[PATCH 12/17] csky: convert to generic syscall table

Arnd Bergmann
2024-07-04T14:38:11Z

From: Arnd Bergmann <arnd@arndb.de>

The uapi/asm/unistd_32.h and asm/syscall_table_32.h headers can now be
generated from scripts/syscall.tbl, which makes this consistent with
the other architectures that have their own syscall.tbl.

csky has two architecture specific system calls, which I add to
the generic table. The time32, stat64 and rlimit entries in the
syscall_abis_32 line are for system calls that were part of the generic
ABI when arch/csky got added but are no longer enabled by default for
new architectures.

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@arndb.de>
---
arch/csky/include/asm/Kbuild | 2 ++
arch/csky/include/asm/unistd.h | 3 +++
arch/csky/include/uapi/asm/Kbuild | 2 ++
arch/csky/include/uapi/asm/unistd.h | 14 ++------------
arch/csky/kernel/Makefile.syscalls | 4 ++++
arch/csky/kernel/syscall_table.c | 4 +++-
scripts/syscall.tbl | 4 ++++
7 files changed, 20 insertions(+), 13 deletions(-)
create mode 100644 arch/csky/kernel/Makefile.syscalls

diff --git a/arch/csky/include/asm/Kbuild b/arch/csky/include/asm/Kbuild
index 13ebc5e34360..9a9bc65b57a9 100644
--- a/arch/csky/include/asm/Kbuild
+++ b/arch/csky/include/asm/Kbuild
@@ -1,4 +1,6 @@
# SPDX-License-Identifier: GPL-2.0
+syscall-y := syscall_table_32.h
+
generic-y += asm-offsets.h
generic-y += extable.h
generic-y += kvm_para.h
diff --git a/arch/csky/include/asm/unistd.h b/arch/csky/include/asm/unistd.h
index 9cf97de9a26d..2c2c24de95d8 100644
--- a/arch/csky/include/asm/unistd.h
+++ b/arch/csky/include/asm/unistd.h
@@ -2,4 +2,7 @@

#include <uapi/asm/unistd.h>

+#define __ARCH_WANT_STAT64
+#define __ARCH_WANT_SYS_CLONE
+
#define NR_syscalls (__NR_syscalls)
diff --git a/arch/csky/include/uapi/asm/Kbuild b/arch/csky/include/uapi/asm/Kbuild
index e78470141932..2501e82a1a0a 100644
--- a/arch/csky/include/uapi/asm/Kbuild
+++ b/arch/csky/include/uapi/asm/Kbuild
@@ -1,2 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
+syscall-y += unistd_32.h
+
generic-y += ucontext.h
diff --git a/arch/csky/include/uapi/asm/unistd.h b/arch/csky/include/uapi/asm/unistd.h
index d529d0432876..794adbc04e48 100644
--- a/arch/csky/include/uapi/asm/unistd.h
+++ b/arch/csky/include/uapi/asm/unistd.h
@@ -1,14 +1,4 @@
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

-#define __ARCH_WANT_STAT64
-#define __ARCH_WANT_NEW_STAT
-#define __ARCH_WANT_SYS_CLONE
-#define __ARCH_WANT_SET_GET_RLIMIT
-#define __ARCH_WANT_TIME32_SYSCALLS
-#define __ARCH_WANT_SYNC_FILE_RANGE2
-#include <asm-generic/unistd.h>
-
-#define __NR_set_thread_area (__NR_arch_specific_syscall + 0)
-__SYSCALL(__NR_set_thread_area, sys_set_thread_area)
-#define __NR_cacheflush (__NR_arch_specific_syscall + 1)
-__SYSCALL(__NR_cacheflush, sys_cacheflush)
+#include <asm/unistd_32.h>
+#define __NR_sync_file_range2 __NR_sync_file_range
diff --git a/arch/csky/kernel/Makefile.syscalls b/arch/csky/kernel/Makefile.syscalls
new file mode 100644
index 000000000000..3df3b5822fce
--- /dev/null
+++ b/arch/csky/kernel/Makefile.syscalls
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+syscall_abis_32 += csky time32 stat64 rlimit
+
diff --git a/arch/csky/kernel/syscall_table.c b/arch/csky/kernel/syscall_table.c
index a0c238c5377a..a6eb91a0e2f6 100644
--- a/arch/csky/kernel/syscall_table.c
+++ b/arch/csky/kernel/syscall_table.c
@@ -6,9 +6,11 @@

#undef __SYSCALL
#define __SYSCALL(nr, call)[nr] = (call),
+#define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)

#define sys_fadvise64_64 sys_csky_fadvise64_64
+#define sys_sync_file_range sys_sync_file_range2
void * const sys_call_table[__NR_syscalls] __page_aligned_data = {
[0 ... __NR_syscalls - 1] = sys_ni_syscall,
-#include <asm/unistd.h>
+#include <asm/syscall_table_32.h>
};
diff --git a/scripts/syscall.tbl b/scripts/syscall.tbl
index 13f4c79ba5c2..ed0ecba8fea4 100644
--- a/scripts/syscall.tbl
+++ b/scripts/syscall.tbl
@@ -293,6 +293,10 @@
246 arc arc_gettls sys_arc_gettls
247 arc sysfs sys_sysfs
248 arc arc_usr_cmpxchg sys_arc_usr_cmpxchg
+
+244 csky set_thread_area sys_set_thread_area
+245 csky cacheflush sys_cacheflush
+
260 time32 wait4 sys_wait4 compat_sys_wait4
260 64 wait4 sys_wait4
261 common prlimit64 sys_prlimit64
--
2.39.2