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proc_file_write


Is there a description available of how to use proc_file_write?  I have a 
module in kernel 2.4.18 that uses the proc filesystem for output, and am 
modifying it to read settings from proc.  The (broken) algorithm that I am 
using is:

static ssize_t my_proc_file_write(
	struct file *file,
	const char *buffer,
	size_t count,
	loff_t *ppos )
{
	int len = <read data with scanf>;
	printk( "Flag\n" );
	return( len );
}

which printk's "Flag" infinitely when I "echo 1 > /proc/my_proc_file".

What is thre proper way to use proc_file_write?

James
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