linux-kernel - [PATCH 14/17] loongarch: convert to generic syscall table

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Message-Id: <20240704143611.2979589-15-arnd@kernel.org>
Date: Thu,  4 Jul 2024 16:36:08 +0200
From: Arnd Bergmann <arnd@...nel.org>
To: linux-arch@...r.kernel.org
Cc: Arnd Bergmann <arnd@...db.de>,
	Masahiro Yamada <masahiroy@...nel.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Nicolas Schier <nicolas@...sle.eu>,
	Vineet Gupta <vgupta@...nel.org>,
	Russell King <linux@...linux.org.uk>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Guo Ren <guoren@...nel.org>,
	Brian Cain <bcain@...cinc.com>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>,
	Dinh Nguyen <dinguyen@...nel.org>,
	Jonas Bonn <jonas@...thpole.se>,
	Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
	Stafford Horne <shorne@...il.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Rich Felker <dalias@...c.org>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	"David S. Miller" <davem@...emloft.net>,
	Andreas Larsson <andreas@...sler.com>,
	Christian Brauner <brauner@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-snps-arc@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-csky@...r.kernel.org,
	linux-hexagon@...r.kernel.org,
	loongarch@...ts.linux.dev,
	linux-openrisc@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: [PATCH 14/17] loongarch: convert to generic syscall table

From: Arnd Bergmann <arnd@...db.de>

The uapi/asm/unistd_64.h and asm/syscall_table_64.h headers can now be
generated from scripts/syscall.tbl, which makes this consistent with
the other architectures that have their own syscall.tbl.

Unlike the other architectures using the asm-generic header, loongarch
uses none of the deprecated system calls at the moment.

Both the user visible side of asm/unistd.h and the internal syscall
table in the kernel should have the same effective contents after this.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 arch/loongarch/include/asm/Kbuild        | 1 +
 arch/loongarch/include/asm/unistd.h      | 2 ++
 arch/loongarch/include/uapi/asm/Kbuild   | 2 ++
 arch/loongarch/include/uapi/asm/unistd.h | 3 +--
 arch/loongarch/kernel/Makefile.syscalls  | 4 ++++
 arch/loongarch/kernel/syscall.c          | 3 ++-
 6 files changed, 12 insertions(+), 3 deletions(-)
 create mode 100644 arch/loongarch/kernel/Makefile.syscalls

diff --git a/arch/loongarch/include/asm/Kbuild b/arch/loongarch/include/asm/Kbuild
index 0db5ad14f014..2bb3676429c0 100644
--- a/arch/loongarch/include/asm/Kbuild
+++ b/arch/loongarch/include/asm/Kbuild
@@ -1,4 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
+syscall-y += syscall_table_64.h
 generated-y += orc_hash.h
 
 generic-y += mcs_spinlock.h
diff --git a/arch/loongarch/include/asm/unistd.h b/arch/loongarch/include/asm/unistd.h
index cfddb0116a8c..fc0a481a7416 100644
--- a/arch/loongarch/include/asm/unistd.h
+++ b/arch/loongarch/include/asm/unistd.h
@@ -8,4 +8,6 @@
 
 #include <uapi/asm/unistd.h>
 
+#define __ARCH_WANT_SYS_CLONE
+
 #define NR_syscalls (__NR_syscalls)
diff --git a/arch/loongarch/include/uapi/asm/Kbuild b/arch/loongarch/include/uapi/asm/Kbuild
index 4aa680ca2e5f..c6d141d7b7d7 100644
--- a/arch/loongarch/include/uapi/asm/Kbuild
+++ b/arch/loongarch/include/uapi/asm/Kbuild
@@ -1,2 +1,4 @@
 # SPDX-License-Identifier: GPL-2.0
+syscall-y += unistd_64.h
+
 generic-y += kvm_para.h
diff --git a/arch/loongarch/include/uapi/asm/unistd.h b/arch/loongarch/include/uapi/asm/unistd.h
index 191614b9b207..1f01980f9c94 100644
--- a/arch/loongarch/include/uapi/asm/unistd.h
+++ b/arch/loongarch/include/uapi/asm/unistd.h
@@ -1,4 +1,3 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
-#define __ARCH_WANT_SYS_CLONE
 
-#include <asm-generic/unistd.h>
+#include <asm/unistd_64.h>
diff --git a/arch/loongarch/kernel/Makefile.syscalls b/arch/loongarch/kernel/Makefile.syscalls
new file mode 100644
index 000000000000..ab7d9baa2915
--- /dev/null
+++ b/arch/loongarch/kernel/Makefile.syscalls
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+# No special ABIs on loongarch so far
+syscall_abis_64 +=
diff --git a/arch/loongarch/kernel/syscall.c b/arch/loongarch/kernel/syscall.c
index 8801611143ab..ec17cd5163b7 100644
--- a/arch/loongarch/kernel/syscall.c
+++ b/arch/loongarch/kernel/syscall.c
@@ -20,6 +20,7 @@
 
 #undef __SYSCALL
 #define __SYSCALL(nr, call)	[nr] = (call),
+#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
 
 SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, unsigned long,
 		prot, unsigned long, flags, unsigned long, fd, unsigned long, offset)
@@ -32,7 +33,7 @@ SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, unsigned long,
 
 void *sys_call_table[__NR_syscalls] = {
 	[0 ... __NR_syscalls - 1] = sys_ni_syscall,
-#include <asm/unistd.h>
+#include <asm/syscall_table_64.h>
 };
 
 typedef long (*sys_call_fn)(unsigned long, unsigned long,
-- 
2.39.2