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riscv: remove CONFIG_RISCV_ISA_A 

This option is always enabled, and not supporting the A extensions would
create a complete ABI trainwreck, so there is no point in even slightly
encouraging such an idea by keeping this unselectable code around.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
This commit is contained in:
Christoph Hellwig 2019-04-15 11:14:35 +02:00 committed by Palmer Dabbelt
parent e28dcc77e8
commit 09afac77b6
No known key found for this signature in database
GPG Key ID: EF4CA1502CCBAB41
3 changed files with 3 additions and 21 deletions
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6
arch/riscv/Kconfig
View File

@ -27,7 +27,7 @@ config RISCV
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select GENERIC_SMP_IDLE_THREAD
select GENERIC_ATOMIC64 if !64BIT || !RISCV_ISA_A
select GENERIC_ATOMIC64 if !64BIT
select HAVE_ARCH_AUDITSYSCALL
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_DMA_CONTIGUOUS
@ -35,7 +35,6 @@ config RISCV
select HAVE_PERF_EVENTS
select HAVE_SYSCALL_TRACEPOINTS
select IRQ_DOMAIN
select RISCV_ISA_A if SMP
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
select HAVE_ARCH_TRACEHOOK
@ -197,9 +196,6 @@ config RISCV_ISA_C
If you don't know what to do here, say Y.
config RISCV_ISA_A
def_bool y
menu "supported PMU type"
depends on PERF_EVENTS

5
arch/riscv/Makefile
View File

@ -39,9 +39,8 @@ endif
KBUILD_CFLAGS += -Wall
# ISA string setting
riscv-march-$(CONFIG_ARCH_RV32I) := rv32im
riscv-march-$(CONFIG_ARCH_RV64I) := rv64im
riscv-march-$(CONFIG_RISCV_ISA_A) := $(riscv-march-y)a
riscv-march-$(CONFIG_ARCH_RV32I) := rv32ima
riscv-march-$(CONFIG_ARCH_RV64I) := rv64ima
riscv-march-$(CONFIG_FPU) := $(riscv-march-y)fd
riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
KBUILD_CFLAGS += -march=$(subst fd,,$(riscv-march-y))

13
arch/riscv/include/asm/futex.h
View File

@ -7,18 +7,6 @@
#ifndef _ASM_FUTEX_H
#define _ASM_FUTEX_H
#ifndef CONFIG_RISCV_ISA_A
/*
* Use the generic interrupt disabling versions if the A extension
* is not supported.
*/
#ifdef CONFIG_SMP
#error "Can't support generic futex calls without A extension on SMP"
#endif
#include <asm-generic/futex.h>
#else /* CONFIG_RISCV_ISA_A */
#include <linux/futex.h>
#include <linux/uaccess.h>
#include <linux/errno.h>
@ -124,5 +112,4 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr,
return ret;
}
#endif /* CONFIG_RISCV_ISA_A */
#endif /* _ASM_FUTEX_H */