linux-kernel - [RFC 10/10] Revert "ftrace: Store direct called addresses in their ops"

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Message-ID: <20250729102813.1531457-11-jolsa@kernel.org>
Date: Tue, 29 Jul 2025 12:28:13 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: Steven Rostedt <rostedt@...nel.org>,
	Florent Revest <revest@...gle.com>,
	Mark Rutland <mark.rutland@....com>
Cc: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-trace-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Andrii Nakryiko <andrii@...nel.org>,
	Menglong Dong <menglong8.dong@...il.com>
Subject: [RFC 10/10] Revert "ftrace: Store direct called addresses in their ops"

This reverts commit dbaccb618fabde8b8596e341f8d76da63a9b0c2f.

Current code uses ip address to lookup the trampoline and we need the
ops to point multiple trampolines, hence this is no longer needed.

TODO this probably breaks arm.

Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 include/linux/ftrace.h | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 1a61f969550d..27b26a87231c 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -457,9 +457,6 @@ struct ftrace_ops {
 	struct list_head		subop_list;
 	ftrace_ops_func_t		ops_func;
 	struct ftrace_ops		*managed;
-#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
-	unsigned long			direct_call;
-#endif
 #endif
 };
 
-- 
2.50.1