                         continue;
 
-                cpus_and(mask, irq_affinity[irq], cpu_online_map);
+                cpus_and(mask, irq_desc[irq].affinity, cpu_online_map);
                 if (any_online_cpu(mask) == NR_CPUS) {
                         /*
                          * Save it for phase 2 processing
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 26e69f73fdb0..ea6a55e1a0c5 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -94,7 +94,7 @@ int cpu_check_affinity(unsigned int irq, cpumask_t *dest)
         if (irq == TIMER_IRQ || irq == IPI_IRQ) {
                 /* Bad linux design decision.  The mask has already
                  * been set; we must reset it */
-                irq_affinity[irq] = CPU_MASK_ALL;
+                irq_desc[irq].affinity = CPU_MASK_ALL;
                 return -EINVAL;
         }
 
@@ -110,7 +110,7 @@ static void cpu_set_affinity_irq(unsigned int irq, cpumask_t dest)
         if (cpu_check_affinity(irq, &dest))
                 return;
 
-        irq_affinity[irq] = dest;
+        irq_desc[irq].affinity = dest;
 }
 #endif
 
@@ -265,7 +265,7 @@ int txn_alloc_irq(unsigned int bits_wide)
 unsigned long txn_affinity_addr(unsigned int irq, int cpu)
 {
 #ifdef CONFIG_SMP
-        irq_affinity[irq] = cpumask_of_cpu(cpu);
+        irq_desc[irq].affinity = cpumask_of_cpu(cpu);
 #endif
 
         return cpu_data[cpu].txn_addr;
@@ -326,7 +326,7 @@ void do_cpu_irq_mask(struct pt_regs *regs)
                 /* Work our way from MSb to LSb...same order we alloc EIRs */
                 for (irq = TIMER_IRQ; eirr_val && bit; bit>>=1, irq++) {
 #ifdef CONFIG_SMP
-                        cpumask_t dest = irq_affinity[irq];
+                        cpumask_t dest = irq_desc[irq].affinity;
 #endif
                         if (!(bit & eirr_val))
                                 continue;
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 8cfc779d882d..24f6050aa4ab 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -164,7 +164,7 @@ void fixup_irqs(cpumask_t map)
                 if (irq_desc[irq].status & IRQ_PER_CPU)
                         continue;
 
-                cpus_and(mask, irq_affinity[irq], map);
+                cpus_and(mask, irq_desc[irq].affinity, map);
                 if (any_online_cpu(mask) == NR_CPUS) {
                         printk("Breaking affinity for irq %i\n", irq);
                         mask = map;
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index bdc9e26a93cf..19c03dd43000 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -238,7 +238,7 @@ static int get_irq_server(unsigned int irq)
 {
         unsigned int server;
         /* For the moment only implement delivery to all cpus or one cpu */
-        cpumask_t cpumask = irq_affinity[irq];
+        cpumask_t cpumask = irq_desc[irq].affinity;
         cpumask_t tmp = CPU_MASK_NONE;
 
         if (!distribute_irqs)
@@ -729,7 +729,7 @@ void xics_migrate_irqs_away(void)
 
                 /* Reset affinity to all cpus */
                 desc->chip->set_affinity(virq, CPU_MASK_ALL);
-                irq_affinity[virq] = CPU_MASK_ALL;
+                irq_desc[irq].affinity = CPU_MASK_ALL;
 unlock:
                 spin_unlock_irqrestore(&desc->lock, flags);
         }
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index f4613ee6b7a2..28df9c827ca6 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -906,7 +906,7 @@ void mpic_setup_this_cpu(void)
         /* let the mpic know we want intrs. default affinity is 0xffffffff
          * until changed via /proc. That's how it's done on x86. If we want
          * it differently, then we should make sure we also change the default
-         * values of irq_affinity in irq.c.
+         * values of irq_desc[].affinity in irq.c.
          */
         if (distribute_irqs) {
                 for (i = 0; i < mpic->num_sources ; i++)
diff --git a/arch/ppc/syslib/open_pic.c b/arch/ppc/syslib/open_pic.c
index 822058c2983e..767a0bc95817 100644
--- a/arch/ppc/syslib/open_pic.c
+++ b/arch/ppc/syslib/open_pic.c
@@ -615,8 +615,8 @@ void __devinit do_openpic_setup_cpu(void)
         /* let the openpic know we want intrs. default affinity
          * is 0xffffffff until changed via /proc
          * That's how it's done on x86. If we want it differently, then
-         * we should make sure we also change the default values of irq_affinity
-         * in irq.c.
+         * we should make sure we also change the default values of
+         * irq_desc[].affinity in irq.c.
          */
         for (i = 0; i < NumSources; i++)
                 openpic_mapirq(i, msk, CPU_MASK_ALL);
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 5d7c821ab7f6..ab9e640df228 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -224,7 +224,7 @@ static inline struct ino_bucket *virt_irq_to_bucket(unsigned int virt_irq)
 #ifdef CONFIG_SMP
 static int irq_choose_cpu(unsigned int virt_irq)
 {
-        cpumask_t mask = irq_affinity[virt_irq];
+        cpumask_t mask = irq_desc[virt_irq].affinity;
         int cpuid;
 
