On Fri, Jun 21, 2024 at 12:24 AM Arnd Bergmann <arnd@xxxxxxxxxx> wrote: > > From: Arnd Bergmann <arnd@xxxxxxxx> > > Both of these architectures require u64 function arguments to be > passed in even/odd pairs of registers or stack slots, which in case of > sync_file_range would result in a seven-argument system call that is > not currently possible. The system call is therefore incompatible with > all existing binaries. > > While it would be possible to implement support for seven arguments > like on mips, it seems better to use a six-argument version, either > with the normal argument order but misaligned as on most architectures > or with the reordered sync_file_range2() calling conventions as on > arm and powerpc. > > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> > --- > arch/csky/include/uapi/asm/unistd.h | 1 + > arch/hexagon/include/uapi/asm/unistd.h | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/arch/csky/include/uapi/asm/unistd.h b/arch/csky/include/uapi/asm/unistd.h > index 7ff6a2466af1..e0594b6370a6 100644 > --- a/arch/csky/include/uapi/asm/unistd.h > +++ b/arch/csky/include/uapi/asm/unistd.h > @@ -6,6 +6,7 @@ > #define __ARCH_WANT_SYS_CLONE3 > #define __ARCH_WANT_SET_GET_RLIMIT > #define __ARCH_WANT_TIME32_SYSCALLS > +#define __ARCH_WANT_SYNC_FILE_RANGE2 For csky part. Acked-by: Guo Ren <guoren@xxxxxxxxxx> > #include <asm-generic/unistd.h> > > #define __NR_set_thread_area (__NR_arch_specific_syscall + 0) > diff --git a/arch/hexagon/include/uapi/asm/unistd.h b/arch/hexagon/include/uapi/asm/unistd.h > index 432c4db1b623..21ae22306b5d 100644 > --- a/arch/hexagon/include/uapi/asm/unistd.h > +++ b/arch/hexagon/include/uapi/asm/unistd.h > @@ -36,5 +36,6 @@ > #define __ARCH_WANT_SYS_VFORK > #define __ARCH_WANT_SYS_FORK > #define __ARCH_WANT_TIME32_SYSCALLS > +#define __ARCH_WANT_SYNC_FILE_RANGE2 > > #include <asm-generic/unistd.h> > -- > 2.39.2 > -- Best Regards Guo Ren
