2018-01-15 14:26:15 +03:00
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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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2018-01-08 12:25:09 +03:00
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From: David Woodhouse <dwmw@amazon.co.uk>
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Date: Thu, 4 Jan 2018 14:37:05 +0000
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2018-01-15 14:26:15 +03:00
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Subject: [PATCH] x86/alternatives: Add missing '\n' at end of ALTERNATIVE
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inline asm
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2018-01-08 12:25:09 +03:00
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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commit b9e705ef7cfaf22db0daab91ad3cd33b0fa32eb9 upstream.
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Where an ALTERNATIVE is used in the middle of an inline asm block, this
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would otherwise lead to the following instruction being appended directly
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to the trailing ".popsection", and a failed compile.
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Fixes: 9cebed423c84 ("x86, alternative: Use .pushsection/.popsection")
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Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
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Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Cc: gnomes@lxorguk.ukuu.org.uk
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Cc: Rik van Riel <riel@redhat.com>
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Cc: ak@linux.intel.com
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Cc: Tim Chen <tim.c.chen@linux.intel.com>
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Cc: Peter Zijlstra <peterz@infradead.org>
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Cc: Paul Turner <pjt@google.com>
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Cc: Jiri Kosina <jikos@kernel.org>
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Cc: Andy Lutomirski <luto@amacapital.net>
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Cc: Dave Hansen <dave.hansen@intel.com>
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Cc: Kees Cook <keescook@google.com>
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Cc: Linus Torvalds <torvalds@linux-foundation.org>
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Cc: Greg Kroah-Hartman <gregkh@linux-foundation.org>
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Link: https://lkml.kernel.org/r/20180104143710.8961-8-dwmw@amazon.co.uk
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Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
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---
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arch/x86/include/asm/alternative.h | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h
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index d4aea31eec03..deca9b9c7923 100644
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--- a/arch/x86/include/asm/alternative.h
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+++ b/arch/x86/include/asm/alternative.h
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@@ -139,7 +139,7 @@ static inline int alternatives_text_reserved(void *start, void *end)
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".popsection\n" \
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".pushsection .altinstr_replacement, \"ax\"\n" \
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ALTINSTR_REPLACEMENT(newinstr, feature, 1) \
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- ".popsection"
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+ ".popsection\n"
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#define ALTERNATIVE_2(oldinstr, newinstr1, feature1, newinstr2, feature2)\
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OLDINSTR_2(oldinstr, 1, 2) \
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@@ -150,7 +150,7 @@ static inline int alternatives_text_reserved(void *start, void *end)
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".pushsection .altinstr_replacement, \"ax\"\n" \
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ALTINSTR_REPLACEMENT(newinstr1, feature1, 1) \
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ALTINSTR_REPLACEMENT(newinstr2, feature2, 2) \
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- ".popsection"
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+ ".popsection\n"
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/*
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* Alternative instructions for different CPU types or capabilities.
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--
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2.14.2
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