LP_BUFFER_SIZE
if (copy_size > LP_BUFFER_SIZE)
copy_size = LP_BUFFER_SIZE;
if (copy_size > LP_BUFFER_SIZE)
copy_size = LP_BUFFER_SIZE;
if (count > LP_BUFFER_SIZE)
count = LP_BUFFER_SIZE;
lp_table[minor].lp_buffer = kmalloc(LP_BUFFER_SIZE, GFP_KERNEL);