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kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file 

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Alexey Dobriyan 2009-09-18 12:57:09 -07:00 committed by Ingo Molnar
parent 05bafda856
commit 583a22e7c1
1 changed files with 24 additions and 21 deletions
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45
kernel/profile.c
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@ -442,48 +442,51 @@ void profile_tick(int type)
#ifdef CONFIG_PROC_FS
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <asm/uaccess.h>
static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
static int prof_cpu_mask_proc_show(struct seq_file *m, void *v)
{
int len = cpumask_scnprintf(page, count, data);
if (count - len < 2)
return -EINVAL;
len += sprintf(page + len, "\n");
return len;
seq_cpumask(m, prof_cpu_mask);
seq_putc(m, '\n');
return 0;
}
static int prof_cpu_mask_write_proc(struct file *file,
const char __user *buffer, unsigned long count, void *data)
static int prof_cpu_mask_proc_open(struct inode *inode, struct file *file)
{
return single_open(file, prof_cpu_mask_proc_show, NULL);
}
static ssize_t prof_cpu_mask_proc_write(struct file *file,
const char __user *buffer, size_t count, loff_t *pos)
{
struct cpumask *mask = data;
unsigned long full_count = count, err;
cpumask_var_t new_value;
int err;
if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
return -ENOMEM;
err = cpumask_parse_user(buffer, count, new_value);
if (!err) {
cpumask_copy(mask, new_value);
err = full_count;
cpumask_copy(prof_cpu_mask, new_value);
err = count;
}
free_cpumask_var(new_value);
return err;
}
static const struct file_operations prof_cpu_mask_proc_fops = {
.open = prof_cpu_mask_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
.write = prof_cpu_mask_proc_write,
};
void create_prof_cpu_mask(struct proc_dir_entry *root_irq_dir)
{
struct proc_dir_entry *entry;
/* create /proc/irq/prof_cpu_mask */
entry = create_proc_entry("prof_cpu_mask", 0600, root_irq_dir);
if (!entry)
return;
entry->data = prof_cpu_mask;
entry->read_proc = prof_cpu_mask_read_proc;
entry->write_proc = prof_cpu_mask_write_proc;
proc_create("prof_cpu_mask", 0600, root_irq_dir, &prof_cpu_mask_proc_fops);
}
/*