Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-nmw

[deliverable/linux.git] / drivers / oprofile / cpu_buffer.c

diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c
index f0e99d4c066b9acfeada76a623258d5fda744b5d..242257b19441fb31bc95b0ba10324ffc2ec8df35 100644 (file)
--- 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;