[Patch 1/2] ksym_tracer:Fix line-wrapping after removal of ksym tracer entry

["K.Prasad" <prasad@linux.vnet.ibm.com>]

[-- Attachment #1: ksym_tracer_upstream_01 --]
[-- Type: text/plain, Size: 1691 bytes --]

Removal of a ksym entry results in missing information and an early return with
TRACE_TYPE_PARTIAL_LINE code (minus the line return). This patch modifies the
output function to unconditionally add a line return irrespective of the
return code. 

Signed-off-by: K.Prasad <prasad@linux.vnet.ibm.com>
---
 kernel/trace/trace_ksym.c |   27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

Index: linux-2.6-tip.hbkpt/kernel/trace/trace_ksym.c
===================================================================
--- linux-2.6-tip.hbkpt.orig/kernel/trace/trace_ksym.c
+++ linux-2.6-tip.hbkpt/kernel/trace/trace_ksym.c
@@ -391,29 +391,32 @@ static enum print_line_t ksym_trace_outp
 
 	ret = trace_seq_printf(s, "%-15s %-5d %-3d %-20s ", field->p_name,
 				entry->pid, iter->cpu, field->ksym_name);
-	if (!ret)
-		return TRACE_TYPE_PARTIAL_LINE;
+	if (!ret) {
+		ret = TRACE_TYPE_PARTIAL_LINE;
+		goto err_ret;
+	}
 
+	ret = TRACE_TYPE_PARTIAL_LINE;
 	switch (field->ksym_hbp->info.type) {
 	case HW_BREAKPOINT_WRITE:
-		ret = trace_seq_printf(s, " W  ");
+		if (!trace_seq_printf(s, " W  "))
+			goto err_ret;
 		break;
 	case HW_BREAKPOINT_RW:
-		ret = trace_seq_printf(s, " RW ");
+		if (!trace_seq_printf(s, " RW  "))
+			goto err_ret;
 		break;
 	default:
-		return TRACE_TYPE_PARTIAL_LINE;
+		goto err_ret;
 	}
 
-	if (!ret)
-		return TRACE_TYPE_PARTIAL_LINE;
-
 	sprint_symbol(str, field->ip);
 	ret = trace_seq_printf(s, "%-20s\n", str);
-	if (!ret)
-		return TRACE_TYPE_PARTIAL_LINE;
-
-	return TRACE_TYPE_HANDLED;
+	if (ret)
+		return TRACE_TYPE_HANDLED;
+err_ret:
+	trace_seq_printf(s, "\n");
+	return ret;
 }
 
 struct tracer ksym_tracer __read_mostly =