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Arnd Bergmann 79d2e629ec sh: rework sync_file_range ABI 
commit 30766f1105 upstream.

The unusual function calling conventions on SuperH ended up causing
sync_file_range to have the wrong argument order, with the 'flags'
argument getting sorted before 'nbytes' by the compiler.

In userspace, I found that musl, glibc, uclibc and strace all expect the
normal calling conventions with 'nbytes' last, so changing the kernel
to match them should make all of those work.

In order to be able to also fix libc implementations to work with existing
kernels, they need to be able to tell which ABI is used. An easy way
to do this is to add yet another system call using the sync_file_range2
ABI that works the same on all architectures.

Old user binaries can now work on new kernels, and new binaries can
try the new sync_file_range2() to work with new kernels or fall back
to the old sync_file_range() version if that doesn't exist.

Cc: stable@vger.kernel.org
Fixes: 75c92acdd5 ("sh: Wire up new syscalls.")
Acked-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-07-05 09:14:48 +02:00
..
cpu sh: j2: Use ioremap() to translate device tree address into kernel memory 2023-07-23 13:47:20 +02:00
syscalls sh: rework sync_file_range ABI 2024-07-05 09:14:48 +02:00
vsyscall mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
asm-offsets.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crash_dump.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
debugtraps.S sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
disassemble.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
dma-coherent.c dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:06 +02:00
dumpstack.c sh: stacktrace: Remove stacktrace_ops.stack() 2020-08-14 22:05:11 -04:00
dwarf.c It appears that the zero-day bot did find a bug in my sh build. 2019-01-05 14:08:00 -08:00
entry-common.S sh: fix syscall tracing 2020-09-13 21:22:55 -04:00
ftrace.c tracing: Fix various typos in comments 2021-03-23 14:08:18 -04:00
head_32.S sh: init: use OF_EARLY_FLATTREE for early init 2023-05-17 11:50:23 +02:00
hw_breakpoint.c sh: kernel: hw_breakpoint: Fix missing break in switch statement 2019-08-11 16:15:16 -05:00
idle.c sh/cpu: Switch to arch_cpu_finalize_init() 2023-08-08 19:58:31 +02:00
io.c sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
io_trapped.c sh: unexport register_trapped_io and match_trapped_io_handler 2020-08-14 22:05:16 -04:00
iomap.c iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
ioport.c sh: don't include <asm/io_trapped.h> in <asm/io.h> 2020-08-14 22:05:16 -04:00
irq.c softirq: Move do_softirq_own_stack() to generic asm header 2021-02-10 23:34:16 +01:00
irq_32.c sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
kdebugfs.c sh: no need to check return value of debugfs_create functions 2019-06-03 15:39:40 +02:00
kgdb.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
kprobes.c sh: kprobes: Merge arch_copy_kprobe() into arch_prepare_kprobe() 2024-06-16 13:39:23 +02:00
machine_kexec.c mm: remove unneeded includes of <asm/pgalloc.h> 2020-08-07 11:33:26 -07:00
machvec.c sh: machvec: Use char[] for section boundaries 2022-10-26 12:34:36 +02:00
Makefile sh: remove -Werror from Makefiles 2020-08-14 22:05:13 -04:00
module.c sh: remove sh5 support 2020-06-01 14:48:52 -04:00
nmi_debug.c sh: nmi_debug: fix return value of __setup handler 2023-05-17 11:50:23 +02:00
perf_callchain.c sh: stacktrace: Remove stacktrace_ops.stack() 2020-08-14 22:05:11 -04:00
perf_event.c sh: Get rid of oprofile leftovers 2021-04-22 13:32:39 +01:00
process.c sh: remove sh5 support 2020-06-01 14:48:52 -04:00
process_32.c sched: Introduce task_is_running() 2021-06-18 11:43:07 +02:00
ptrace.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ptrace_32.c sh: fix syscall tracing 2020-09-13 21:22:55 -04:00
reboot.c sh: remove sh5 support 2020-06-01 14:48:52 -04:00
relocate_kernel.S sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
return_address.c sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
setup.c sh/cpu: Switch to arch_cpu_finalize_init() 2023-08-08 19:58:31 +02:00
sh_bios.c sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
sh_ksyms_32.c sh: Add missing DECLARE_EXPORT() for __ashiftrt_r4_xx 2020-06-01 14:48:49 -04:00
signal_32.c sh: sanitize the flags on sigreturn 2023-03-30 12:47:54 +02:00
smp.c sched/core: Initialize the idle task with preemption disabled 2021-05-12 13:01:45 +02:00
stacktrace.c sh: stacktrace: Remove stacktrace_ops.stack() 2020-08-14 22:05:11 -04:00
swsusp.c sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
sys_sh.c mmap locking API: use coccinelle to convert mmap_sem rwsem call sites 2020-06-09 09:39:14 -07:00
sys_sh32.c sh: rework sync_file_range ABI 2024-07-05 09:14:48 +02:00
syscalls_32.S sh: remove nargs from __SYSCALL 2019-03-05 21:07:13 -08:00
time.c sh: add the sh_ prefix to early platform symbols 2019-10-07 13:50:48 +02:00
topology.c mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA 2021-06-29 10:53:55 -07:00
traps.c exit: Add and use make_task_dead. 2023-02-01 08:27:20 +01:00
traps_32.c uaccess: add force_uaccess_{begin,end} helpers 2020-08-12 10:57:59 -07:00
unwinder.c sh: kernel: convert to SPDX identifiers 2018-12-28 12:11:45 -08:00
vmlinux.lds.S sh: define RUNTIME_DISCARD_EXIT 2023-03-17 08:49:03 +01:00