         if (cpus_equal(mask, CPU_MASK_ALL)) {
diff --git a/arch/x86_64/kernel/irq.c b/arch/x86_64/kernel/irq.c
index 0c2fb2c77bd0..a1f1df5f7bfc 100644
--- a/arch/x86_64/kernel/irq.c
+++ b/arch/x86_64/kernel/irq.c
@@ -146,7 +146,7 @@ void fixup_irqs(cpumask_t map)
                 if (irq == 2)
                         continue;
 
-                cpus_and(mask, irq_affinity[irq], map);
+                cpus_and(mask, irq_desc[irq].affinity, map);
                 if (any_online_cpu(mask) == NR_CPUS) {
                         printk("Breaking affinity for irq %i\n", irq);
                         mask = map;
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 9597a6904239..6e3ad6245bd3 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -77,6 +77,9 @@ typedef struct irq_desc {
         unsigned int irq_count;         /* For detecting broken interrupts */
         unsigned int irqs_unhandled;
         spinlock_t lock;
+#ifdef CONFIG_SMP
+        cpumask_t affinity;
+#endif
 #if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
         unsigned int move_irq;          /* Flag need to re-target intr dest*/
 #endif
@@ -96,12 +99,10 @@ irq_descp (int irq)
 extern int setup_irq(unsigned int irq, struct irqaction * new);
 
 #ifdef CONFIG_GENERIC_HARDIRQS
-extern cpumask_t irq_affinity[NR_IRQS];
-
 #ifdef CONFIG_SMP
 static inline void set_native_irq_info(int irq, cpumask_t mask)
 {
-        irq_affinity[irq] = mask;
+        irq_desc[irq].affinity = mask;
 }
 #else
 static inline void set_native_irq_info(int irq, cpumask_t mask)
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index f9d95705a4ac..cc786aaf30d6 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -32,7 +32,10 @@ irq_desc_t irq_desc[NR_IRQS] __cacheline_aligned = {
         [0 ... NR_IRQS-1] = {
                 .status = IRQ_DISABLED,
                 .chip = &no_irq_type,
-                .lock = SPIN_LOCK_UNLOCKED
+                .lock = SPIN_LOCK_UNLOCKED,
+#ifdef CONFIG_SMP
+                .affinity = CPU_MASK_ALL
+#endif
         }
 };
 
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 31ee1f3bfcf9..c53662edc73d 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -16,8 +16,6 @@
 
 #ifdef CONFIG_SMP
 
-cpumask_t irq_affinity[NR_IRQS] = { [0 ... NR_IRQS-1] = CPU_MASK_ALL };
-
 #if defined (CONFIG_GENERIC_PENDING_IRQ) || defined (CONFIG_IRQBALANCE)
 cpumask_t __cacheline_aligned pending_irq_cpumask[NR_IRQS];
 #endif
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index 90fe05f23e69..847b98a611e0 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -36,7 +36,7 @@ void proc_set_irq_affinity(unsigned int irq, cpumask_t mask_val)
 void proc_set_irq_affinity(unsigned int irq, cpumask_t mask_val)
 {
         set_balance_irq_affinity(irq, mask_val);
-        irq_affinity[irq] = mask_val;
+        irq_desc[irq].affinity = mask_val;
         irq_desc[irq].chip->set_affinity(irq, mask_val);
 }
 #endif
@@ -44,7 +44,7 @@ void proc_set_irq_affinity(unsigned int irq, cpumask_t mask_val)
 static int irq_affinity_read_proc(char *page, char **start, off_t off,
                                   int count, int *eof, void *data)
 {
-        int len = cpumask_scnprintf(page, count, irq_affinity[(long)data]);
+        int len = cpumask_scnprintf(page, count, irq_desc[(long)data].affinity);
 
         if (count - len < 2)
                 return -EINVAL;