linux-kernel - [PATCH] x86: delete UD0, UD1 traces

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Date:   Thu, 22 Apr 2021 21:58:40 +0300
From:   Alexey Dobriyan <adobriyan@...il.com>
To:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de
Cc:     x86@...nel.org, hpa@...or.com, linux-kernel@...r.kernel.org
Subject: [PATCH] x86: delete UD0, UD1 traces

Both instructions aren't used by kernel.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 arch/x86/include/asm/bug.h |    9 ---------
 1 file changed, 9 deletions(-)

--- a/arch/x86/include/asm/bug.h
+++ b/arch/x86/include/asm/bug.h
@@ -7,18 +7,9 @@
 
 /*
  * Despite that some emulators terminate on UD2, we use it for WARN().
- *
- * Since various instruction decoders/specs disagree on the encoding of
- * UD0/UD1.
  */
-
-#define ASM_UD0		".byte 0x0f, 0xff" /* + ModRM (for Intel) */
-#define ASM_UD1		".byte 0x0f, 0xb9" /* + ModRM */
 #define ASM_UD2		".byte 0x0f, 0x0b"
-
-#define INSN_UD0	0xff0f
 #define INSN_UD2	0x0b0f
-
 #define LEN_UD2		2
 
 #ifdef CONFIG_GENERIC_BUG