Exporting information from kernel space to user space via sysfs - linux-kernel

Question

I wrote a kernel module memory leak detector that works by adding information about possible memory leaks to a list. I want to be able to loop through the list and write the information the a file for the user, this would be easy to do in user space with the code below but how world I use sysfs to export that information from kernel space to user so that the user can read it in a file?
/*
* writes a memory leak summary to a file
*/
void mem_leak_summary(void)
{
unsigned int i;
MEM_PROFILER_LIST * mem_output;
FILE * fp_write = fopen (SUMMARY_FILE, "wt");
char info[1024];
if(fp_write != NULL)
{
fwrite(info, (strlen(info) + 1) , 1, fp_write);
sprintf(info, "%s\n", "-----------------------------------");
fwrite(info, (strlen(info) + 1) , 1, fp_write);
for(mem_output= ptr_start; mem_output!= NULL; mem_output= mem_output->next)
{
sprintf(info, "address : %d\n", leak_info->mem_output.address);
fwrite(info, (strlen(info) + 1) , 1, fp_write);
sprintf(info, "size : %d bytes\n", leak_info->mem_output.size);
fwrite(info, (strlen(info) + 1) , 1, fp_write);
sprintf(info, "line : %d\n", leak_info->mem_output.line);
fwrite(info, (strlen(info) + 1) , 1, fp_write);
sprintf(info, "%s\n", "-----------------------------------");
fwrite(info, (strlen(info) + 1) , 1, fp_write);
}
}
clear();
}

Answer 1

I can't say for /sys, but for /proc it's rather straightforward to do such things. This site shows how to create a /proc entry which can be cat'd.