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authorFrederic Weisbecker <fweisbec@gmail.com>2009-03-12 20:24:49 +0300
committerSteven Rostedt <srostedt@redhat.com>2009-03-13 04:15:00 +0300
commit48ead02030f849d011259244bb4ea9b985479006 (patch)
tree4500f27dc7eb6567ca79dd03fa94fe9e56fbc316 /kernel/trace/trace_mmiotrace.c
parentdb526ca329f855510e8ce672332eba3304aed590 (diff)
downloadlinux-48ead02030f849d011259244bb4ea9b985479006.tar.xz
tracing/core: bring back raw trace_printk for dynamic formats strings
Impact: fix callsites with dynamic format strings Since its new binary implementation, trace_printk() internally uses static containers for the format strings on each callsites. But the value is assigned once at build time, which means that it can't take dynamic formats. So this patch unearthes the raw trace_printk implementation for the callers that will need trace_printk to be able to carry these dynamic format strings. The trace_printk() macro will use the appropriate implementation for each callsite. Most of the time however, the binary implementation will still be used. The other impact of this patch is that mmiotrace_printk() will use the old implementation because it calls the low level trace_vprintk and we can't guess here whether the format passed in it is dynamic or not. Some parts of this patch have been written by Steven Rostedt (most notably the part that chooses the appropriate implementation for each callsites). Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Diffstat (limited to 'kernel/trace/trace_mmiotrace.c')
-rw-r--r--kernel/trace/trace_mmiotrace.c7
1 files changed, 2 insertions, 5 deletions
diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c
index 23e346a734ca..f095916e477f 100644
--- a/kernel/trace/trace_mmiotrace.c
+++ b/kernel/trace/trace_mmiotrace.c
@@ -254,6 +254,7 @@ static enum print_line_t mmio_print_mark(struct trace_iterator *iter)
{
struct trace_entry *entry = iter->ent;
struct print_entry *print = (struct print_entry *)entry;
+ const char *msg = print->buf;
struct trace_seq *s = &iter->seq;
unsigned long long t = ns2usecs(iter->ts);
unsigned long usec_rem = do_div(t, USEC_PER_SEC);
@@ -261,11 +262,7 @@ static enum print_line_t mmio_print_mark(struct trace_iterator *iter)
int ret;
/* The trailing newline must be in the message. */
- ret = trace_seq_printf(s, "MARK %u.%06lu ", secs, usec_rem);
- if (!ret)
- return TRACE_TYPE_PARTIAL_LINE;
-
- ret = trace_seq_bprintf(s, print->fmt, print->buf);
+ ret = trace_seq_printf(s, "MARK %u.%06lu %s", secs, usec_rem, msg);
if (!ret)
return TRACE_TYPE_PARTIAL_LINE;