MIPS: TXx9: Cache fixup

[linux-2.6-omap-h63xx.git] / kernel / irq / proc.c

diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index c2f2ccb0549a18a8552e0c8a018a198e4c70195e..a09dd29c2fd748dea1dd83fd00b73751aa649316 100644 (file)
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -8,6 +8,7 @@
 
 #include <linux/irq.h>
 #include <linux/proc_fs.h>
+#include <linux/seq_file.h>
 #include <linux/interrupt.h>
 
 #include "internals.h"
@@ -16,23 +17,18 @@ static struct proc_dir_entry *root_irq_dir;
 
 #ifdef CONFIG_SMP
 
-static int irq_affinity_read_proc(char *page, char **start, off_t off,
-                                 int count, int *eof, void *data)
+static int irq_affinity_proc_show(struct seq_file *m, void *v)
 {
-       struct irq_desc *desc = irq_desc + (long)data;
+       struct irq_desc *desc = irq_desc + (long)m->private;
        cpumask_t *mask = &desc->affinity;
-       int len;
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
        if (desc->status & IRQ_MOVE_PENDING)
                mask = &desc->pending_mask;
 #endif
-       len = cpumask_scnprintf(page, count, *mask);
-
-       if (count - len < 2)
-               return -EINVAL;
-       len += sprintf(page + len, "\n");
-       return len;
+       seq_cpumask(m, mask);
+       seq_putc(m, '\n');
+       return 0;
 }
 
 #ifndef is_affinity_mask_valid
@@ -40,11 +36,12 @@ static int irq_affinity_read_proc(char *page, char **start, off_t off,
 #endif
 
 int no_irq_affinity;
-static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
-                                  unsigned long count, void *data)
+static ssize_t irq_affinity_proc_write(struct file *file,
+               const char __user *buffer, size_t count, loff_t *pos)
 {
-       unsigned int irq = (int)(long)data, full_count = count, err;
-       cpumask_t new_value, tmp;
+       unsigned int irq = (int)(long)PDE(file->f_path.dentry->d_inode)->data;
+       cpumask_t new_value;
+       int err;
 
        if (!irq_desc[irq].chip->set_affinity || no_irq_affinity ||
            irq_balancing_disabled(irq))
@@ -62,17 +59,74 @@ static int irq_affinity_write_proc(struct file *file, const char __user *buffer,
         * way to make the system unusable accidentally :-) At least
         * one online CPU still has to be targeted.
         */
-       cpus_and(tmp, new_value, cpu_online_map);
-       if (cpus_empty(tmp))
+       if (!cpus_intersects(new_value, cpu_online_map))
                /* Special case for empty set - allow the architecture
                   code to set default SMP affinity. */
-               return select_smp_affinity(irq) ? -EINVAL : full_count;
+               return irq_select_affinity(irq) ? -EINVAL : count;
 
        irq_set_affinity(irq, new_value);
 
-       return full_count;
+       return count;
+}
+
+static int irq_affinity_proc_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, irq_affinity_proc_show, PDE(inode)->data);
+}
+
+static const struct file_operations irq_affinity_proc_fops = {
+       .open           = irq_affinity_proc_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+       .write          = irq_affinity_proc_write,
+};
+
+static int default_affinity_show(struct seq_file *m, void *v)
+{
+       seq_cpumask(m, &irq_default_affinity);
+       seq_putc(m, '\n');
+       return 0;
+}
+
+static ssize_t default_affinity_write(struct file *file,
+               const char __user *buffer, size_t count, loff_t *ppos)
+{
+       cpumask_t new_value;
+       int err;
+
+       err = cpumask_parse_user(buffer, count, new_value);
+       if (err)
+               return err;
+
+       if (!is_affinity_mask_valid(new_value))
+               return -EINVAL;
+
+       /*
+        * 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.
+        */
+       if (!cpus_intersects(new_value, cpu_online_map))
+               return -EINVAL;
+
+       irq_default_affinity = new_value;
+
+       return count;
+}
+
+static int default_affinity_open(struct inode *inode, struct file *file)
+{
+       return single_open(file, default_affinity_show, NULL);
 }
 
+static const struct file_operations default_affinity_proc_fops = {
+       .open           = default_affinity_open,
+       .read           = seq_read,
+       .llseek         = seq_lseek,
+       .release        = single_release,
+       .write          = default_affinity_write,
+};
 #endif
 
 static int irq_spurious_read(char *page, char **start, off_t off,
@@ -144,16 +198,9 @@ void register_irq_proc(unsigned int irq)
        irq_desc[irq].dir = proc_mkdir(name, root_irq_dir);
 
 #ifdef CONFIG_SMP
-       {
-               /* create /proc/irq/<irq>/smp_affinity */
-               entry = create_proc_entry("smp_affinity", 0600, irq_desc[irq].dir);
-
-               if (entry) {
-                       entry->data = (void *)(long)irq;
-                       entry->read_proc = irq_affinity_read_proc;
-                       entry->write_proc = irq_affinity_write_proc;
-               }
-       }
+       /* create /proc/irq/<irq>/smp_affinity */
+       proc_create_data("smp_affinity", 0600, irq_desc[irq].dir,
+                        &irq_affinity_proc_fops, (void *)(long)irq);
 #endif
 
        entry = create_proc_entry("spurious", 0444, irq_desc[irq].dir);
@@ -171,6 +218,14 @@ void unregister_handler_proc(unsigned int irq, struct irqaction *action)
                remove_proc_entry(action->dir->name, irq_desc[irq].dir);
 }
 
+void register_default_affinity_proc(void)
+{
+#ifdef CONFIG_SMP
+       proc_create("irq/default_smp_affinity", 0600, NULL,
+                   &default_affinity_proc_fops);
+#endif
+}
+
 void init_irq_proc(void)
 {
        int i;
@@ -180,6 +235,8 @@ void init_irq_proc(void)
        if (!root_irq_dir)
                return;
 
+       register_default_affinity_proc();
+
        /*
         * Create entries for all existing IRQs.
         */