This commit was manufactured by cvs2svn to create tag

[linux-2.6.git] / arch / alpha / kernel / irq.c

diff --git a/arch/alpha/kernel/irq.c b/arch/alpha/kernel/irq.c
index ee98752..9e8eab6 100644 (file)
--- a/arch/alpha/kernel/irq.c
+++ b/arch/alpha/kernel/irq.c
@@ -227,7 +227,7 @@ static struct proc_dir_entry * irq_dir[NR_IRQS];
 #ifdef CONFIG_SMP 
 static struct proc_dir_entry * smp_affinity_entry[NR_IRQS];
 static char irq_user_affinity[NR_IRQS];
-static cpumask_t irq_affinity[NR_IRQS] = { [0 ... NR_IRQS-1] = CPU_MASK_ALL };
+static unsigned long irq_affinity[NR_IRQS] = { [0 ... NR_IRQS-1] = ~0UL };
 
 static void
 select_smp_affinity(int irq)
@@ -238,14 +238,16 @@ select_smp_affinity(int irq)
        if (! irq_desc[irq].handler->set_affinity || irq_user_affinity[irq])
                return;
 
-       while (!cpu_possible(cpu))
+       while (((cpu_present_mask >> cpu) & 1) == 0)
                cpu = (cpu < (NR_CPUS-1) ? cpu + 1 : 0);
        last_cpu = cpu;
 
-       irq_affinity[irq] = cpumask_of_cpu(cpu);
-       irq_desc[irq].handler->set_affinity(irq, cpumask_of_cpu(cpu));
+       irq_affinity[irq] = 1UL << cpu;
+       irq_desc[irq].handler->set_affinity(irq, 1UL << cpu);
 }
 
+#define HEX_DIGITS 16
+
 static int
 irq_affinity_read_proc (char *page, char **start, off_t off,
                        int count, int *eof, void *data)
@@ -257,28 +259,67 @@ irq_affinity_read_proc (char *page, char **start, off_t off,
        return len;
 }
 
+static unsigned int
+parse_hex_value (const char __user *buffer,
+                unsigned long count, unsigned long *ret)
+{
+       unsigned char hexnum [HEX_DIGITS];
+       unsigned long value;
+       unsigned long i;
+
+       if (!count)
+               return -EINVAL;
+       if (count > HEX_DIGITS)
+               count = HEX_DIGITS;
+       if (copy_from_user(hexnum, buffer, count))
+               return -EFAULT;
+
+       /*
+        * Parse the first 8 characters as a hex string, any non-hex char
+        * is end-of-string. '00e1', 'e1', '00E1', 'E1' are all the same.
+        */
+       value = 0;
+
+       for (i = 0; i < count; i++) {
+               unsigned int c = hexnum[i];
+
+               switch (c) {
+                       case '0' ... '9': c -= '0'; break;
+                       case 'a' ... 'f': c -= 'a'-10; break;
+                       case 'A' ... 'F': c -= 'A'-10; break;
+               default:
+                       goto out;
+               }
+               value = (value << 4) | c;
+       }
+out:
+       *ret = value;
+       return 0;
+}
+
 static int
 irq_affinity_write_proc(struct file *file, const char __user *buffer,
                        unsigned long count, void *data)
 {
        int irq = (long) data, full_count = count, err;
-       cpumask_t new_value;
+       unsigned long new_value;
 
        if (!irq_desc[irq].handler->set_affinity)
                return -EIO;
 
-       err = cpumask_parse(buffer, count, new_value);
+       err = parse_hex_value(buffer, count, &new_value);
 
        /* The special value 0 means release control of the
           affinity to kernel.  */
-       cpus_and(new_value, new_value, cpu_online_map);
-       if (cpus_empty(new_value)) {
+       if (new_value == 0) {
                irq_user_affinity[irq] = 0;
                select_smp_affinity(irq);
        }
        /* Do not allow disabling IRQs completely - it's a too easy
           way to make the system unusable accidentally :-) At least
           one online CPU still has to be targeted.  */
+       else if (!(new_value & cpu_present_mask))
+               return -EINVAL;
        else {
                irq_affinity[irq] = new_value;
                irq_user_affinity[irq] = 1;
@@ -303,10 +344,10 @@ static int
 prof_cpu_mask_write_proc(struct file *file, const char __user *buffer,
                         unsigned long count, void *data)
 {
-       unsigned long full_count = count, err;
-       cpumask_t new_value, *mask = (cpumask_t *)data;
+       unsigned long *mask = (unsigned long *) data, full_count = count, err;
+       unsigned long new_value;
 
-       err = cpumask_parse(buffer, count, new_value);
+       err = parse_hex_value(buffer, count, &new_value);
        if (err)
                return err;
 
@@ -361,7 +402,7 @@ init_irq_proc (void)
        int i;
 
        /* create /proc/irq */
-       root_irq_dir = proc_mkdir("irq", NULL);
+       root_irq_dir = proc_mkdir("irq", 0);
 
 #ifdef CONFIG_SMP 
        /* create /proc/irq/prof_cpu_mask */
@@ -416,7 +457,7 @@ request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs
 
        action->handler = handler;
        action->flags = irqflags;
-       cpus_clear(action->mask);
+       action->mask = 0;
        action->name = devname;
        action->next = NULL;
        action->dev_id = dev_id;