[PATCH v2 04/13] m68k: select CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS

From: Arnd Bergmann <arnd@kernel.org>
To: linux-arch@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Vineet Gupta <vgupta@synopsys.com>, Arnd Bergmann <arnd@arndb.de>,
	Geert Uytterhoeven <geert@linux-m68k.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 04/13] m68k: select CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS
Date: Fri, 14 May 2021 12:00:52 +0200	[thread overview]
Message-ID: <20210514100106.3404011-5-arnd@kernel.org> (raw)
In-Reply-To: <20210514100106.3404011-1-arnd@kernel.org>

From: Arnd Bergmann <arnd@arndb.de>

All supported CPUs other than the old dragonball and in theory other 68000
derivatives use the include/linux/unaligned/access_ok.h implementation
for accessing unaligned variables, so presumably this works everywhere.

However, m68k never selects CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS,
so none of the other conditionals in the kernel get the optimized
implementation.

Select this based on CPU_HAS_NO_UNALIGNED to make the two settings
always match, and then use the generic version of the header.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 arch/m68k/Kconfig                 |  1 +
 arch/m68k/include/asm/unaligned.h | 19 -------------------
 2 files changed, 1 insertion(+), 19 deletions(-)
 delete mode 100644 arch/m68k/include/asm/unaligned.h

diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 372e4e69c43a..46089f3b9603 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -21,6 +21,7 @@ config M68K
 	select HAVE_AOUT if MMU
 	select HAVE_ASM_MODVERSIONS
 	select HAVE_DEBUG_BUGVERBOSE
+	select HAVE_EFFICIENT_UNALIGNED_ACCESS if !CPU_HAS_NO_UNALIGNED
 	select HAVE_FUTEX_CMPXCHG if MMU && FUTEX
 	select HAVE_IDE
 	select HAVE_MOD_ARCH_SPECIFIC
diff --git a/arch/m68k/include/asm/unaligned.h b/arch/m68k/include/asm/unaligned.h
deleted file mode 100644
index 84e437337344..000000000000
--- a/arch/m68k/include/asm/unaligned.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_M68K_UNALIGNED_H
-#define _ASM_M68K_UNALIGNED_H
-
-#ifdef CONFIG_CPU_HAS_NO_UNALIGNED
-#include <asm-generic/unaligned.h>
-#else
-/*
- * The m68k can do unaligned accesses itself.
- */
-#include <linux/unaligned/access_ok.h>
-#include <linux/unaligned/generic.h>
-
-#define get_unaligned	__get_unaligned_be
-#define put_unaligned	__put_unaligned_be
-
-#endif
-
-#endif /* _ASM_M68K_UNALIGNED_H */
-- 
2.29.2

