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authorSteven Rostedt <srostedt@redhat.com>2011-03-21 22:59:21 -0400
committerSteven Rostedt <rostedt@goodmis.org>2011-04-04 12:18:24 -0400
commit0588fa30db44fd2d4032b36a061c87478a43fbee (patch)
tree2c58392c0c3bd24ae2831189aea2586de754c8f1 /kernel/trace
parent176fcc5c5f0131504a55e1e1d35389c49a9177c2 (diff)
downloadop-kernel-dev-0588fa30db44fd2d4032b36a061c87478a43fbee.zip
op-kernel-dev-0588fa30db44fd2d4032b36a061c87478a43fbee.tar.gz
tracing: Convert trace_printk() formats for module to const char *
The trace_printk() formats for modules do not show up in the debugfs/tracing/printk_formats file. Only the formats that are for trace_printk()s that are in the kernel core. To facilitate the change to add trace_printk() formats from modules into that file as well, we need to convert the structure that holds the formats from char fmt[], into const char *fmt, and allocate them separately. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_printk.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/kernel/trace/trace_printk.c b/kernel/trace/trace_printk.c
index 2547d88..b8b2681 100644
--- a/kernel/trace/trace_printk.c
+++ b/kernel/trace/trace_printk.c
@@ -32,7 +32,7 @@ static DEFINE_MUTEX(btrace_mutex);
struct trace_bprintk_fmt {
struct list_head list;
- char fmt[0];
+ const char *fmt;
};
static inline struct trace_bprintk_fmt *lookup_format(const char *fmt)
@@ -49,6 +49,7 @@ static
void hold_module_trace_bprintk_format(const char **start, const char **end)
{
const char **iter;
+ char *fmt;
mutex_lock(&btrace_mutex);
for (iter = start; iter < end; iter++) {
@@ -58,14 +59,18 @@ void hold_module_trace_bprintk_format(const char **start, const char **end)
continue;
}
- tb_fmt = kmalloc(offsetof(struct trace_bprintk_fmt, fmt)
- + strlen(*iter) + 1, GFP_KERNEL);
- if (tb_fmt) {
+ tb_fmt = kmalloc(sizeof(*tb_fmt), GFP_KERNEL);
+ if (tb_fmt)
+ fmt = kmalloc(strlen(*iter) + 1, GFP_KERNEL);
+ if (tb_fmt && fmt) {
list_add_tail(&tb_fmt->list, &trace_bprintk_fmt_list);
- strcpy(tb_fmt->fmt, *iter);
+ strcpy(fmt, *iter);
+ tb_fmt->fmt = fmt;
*iter = tb_fmt->fmt;
- } else
+ } else {
+ kfree(tb_fmt);
*iter = NULL;
+ }
}
mutex_unlock(&btrace_mutex);
}
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