From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Sat, 12 Apr 2025 22:10:44 +0000 (+0200)
Subject: ftrace: Expose call graph depth as unsigned int
X-Git-Tag: v6.16-rc1~121^2~26
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=761ef34228222686f9f8c5fccd258e17a0c3d6de;p=linux-block.git

ftrace: Expose call graph depth as unsigned int

Depth is stored as int because the code uses negative values to break
out of iterations. But what is recorded is always zero or positive. So
expose it as unsigned int instead of int.

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Link: https://lore.kernel.org/20250412221847.17310-3-iii@linux.ibm.com
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
---

diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index 4ef4df6623a8..de294ae2c5c5 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -97,11 +97,11 @@ FTRACE_ENTRY_PACKED(fgraph_retaddr_entry, fgraph_retaddr_ent_entry,
 	F_STRUCT(
 		__field_struct(	struct fgraph_retaddr_ent,	graph_ent	)
 		__field_packed(	unsigned long,	graph_ent,	func		)
-		__field_packed(	int,		graph_ent,	depth		)
+		__field_packed(	unsigned int,	graph_ent,	depth		)
 		__field_packed(	unsigned long,	graph_ent,	retaddr		)
 	),
 
-	F_printk("--> %ps (%d) <- %ps", (void *)__entry->func, __entry->depth,
+	F_printk("--> %ps (%u) <- %ps", (void *)__entry->func, __entry->depth,
 		(void *)__entry->retaddr)
 );
 
@@ -124,13 +124,13 @@ FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry,
 		__field_struct(	struct ftrace_graph_ret,	ret	)
 		__field_packed(	unsigned long,	ret,		func	)
 		__field_packed(	unsigned long,	ret,		retval	)
-		__field_packed(	int,		ret,		depth	)
+		__field_packed(	unsigned int,	ret,		depth	)
 		__field_packed(	unsigned int,	ret,		overrun	)
 		__field(unsigned long long,	calltime		)
 		__field(unsigned long long,	rettime			)
 	),
 
-	F_printk("<-- %ps (%d) (start: %llx  end: %llx) over: %d retval: %lx",
+	F_printk("<-- %ps (%u) (start: %llx  end: %llx) over: %u retval: %lx",
 		 (void *)__entry->func, __entry->depth,
 		 __entry->calltime, __entry->rettime,
 		 __entry->depth, __entry->retval)
@@ -146,13 +146,13 @@ FTRACE_ENTRY_PACKED(funcgraph_exit, ftrace_graph_ret_entry,
 	F_STRUCT(
 		__field_struct(	struct ftrace_graph_ret,	ret	)
 		__field_packed(	unsigned long,	ret,		func	)
-		__field_packed(	int,		ret,		depth	)
+		__field_packed(	unsigned int,	ret,		depth	)
 		__field_packed(	unsigned int,	ret,		overrun	)
 		__field(unsigned long long,	calltime		)
 		__field(unsigned long long,	rettime			)
 	),
 
-	F_printk("<-- %ps (%d) (start: %llx  end: %llx) over: %d",
+	F_printk("<-- %ps (%u) (start: %llx  end: %llx) over: %u",
 		 (void *)__entry->func, __entry->depth,
 		 __entry->calltime, __entry->rettime,
 		 __entry->depth)