1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index f0e99d4c066b..242257b19441 100644
--- a/drivers/oprofile/cpu_buffer.c
+++ b/drivers/oprofile/cpu_buffer.c
@@ -78,16 +78,20 @@ void free_cpu_buffers(void)
         op_ring_buffer_write = NULL;
 }
 
+#define RB_EVENT_HDR_SIZE 4
+
 int alloc_cpu_buffers(void)
 {
         int i;
 
         unsigned long buffer_size = oprofile_cpu_buffer_size;
+        unsigned long byte_size = buffer_size * (sizeof(struct op_sample) +
+                                                 RB_EVENT_HDR_SIZE);
 
-        op_ring_buffer_read = ring_buffer_alloc(buffer_size, OP_BUFFER_FLAGS);
+        op_ring_buffer_read = ring_buffer_alloc(byte_size, OP_BUFFER_FLAGS);
         if (!op_ring_buffer_read)
                 goto fail;
-        op_ring_buffer_write = ring_buffer_alloc(buffer_size, OP_BUFFER_FLAGS);
+        op_ring_buffer_write = ring_buffer_alloc(byte_size, OP_BUFFER_FLAGS);
         if (!op_ring_buffer_write)
                 goto fail;