[CPUFREQ] deprecate proc_intf, and inform of removal ~2005-01-01

The /proc/cpufreq interface was deprecated already when cpufreq was merged
into the kernel. With 2.7. not appearing soon, let's do the same what's
suggested for devfs and others: inform users of it being deprecated.
Signed-off-by: Dominik Brodowski <linux@brodo.de>
Signed-off-by: Dave Jones <davej@redhat.com>

drivers/cpufreq/proc_intf.c

@@ -12,9 +12,12 @@
 #include <linux/proc_fs.h>
 #include <asm/uaccess.h>
 
+#warning This module will be removed from the 2.6. kernel series soon after 2005-01-01
 
 #define CPUFREQ_ALL_CPUS		((NR_CPUS))
 
+static unsigned int warning_print = 0;
+
 /**
  * cpufreq_parse_policy - parse a policy string
  * @input_string: the string to parse.
@@ -110,6 +113,11 @@ static int cpufreq_proc_read (
 	if (off != 0)
 		goto end;
 
+	if (!warning_print) {
+		warning_print++;
+		printk(KERN_INFO "Access to /proc/cpufreq is deprecated and will be removed from (new) 2.6. kernels soon after 2005-01-01");
+	}
+
 	p += sprintf(p, "          minimum CPU frequency  -  maximum CPU frequency  -  policy\n");
 	for (i=0;i<NR_CPUS;i++) {
 		if (!cpu_online(i))
@@ -180,6 +188,11 @@ static int cpufreq_proc_write (
 	if (copy_from_user(proc_string, buffer, count))
 		return -EFAULT;
 
+	if (!warning_print) {
+		warning_print++;
+		printk(KERN_INFO "Access to /proc/cpufreq is deprecated and will be removed from (new) 2.6. kernels soon after 2005-01-01");
+	}
+	
 	proc_string[count] = '\0';
 
 	result = cpufreq_parse_policy(proc_string, &policy);