linux-kernel - [PATCH v2 16/16] objtool: Warn about unknown annotation types

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Message-ID: <20241128094312.611961175@infradead.org>
Date: Thu, 28 Nov 2024 10:39:07 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: jpoimboe@...nel.org
Cc: chenhuacai@...nel.org,
 kernel@...0n.name,
 x86@...nel.org,
 peterz@...radead.org,
 loongarch@...ts.linux.dev,
 linux-kernel@...r.kernel.org
Subject: [PATCH v2 16/16] objtool: Warn about unknown annotation types


Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
---
 tools/objtool/check.c |   13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -2335,6 +2335,10 @@ static int __annotate_ifc(struct objtool
 static int __annotate_late(struct objtool_file *file, int type, struct instruction *insn)
 {
 	switch (type) {
+	case ANNOTYPE_NOENDBR:
+		/* early */
+		break;
+
 	case ANNOTYPE_RETPOLINE_SAFE:
 		if (insn->type != INSN_JUMP_DYNAMIC &&
 		    insn->type != INSN_CALL_DYNAMIC &&
@@ -2359,11 +2363,20 @@ static int __annotate_late(struct objtoo
 		insn->unret = 1;
 		break;
 
+	case ANNOTYPE_IGNORE_ALTS:
+		/* early */
+		break;
+
+	case ANNOTYPE_INTRA_FUNCTION_CALL:
+		/* ifc */
+		break;
+
 	case ANNOTYPE_REACHABLE:
 		insn->dead_end = false;
 		break;
 
 	default:
+		WARN_INSN(insn, "Unknown annotation type: %d", type);
 		break;
 	}