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xen
23308-xentrace_Move_the_global_variable_t_info_...
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File 23308-xentrace_Move_the_global_variable_t_info_first_offset_into_calculate_tbuf_size.patch of Package xen
changeset: 23308:fb5313e64335 user: Olaf Hering <olaf@aepfle.de> date: Mon May 09 09:58:36 2011 +0100 files: xen/common/trace.c description: 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@aepfle.de> --- xen/common/trace.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) Index: xen-4.1.2-testing/xen/common/trace.c =================================================================== --- xen-4.1.2-testing.orig/xen/common/trace.c +++ xen-4.1.2-testing/xen/common/trace.c @@ -55,7 +55,6 @@ static DEFINE_PER_CPU_READ_MOSTLY(struct 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 @@ static struct notifier_block cpu_nfb = { .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 @@ static void calc_tinfo_first_offset(void * 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 @@ static int alloc_trace_bufs(unsigned int 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 @@ static int alloc_trace_bufs(unsigned int 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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