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| author | Thomas Weißschuh <thomas.weissschuh@linutronix.de> | 2026-01-14 08:28:13 +0100 |
|---|---|---|
| committer | Arnd Bergmann <arnd@arndb.de> | 2026-01-30 16:46:17 +0100 |
| commit | b4171fd0b091072f403b66bf05d01051d4bd94d9 (patch) | |
| tree | 8f1879b05b4fb316d08015d04d7cbe3b7b56add1 /arch/arc/Makefile | |
| parent | eed444d02585b426645532166ede3e2427db901d (diff) | |
| download | lwn-b4171fd0b091072f403b66bf05d01051d4bd94d9.tar.gz lwn-b4171fd0b091072f403b66bf05d01051d4bd94d9.zip | |
ARC: Always use SWAPE instructions for __arch_swab32()
Since commit 67a697e7576 ("ARC: retire ARC750 support") all supported
CPUs have the 'swape' instruction.
Always use the implementation of __arch_swabe() which uses 'swape'.
ARCH_USE_BUILTIN_BSWAP can not be used as that results on libcalls on
-mcpu=arc700.
As as side-effect, remove a leak of an internal kconfig symbol through
the UAPI headers.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/lkml/0ae2688a-5a22-405b-adaf-9b5ad712b245@app.fastmail.com/
Suggested-by: Vineet Gupta <vgupta@kernel.org>
Link: https://lore.kernel.org/lkml/a033a402-e3c5-4982-9fff-b6a4c55817ae@kernel.org/
Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'arch/arc/Makefile')
| -rw-r--r-- | arch/arc/Makefile | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/arc/Makefile b/arch/arc/Makefile index 0c5e6e6314f2..868805ffcfea 100644 --- a/arch/arc/Makefile +++ b/arch/arc/Makefile @@ -9,7 +9,7 @@ ifeq ($(CROSS_COMPILE),) CROSS_COMPILE := $(call cc-cross-prefix, arc-linux- arceb-linux- arc-linux-gnu-) endif -cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -D__linux__ +cflags-y += -fno-common -pipe -fno-builtin -mmedium-calls -mswape -D__linux__ tune-mcpu-def-$(CONFIG_ISA_ARCOMPACT) := -mcpu=arc700 tune-mcpu-def-$(CONFIG_ISA_ARCV2) := -mcpu=hs38 @@ -41,7 +41,6 @@ endif cflags-y += -fsection-anchors cflags-$(CONFIG_ARC_HAS_LLSC) += -mlock -cflags-$(CONFIG_ARC_HAS_SWAPE) += -mswape ifdef CONFIG_ISA_ARCV2 |