From: Anthony Steinhauser <asteinhauser@google.com>
Date: Thu, 26 Dec 2019 20:45:12 +0000 (-0800)
Subject: x86/nospec: Remove unused RSB_FILL_LOOPS
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=fae7bfcc78146057ac2730719de8d5e41de19540;p=linux.git

x86/nospec: Remove unused RSB_FILL_LOOPS

It was never really used, see

  117cc7a908c8 ("x86/retpoline: Fill return stack buffer on vmexit")

  [ bp: Massage. ]

Signed-off-by: Anthony Steinhauser <asteinhauser@google.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20191226204512.24524-1-asteinhauser@google.com
---

diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 5c24a7b351665..07e95dcb40ad5 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -37,7 +37,6 @@
  */
 
 #define RSB_CLEAR_LOOPS		32	/* To forcibly overwrite all entries */
-#define RSB_FILL_LOOPS		16	/* To avoid underflow */
 
 /*
  * Google experimented with loop-unrolling and this turned out to be