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linux/arch/sh/kernel
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Arnd Bergmann 30766f1105 sh: rework sync_file_range ABI 
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>
2024-06-25 15:57:26 +02:00
..
cpu sh: sh7757: Add missing #include <asm/mmzone.h> 2024-05-02 12:01:31 +02:00
syscalls sh: rework sync_file_range ABI 2024-06-25 15:57:26 +02:00
vsyscall arch: use $(obj)/ instead of $(src)/ for preprocessed linker scripts 2024-05-02 20:14:16 +09:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
asm-offsets.c
crash_dump.c vmcore: convert copy_oldmem_page() to take an iov_iter 2022-04-29 14:37:59 -07:00
debugtraps.S
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 sh: dwarf: Make dwarf_lookup_fde() static 2024-05-02 12:01:25 +02:00
entry-common.S sh: fix syscall tracing 2020-09-13 21:22:55 -04:00
ftrace.c ftrace: Cleanup ftrace_dyn_arch_init() 2021-10-08 19:41:39 -04:00
head_32.S sh: init: use OF_EARLY_FLATTREE for early init 2023-03-23 10:00:03 +01:00
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() 2023-06-16 10:16:00 +02:00
io.c
io_trapped.c sh: remove CONFIG_SET_FS support 2022-02-25 09:36:06 +01:00
iomap.c iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
ioport.c sh: machvec: Remove custom ioport_{un,}map() 2023-10-25 16:50:30 +02:00
irq.c asm-generic: Conditionally enable do_softirq_own_stack() via Kconfig. 2022-09-05 17:20:55 +02:00
irq_32.c
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: Remove unneeded kprobe_opcode_t casts 2024-05-02 12:01:25 +02:00
machine_kexec.c arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.c 2024-02-23 17:48:25 -08:00
machvec.c sh: machvec: Use char[] for section boundaries 2022-09-13 10:33:17 -07:00
Makefile arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.c 2024-02-23 17:48:25 -08:00
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 2023-03-23 10:00:02 +01:00
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 kernel: exit: cleanup release_thread() 2022-09-11 21:55:07 -07:00
ptrace.c
ptrace_32.c sh: ptrace: user_regset_copyin_ignore() always returns 0 2022-11-15 14:30:41 -08:00
reboot.c sh, kexec: fix the incorrect ifdeffery and dependency of CONFIG_KEXEC 2023-12-12 17:20:18 -08:00
relocate_kernel.S
return_address.c sh: return_address: Add missing #include <asm/ftrace.h> 2024-05-02 12:01:23 +02:00
setup.c sh, crash: wrap crash dumping code into crash related ifdefs 2024-02-23 17:48:23 -08:00
sh_bios.c
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 2023-03-09 10:01:59 -08:00
smp.c sh: smp: Protect setup_profiling_timer() by CONFIG_PROFILING 2024-05-13 15:37:11 +02:00
stacktrace.c sh: stacktrace: Remove stacktrace_ops.stack() 2020-08-14 22:05:11 -04:00
swsusp.c
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 2024-06-25 15:57:26 +02:00
syscalls_32.S
time.c sh: add the sh_ prefix to early platform symbols 2019-10-07 13:50:48 +02:00
topology.c drivers/base/node: consolidate node device subsystem initialization in node_dev_init() 2022-03-22 15:57:10 -07:00
traps.c sh: ftrace: Fix missing prototypes 2024-05-02 12:01:24 +02:00
traps_32.c sh: traps: Make is_dsp_inst() static 2024-05-02 12:01:31 +02:00
unwinder.c
vmcore_info.c arch, crash: move arch_crash_save_vmcoreinfo() out to file vmcore_info.c 2024-02-23 17:48:25 -08:00
vmlinux.lds.S Scheduler updates in this cycle are: 2023-02-20 17:41:08 -08:00