# HG changeset patch
# User Olaf Hering <olaf@xxxxxxxxx>
# Date 1304931516 -3600
# Node ID fb5313e64335e3b50f9ad7155f7f8ed067b33e8b
# Parent 1649275965f07a1bbb4e357dff740b0962be678e
xentrace: Move the global variable t_info_first_offset into
calculate_tbuf_size()
Move the global variable t_info_first_offset into
calculate_tbuf_size() because it is only used there. Change the type
from u32 to uint32_t to match type in other places.
Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
---
diff -r 1649275965f0 -r fb5313e64335 xen/common/trace.c
--- a/xen/common/trace.c Mon May 09 09:56:39 2011 +0100
+++ b/xen/common/trace.c Mon May 09 09:58:36 2011 +0100
@@ -55,7 +55,6 @@
static DEFINE_PER_CPU_READ_MOSTLY(unsigned char *, t_data);
static DEFINE_PER_CPU_READ_MOSTLY(spinlock_t, t_lock);
static u32 data_size;
-static u32 t_info_first_offset __read_mostly;
/* High water mark for trace buffers; */
/* Send virtual interrupt when buffer level reaches this point */
@@ -94,10 +93,10 @@
.notifier_call = cpu_callback
};
-static void calc_tinfo_first_offset(void)
+static uint32_t calc_tinfo_first_offset(void)
{
int offset_in_bytes = offsetof(struct t_info, mfn_offset[NR_CPUS]);
- t_info_first_offset = fit_to_type(uint32_t, offset_in_bytes);
+ return fit_to_type(uint32_t, offset_in_bytes);
}
/**
@@ -107,7 +106,7 @@
* The t_info layout is fixed and cant be changed without breaking xentrace.
* Initialize t_info_pages based on number of trace pages.
*/
-static int calculate_tbuf_size(unsigned int pages)
+static int calculate_tbuf_size(unsigned int pages, uint32_t
t_info_first_offset)
{
struct t_buf dummy_size;
typeof(dummy_size.prod) max_size;
@@ -156,6 +155,7 @@
int i, cpu, order;
/* Start after a fixed-size array of NR_CPUS */
uint32_t *t_info_mfn_list;
+ uint32_t t_info_first_offset;
int offset;
if ( t_info )
@@ -165,9 +165,9 @@
return -EINVAL;
/* Calculate offset in u32 of first mfn */
- calc_tinfo_first_offset();
+ t_info_first_offset = calc_tinfo_first_offset();
- pages = calculate_tbuf_size(pages);
+ pages = calculate_tbuf_size(pages, t_info_first_offset);
order = get_order_from_pages(pages);
t_info = alloc_xenheap_pages(get_order_from_pages(t_info_pages), 0);
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