From: Denys Vlasenko <dvlasenk@redhat.com>
To: Andy Lutomirski <luto@amacapital.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@kernel.org>,
        Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
        Oleg Nesterov <oleg@redhat.com>,
        Frederic Weisbecker <fweisbec@gmail.com>,
        Alexei Starovoitov <ast@plumgrid.com>, Will Drewry <wad@chromium.org>,
        Kees Cook <keescook@chromium.org>, x86@kernel.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH 4/7] x86: entry.S: use JZ mnemonic after TEST, not JE
Date: Wed, 25 Feb 2015 01:00:16 +0100
Message-Id: <1424822419-10267-4-git-send-email-dvlasenk@redhat.com>
In-Reply-To: <1424822419-10267-1-git-send-email-dvlasenk@redhat.com>
References: <1424822419-10267-1-git-send-email-dvlasenk@redhat.com>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1350
Lines: 44

After TEST insn, JE actually performs "jump if zero",
let's use JZ mnemonic instead.

No code changes, but less confusion.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
CC: Linus Torvalds <torvalds@linux-foundation.org>
CC: Steven Rostedt <rostedt@goodmis.org>
CC: Ingo Molnar <mingo@kernel.org>
CC: Borislav Petkov <bp@alien8.de>
CC: "H. Peter Anvin" <hpa@zytor.com>
CC: Andy Lutomirski <luto@amacapital.net>
CC: Oleg Nesterov <oleg@redhat.com>
CC: Frederic Weisbecker <fweisbec@gmail.com>
CC: Alexei Starovoitov <ast@plumgrid.com>
CC: Will Drewry <wad@chromium.org>
CC: Kees Cook <keescook@chromium.org>
CC: x86@kernel.org
CC: linux-kernel@vger.kernel.org
---
 arch/x86/kernel/entry_64.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 779ae21..99e3abc 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -686,7 +686,7 @@ ret_from_intr:
 exit_intr:
 	GET_THREAD_INFO(%rcx)
 	testl $3,CS(%rsp)
-	je retint_kernel
+	jz retint_kernel
 
 	/* Interrupt came from user space */
 	/*
-- 
1.8.1.4

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