From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
Date: Thu, 12 Oct 2017 18:06:19 -0400
Subject: [PATCH] x86/fpu/debug: Remove unused 'x86_fpu_state' and
 'x86_fpu_deactivate_state' tracepoints
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CVE-2017-5754

Commit:

  d1898b733619 ("x86/fpu: Add tracepoints to dump FPU state at key points")

... added the 'x86_fpu_state' and 'x86_fpu_deactivate_state' trace points,
but never used them. Today they are still not used. As they take up
and waste memory, remove them.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20171012180619.670b68b6@gandalf.local.home
Signed-off-by: Ingo Molnar <mingo@kernel.org>
(cherry picked from commit 127a1bea40f7f2a36bc7207ea4d51bb6b4e936fa)
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
(cherry picked from commit c7c367ddb6ffb6af2cfee287960e97c4aefc6548)
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
---
 arch/x86/include/asm/trace/fpu.h | 10 ----------
 1 file changed, 10 deletions(-)

diff --git a/arch/x86/include/asm/trace/fpu.h b/arch/x86/include/asm/trace/fpu.h
index 342e59789fcd..fed7d9ecae60 100644
--- a/arch/x86/include/asm/trace/fpu.h
+++ b/arch/x86/include/asm/trace/fpu.h
@@ -36,11 +36,6 @@ DECLARE_EVENT_CLASS(x86_fpu,
 	)
 );
 
-DEFINE_EVENT(x86_fpu, x86_fpu_state,
-	TP_PROTO(struct fpu *fpu),
-	TP_ARGS(fpu)
-);
-
 DEFINE_EVENT(x86_fpu, x86_fpu_before_save,
 	TP_PROTO(struct fpu *fpu),
 	TP_ARGS(fpu)
@@ -76,11 +71,6 @@ DEFINE_EVENT(x86_fpu, x86_fpu_activate_state,
 	TP_ARGS(fpu)
 );
 
-DEFINE_EVENT(x86_fpu, x86_fpu_deactivate_state,
-	TP_PROTO(struct fpu *fpu),
-	TP_ARGS(fpu)
-);
-
 DEFINE_EVENT(x86_fpu, x86_fpu_init_state,
 	TP_PROTO(struct fpu *fpu),
 	TP_ARGS(fpu)
-- 
2.14.2

