[PATCH] riscv: kbuild: drop CONFIG_RISCV_ISA_C

From: Paul Walmsley <paul.walmsley@sifive.com>
To: linux-riscv@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, atish.patra@wdc.com
Subject: [PATCH] riscv: kbuild: drop CONFIG_RISCV_ISA_C
Date: Tue, 6 Aug 2019 19:30:24 -0700 (PDT)	[thread overview]
Message-ID: <alpine.DEB.2.21.9999.1908061929230.19468@viisi.sifive.com> (raw)


The baseline ISA support requirement for the RISC-V Linux kernel
mandates compressed instructions, so it doesn't make sense for
compressed instruction support to be configurable.

Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Atish Patra <atish.patra@wdc.com>

---
 arch/riscv/Kconfig  | 10 ----------
 arch/riscv/Makefile |  2 +-
 2 files changed, 1 insertion(+), 11 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 59a4727ecd6c..8c5b9329ec46 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -197,16 +197,6 @@ config TUNE_GENERIC
 
 endchoice
 
-config RISCV_ISA_C
-	bool "Emit compressed instructions when building Linux"
-	default y
-	help
-	   Adds "C" to the ISA subsets that the toolchain is allowed to emit
-	   when building Linux, which results in compressed instructions in the
-	   Linux binary.
-
-	   If you don't know what to do here, say Y.
-
 menu "supported PMU type"
 	depends on PERF_EVENTS
 
diff --git a/arch/riscv/Makefile b/arch/riscv/Makefile
index 7a117be8297c..e23e066c55e2 100644
--- a/arch/riscv/Makefile
+++ b/arch/riscv/Makefile
@@ -38,7 +38,7 @@ endif
 riscv-march-$(CONFIG_ARCH_RV32I)	:= rv32ima
 riscv-march-$(CONFIG_ARCH_RV64I)	:= rv64ima
 riscv-march-$(CONFIG_FPU)		:= $(riscv-march-y)fd
-riscv-march-$(CONFIG_RISCV_ISA_C)	:= $(riscv-march-y)c
+riscv-march-y				:= $(riscv-march-y)c
 KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))
 KBUILD_AFLAGS += -march=$(riscv-march-y)
 
-- 
2.22.0

