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[3.19.y-ckt,stable] Patch "x86/asm/entry/64: Remove a redundant jump" has been added to staging queue

Message ID 1438290265-28549-1-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa July 30, 2015, 9:04 p.m. UTC
This is a note to let you know that I have just added a patch titled

    x86/asm/entry/64: Remove a redundant jump

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.y-ckt5.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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From f0dc9f756308e8cb8585fdd0065df26b0e8b5201 Mon Sep 17 00:00:00 2001
From: Denys Vlasenko <dvlasenk@redhat.com>
Date: Tue, 7 Apr 2015 22:43:41 +0200
Subject: x86/asm/entry/64: Remove a redundant jump

commit a30b0085f54efae11f6256df4e4a16af7eefc1c4 upstream.

Jumping to the very next instruction is not very useful:

        jmp label
    label:

Removing the jump.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1428439424-7258-5-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Acked-by: John Johansen <john.johansen@canonical.com>
Acked-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
---
 arch/x86/kernel/entry_64.S | 1 -
 1 file changed, 1 deletion(-)

--
1.9.1
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Patch

diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index f02ba29..315f8e9 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -1509,7 +1509,6 @@  ENTRY(nmi)
 	/* If it is below the NMI stack, it is a normal NMI */
 	jb	first_nmi
 	/* Ah, it is within the NMI stack, treat it as nested */
-	jmp	nested_nmi

 	CFI_REMEMBER_STATE