[PATCH] Revert "asm-generic: Remove unneeded __ARCH_WANT_SYS_LLSEEK macro"

[Arnd Bergmann]

On Fri, Aug 30, 2019 at 10:13 PM Michal Suchánek <msuchanek at suse.de> wrote:
> On Fri, 30 Aug 2019 21:54:43 +0200
> Arnd Bergmann <arnd at arndb.de> wrote:
> > > index 5bbf587f5bc1..2f3c4bb138c4 100644
> > > --- a/fs/read_write.c
> > > +++ b/fs/read_write.c
> > > @@ -331,7 +331,7 @@ COMPAT_SYSCALL_DEFINE3(lseek, unsigned int, fd, compat_off_t, offset, unsigned i
> > >  }
> > >  #endif
> > >
> > > -#if !defined(CONFIG_64BIT) || defined(CONFIG_COMPAT)
> > > +#ifdef __ARCH_WANT_SYS_LLSEEK
> > >  SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned long, offset_high,
> > >                 unsigned long, offset_low, loff_t __user *, result,
> > >                 unsigned int, whence)
> >
> > However, only reverting the patch will now break all newly added
> > 32-bit architectures that don't define __ARCH_WANT_SYS_LLSEEK:
> > at least nds32 and riscv32 come to mind, not sure if there is another.
>
> AFAICT nds32 never had the syscall. Its headers were added without
> __ARCH_WANT_SYS_LLSEEK before the define was removed.

nds32 got it from include/asm-generic/unistd.h

        Arnd