linux-kernel - Re: [RFC: 2.6 patch] ppc: remove APUS support

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Message-ID: <Pine.LNX.4.64.0707020114220.30442@anakin>
Date:	Mon, 2 Jul 2007 01:24:28 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Adrian Bunk <bunk@...sta.de>
cc:	Kumar Gala <galak@...escale.com>,
	David Gibson <david@...son.dropbear.id.au>,
	Paul Mackerras <paulus@...ba.org>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org, linux-m68k@...r.kernel.org
Subject: Re: [RFC: 2.6 patch] ppc: remove APUS support

On Mon, 2 Jul 2007, Adrian Bunk wrote:
> On Mon, Jul 02, 2007 at 12:55:36AM +0200, Geert Uytterhoeven wrote:
> > On Sun, 1 Jul 2007, Adrian Bunk wrote:
> > > Current status of APUS:
> > > - arch/powerpc/: a patch to remove it is in powerpc.git
> > > - arch/ppc/: marked BROKEN since 2 years
> > > 
> > > This patch therefore removes the remaining parts of APUS support.
> > 
> > > --- linux-2.6.22-rc6-mm1/include/asm-m68k/pgtable.h.old	2007-06-30 01:23:33.000000000 +0200
> > > +++ linux-2.6.22-rc6-mm1/include/asm-m68k/pgtable.h	2007-06-30 01:23:43.000000000 +0200
> > > @@ -107,8 +107,6 @@ extern void *empty_zero_page;
> > >  /* 64-bit machines, beware!  SRB. */
> > >  #define SIZEOF_PTR_LOG2			       2
> > >  
> > > -#define mm_end_of_chunk(addr, len)	0
> > > -
> > >  extern void kernel_set_cachemode(void *addr, unsigned long size, int cmode);
> > >  
> > >  /*
> > > --- linux-2.6.22-rc6-mm1/drivers/scsi/a2091.c.old	2007-06-30 01:23:53.000000000 +0200
> > > +++ linux-2.6.22-rc6-mm1/drivers/scsi/a2091.c	2007-06-30 01:24:08.000000000 +0200
> > > @@ -46,8 +46,7 @@ static int dma_setup(struct scsi_cmnd *c
> > >      struct Scsi_Host *instance = cmd->device->host;
> > >  
> > >      /* don't allow DMA if the physical address is bad */
> > > -    if (addr & A2091_XFER_MASK ||
> > > -	(!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
> > > +    if (addr & A2091_XFER_MASK)
> > >      {
> > >  	HDATA(instance)->dma_bounce_len = (cmd->SCp.this_residual + 511)
> > >  	    & ~0x1ff;
> > > --- linux-2.6.22-rc6-mm1/drivers/scsi/a3000.c.old	2007-06-30 01:24:17.000000000 +0200
> > > +++ linux-2.6.22-rc6-mm1/drivers/scsi/a3000.c	2007-06-30 01:24:26.000000000 +0200
> > > @@ -54,8 +54,7 @@ static int dma_setup(struct scsi_cmnd *c
> > >       * end of a physical memory chunk, then allocate a bounce
> > >       * buffer
> > >       */
> > > -    if (addr & A3000_XFER_MASK ||
> > > -	(!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
> > > +    if (addr & A3000_XFER_MASK)
> > >      {
> > >  	HDATA(a3000_host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
> > >  	    & ~0x1ff;
> > > --- linux-2.6.22-rc6-mm1/drivers/scsi/gvp11.c.old	2007-06-30 01:24:35.000000000 +0200
> > > +++ linux-2.6.22-rc6-mm1/drivers/scsi/gvp11.c	2007-06-30 01:24:46.000000000 +0200
> > > @@ -54,8 +54,7 @@ static int dma_setup(struct scsi_cmnd *c
> > >      static int scsi_alloc_out_of_range = 0;
> > >  
> > >      /* use bounce buffer if the physical address is bad */
> > > -    if (addr & HDATA(cmd->device->host)->dma_xfer_mask ||
> > > -	(!dir_in && mm_end_of_chunk (addr, cmd->SCp.this_residual)))
> > > +    if (addr & HDATA(cmd->device->host)->dma_xfer_mask)
> > >      {
> > >  	HDATA(cmd->device->host)->dma_bounce_len = (cmd->SCp.this_residual + 511)
> > >  	    & ~0x1ff;
> > 
> > These seem to be completely unrelated to removing APUS support?
> 
> For APUS mm_end_of_chunk() was an actual function, otherwise it was 
> always 0.

Oops, you're right.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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