Re: arch/mips/boot/compressed/decompress.c:undefined reference to `__ashldi3'

[Andrew Morton <akpm@linux-foundation.org>]

On Thu, 1 Oct 2026 11:30:09 +0100 Pedro Falcato <pfalcato@suse.de> wrote:

> > -	bits |= (bd->inbufBits >> bd->inbufBitCount)&((1 << bits_wanted)-1);
> > +	bits |= (bd->inbufBits >> bd->inbufBitCount) & ((1ULL << bits_wanted) - 1);
> >  
> >  	return bits;
> >  }
> > 
> > 32-bit MIPS should be able to do this?
> 
> FWIW the patch seems entirely bogus. I don't think you can have inbufBitCount >=
> 32. If you could, then the patch would still not fix anything, because
> bd->inbufBits is an (32-bit) unsigned int.
> 
> As per MIPS itself, MIPS does not link ashldi3.o into the decompressor for BZ2.
> It only does so for XZ and ZSTD.
> 
> Changing arch/mips/boot/compressed/Makefile would work, but since the change is
> entirely wrong I would suggest perhaps reverting?

Sure, thanks.  Do you have time to send a formal patch?