linux-kernel - [PATCH] arm64/mm: Drop unused restore

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Date:   Thu, 17 Nov 2022 18:01:44 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-arm-kernel@...ts.infradead.org
Cc:     Anshuman Khandual <anshuman.khandual@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] arm64/mm: Drop unused restore_ttbr1

restore_ttbr1 procedure is not used anywhere, hence just drop it.

Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
This applies on v6.1-rc5

 arch/arm64/include/asm/assembler.h | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index e5957a53be39..f13bc52ab347 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -619,17 +619,6 @@ alternative_endif
 #endif
 	.endm
 
-/*
- * Perform the reverse of offset_ttbr1.
- * bic is used as it can cover the immediate value and, in future, won't need
- * to be nop'ed out when dealing with 52-bit kernel VAs.
- */
-	.macro	restore_ttbr1, ttbr
-#ifdef CONFIG_ARM64_VA_BITS_52
-	bic	\ttbr, \ttbr, #TTBR1_BADDR_4852_OFFSET
-#endif
-	.endm
-
 /*
  * Arrange a physical address in a TTBR register, taking care of 52-bit
  * addresses.
-- 
2.25.1