linux-kernel - [PATCH 4.19 05/50] x86, modpost: Replace last remnants of RETPOLINE with CONFIG

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Date:   Tue, 15 Jan 2019 17:35:41 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, WANG Chao <chao.wang@...oud.cn>,
        Borislav Petkov <bp@...e.de>,
        Zhenzhong Duan <zhenzhong.duan@...cle.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        "H. Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andy Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Daniel Borkmann <daniel@...earbox.net>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Jessica Yu <jeyu@...nel.org>, Jiri Kosina <jkosina@...e.cz>,
        Kees Cook <keescook@...omium.org>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Luc Van Oostenryck <luc.vanoostenryck@...il.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        linux-kbuild@...r.kernel.org, srinivas.eeda@...cle.com,
        x86-ml <x86@...nel.org>
Subject: [PATCH 4.19 05/50] x86, modpost: Replace last remnants of RETPOLINE with CONFIG_RETPOLINE

4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: WANG Chao <chao.wang@...oud.cn>

commit e4f358916d528d479c3c12bd2fd03f2d5a576380 upstream.

Commit

  4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support")

replaced the RETPOLINE define with CONFIG_RETPOLINE checks. Remove the
remaining pieces.

 [ bp: Massage commit message. ]

Fixes: 4cd24de3a098 ("x86/retpoline: Make CONFIG_RETPOLINE depend on compiler support")
Signed-off-by: WANG Chao <chao.wang@...oud.cn>
Signed-off-by: Borislav Petkov <bp@...e.de>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@...cle.com>
Reviewed-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Daniel Borkmann <daniel@...earbox.net>
Cc: David Woodhouse <dwmw@...zon.co.uk>
Cc: Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: Jessica Yu <jeyu@...nel.org>
Cc: Jiri Kosina <jkosina@...e.cz>
Cc: Kees Cook <keescook@...omium.org>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Cc: Luc Van Oostenryck <luc.vanoostenryck@...il.com>
Cc: Michal Marek <michal.lkml@...kovi.net>
Cc: Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Tim Chen <tim.c.chen@...ux.intel.com>
Cc: Vasily Gorbik <gor@...ux.ibm.com>
Cc: linux-kbuild@...r.kernel.org
Cc: srinivas.eeda@...cle.com
Cc: stable <stable@...r.kernel.org>
Cc: x86-ml <x86@...nel.org>
Link: https://lkml.kernel.org/r/20181210163725.95977-1-chao.wang@ucloud.cn
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kernel/cpu/bugs.c   |    2 +-
 include/linux/compiler-gcc.h |    2 +-
 include/linux/module.h       |    2 +-
 scripts/mod/modpost.c        |    2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -213,7 +213,7 @@ static enum spectre_v2_mitigation spectr
 static enum spectre_v2_user_mitigation spectre_v2_user __ro_after_init =
 	SPECTRE_V2_USER_NONE;

-#ifdef RETPOLINE
+#ifdef CONFIG_RETPOLINE
 static bool spectre_v2_bad_module;

 bool retpoline_module_ok(bool has_retpoline)
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -75,7 +75,7 @@
 #define __must_be_array(a)	BUILD_BUG_ON_ZERO(__same_type((a), &(a)[0]))
 #endif

-#ifdef RETPOLINE
+#ifdef CONFIG_RETPOLINE
 #define __noretpoline __attribute__((indirect_branch("keep")))
 #endif

--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -818,7 +818,7 @@ static inline void module_bug_finalize(c
 static inline void module_bug_cleanup(struct module *mod) {}
 #endif	/* CONFIG_GENERIC_BUG */

-#ifdef RETPOLINE
+#ifdef CONFIG_RETPOLINE
 extern bool retpoline_module_ok(bool has_retpoline);
 #else
 static inline bool retpoline_module_ok(bool has_retpoline)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -2157,7 +2157,7 @@ static void add_intree_flag(struct buffe
 /* Cannot check for assembler */
 static void add_retpoline(struct buffer *b)
 {
-	buf_printf(b, "\n#ifdef RETPOLINE\n");
+	buf_printf(b, "\n#ifdef CONFIG_RETPOLINE\n");
 	buf_printf(b, "MODULE_INFO(retpoline, \"Y\");\n");
 	buf_printf(b, "#endif\n");
 }