diff options
| author | Palmer Dabbelt <palmer@dabbelt.com> | 2017-12-26 19:11:22 -0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@dabbelt.com> | 2018-01-07 15:14:37 -0800 |
| commit | 9e49a4ed072ab67b17238c5a45d7cba7f848659e (patch) | |
| tree | 16006725ba7697d6fa4fcecd0954e7e646b46216 /arch/riscv/include/asm | |
| parent | 33c57c0d3c67f51f491a9d27108f7e97adc03d96 (diff) | |
| download | linux-stable-9e49a4ed072ab67b17238c5a45d7cba7f848659e.tar.gz linux-stable-9e49a4ed072ab67b17238c5a45d7cba7f848659e.tar.bz2 linux-stable-9e49a4ed072ab67b17238c5a45d7cba7f848659e.zip | |
RISC-V: Make __NR_riscv_flush_icache visible to userspace
We were hoping to avoid making this visible to userspace, but it looks
like we're going to have to because QEMU's user-mode emulation doesn't
want to emulate a vDSO. Having vDSO-only system calls was a bit
unothodox anyway, so I think in this case it's OK to just make the
actual system call number public.
This patch simply moves the definition of __NR_riscv_flush_icache
availiable to userspace, which results in the deletion of the now empty
vdso-syscalls.h.
Changes since v1:
* I've moved the definition into uapi/asm/syscalls.h rathen than
uapi/asm/unistd.h. This allows me to keep asm/unistd.h, so we can
keep the syscall table macros sane.
* As a side effect of the above, this no longer disables all system
calls on RISC-V. Whoops!
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/unistd.h | 1 | ||||
| -rw-r--r-- | arch/riscv/include/asm/vdso-syscalls.h | 28 |
2 files changed, 1 insertions, 28 deletions
diff --git a/arch/riscv/include/asm/unistd.h b/arch/riscv/include/asm/unistd.h index 9f250ed007cd..2f704a5c4196 100644 --- a/arch/riscv/include/asm/unistd.h +++ b/arch/riscv/include/asm/unistd.h @@ -14,3 +14,4 @@ #define __ARCH_HAVE_MMU #define __ARCH_WANT_SYS_CLONE #include <uapi/asm/unistd.h> +#include <uapi/asm/syscalls.h> diff --git a/arch/riscv/include/asm/vdso-syscalls.h b/arch/riscv/include/asm/vdso-syscalls.h deleted file mode 100644 index a2ccf1894929..000000000000 --- a/arch/riscv/include/asm/vdso-syscalls.h +++ /dev/null @@ -1,28 +0,0 @@ -/* - * Copyright (C) 2017 SiFive - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#ifndef _ASM_RISCV_VDSO_SYSCALLS_H -#define _ASM_RISCV_VDSO_SYSCALLS_H - -#ifdef CONFIG_SMP - -/* These syscalls are only used by the vDSO and are not in the uapi. */ -#define __NR_riscv_flush_icache (__NR_arch_specific_syscall + 15) -__SYSCALL(__NR_riscv_flush_icache, sys_riscv_flush_icache) - -#endif - -#endif /* _ASM_RISCV_VDSO_H */ |