linux-kernel - [PATCH 8/8] riscv: Use latest system call ABI

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Message-Id: <20190218210712.3503891-9-arnd@arndb.de>
Date:   Mon, 18 Feb 2019 22:07:12 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     y2038@...ts.linaro.org
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-arch@...r.kernel.org,
        linux-api@...r.kernel.org, linux-kernel@...r.kernel.org,
        yury.norov@...il.com, linux-arm-kernel@...ts.infradead.org,
        linux-hexagon@...r.kernel.org,
        uclinux-h8-devel@...ts.sourceforge.jp,
        Stafford Horne <shorne@...il.com>,
        Vineet Gupta <vgupta@...opsys.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Guo Ren <guoren@...nel.org>, Greentime Hu <green.hu@...il.com>,
        arnd@...db.de, linux-riscv@...ts.infradead.org,
        Guan Xuetao <gxt@....edu.cn>
Subject: [PATCH 8/8] riscv: Use latest system call ABI

We don't yet have an upstream glibc port for riscv, so there is no user
space for the existing ABI, and we can remove the definitions for 32-bit
time_t, off_t and struct resource and system calls based on them,
including the vdso.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/riscv/Kconfig                   | 1 -
 arch/riscv/include/uapi/asm/unistd.h | 5 +----
 arch/riscv/kernel/vdso/Makefile      | 2 ++
 3 files changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 09fa3a87bf30..feeeaa60697c 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -11,7 +11,6 @@ config 32BIT
 
 config RISCV
 	def_bool y
-	select ARCH_32BIT_OFF_T if !64BIT
 	# even on 32-bit, physical (and DMA) addresses are > 32-bits
 	select PHYS_ADDR_T_64BIT
 	select OF
diff --git a/arch/riscv/include/uapi/asm/unistd.h b/arch/riscv/include/uapi/asm/unistd.h
index 486a288b454c..0e2eeeb1fd27 100644
--- a/arch/riscv/include/uapi/asm/unistd.h
+++ b/arch/riscv/include/uapi/asm/unistd.h
@@ -17,11 +17,8 @@
 
 #ifdef __LP64__
 #define __ARCH_WANT_NEW_STAT
-#endif /* __LP64__ */
 #define __ARCH_WANT_SET_GET_RLIMIT
-#ifndef __LP64__
-#define __ARCH_WANT_TIME32_SYSCALLS
-#endif
+#endif /* __LP64__ */
 
 #include <asm-generic/unistd.h>
 
diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
index eed1c137f618..fec62b24df89 100644
--- a/arch/riscv/kernel/vdso/Makefile
+++ b/arch/riscv/kernel/vdso/Makefile
@@ -2,9 +2,11 @@
 
 # Symbols present in the vdso
 vdso-syms  = rt_sigreturn
+ifdef CONFIG_64BIT
 vdso-syms += gettimeofday
 vdso-syms += clock_gettime
 vdso-syms += clock_getres
+endif
 vdso-syms += getcpu
 vdso-syms += flush_icache
 
-- 
2.20.0