diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c index 1a57df385996dd50027296615316462a5496a915..23979d38dde761a048ab52e38dcd5e628b94aa7e 100644 --- a/drivers/oprofile/cpu_buffer.c +++ b/drivers/oprofile/cpu_buffer.c @@ -86,9 +86,9 @@ static unsigned long nr_available_slots(struct oprofile_cpu_buffer const * b) unsigned long tail = b->tail_pos; if (tail > head) - return tail - head; + return (tail - head) - 1; - return tail + (b->buffer_size - head); + return tail + (b->buffer_size - head) - 1; }