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Re: [PATCH] sh: Use generic lowlevellock-futex.h.

Torvald Riegel <> wrote:
> This completely untested patch removes the custom definitions of futex
> functions in sh lowlevellock.h, using the generic lowlevellock-futex.h
> instead.  This is part of the clean-up efforts regarding the
> glibc-internal futex API (e.g., adding proper error checking).
> This also removes the sh4 lowlevellock.h, which just requires more
> padding for the syscalls; the same requirement is made by sh4 sysdep.h,
> so INTERNAL_SYSCALL used in the generic lowlevellock-futex.h will honor
> this too.
> This keeps the custom asm for the lock fast paths because I don't know
> whether the generic C implementation would be fine.  If it would be
> (e.g., test with sh's lowlevellock.h removed), then removing the custom
> asm altogether would be even better.
> Is this OK for sh?  If not, do you have an alternative suggestion for
> how to use the generic futex interfaces?

The patch is OK.

I definitely agree with your view about the custom asm.  Switch to
the generic C implementation would be simply fine and the way to go.


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