Re: [Qemu-devel] [Qemu-ppc] [PATCH qemu] spapr: Drop unused parameters from fdt building helper

[David Gibson <david@gibson.dropbear.id.au>]

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On Wed, Jan 30, 2019 at 05:53:16PM +0100, Greg Kurz wrote:
> On Wed, 30 Jan 2019 17:43:44 +0100
> Philippe Mathieu-Daudé <philmd@redhat.com> wrote:
> 
> > Hi Alexey,
> > 
> > On 1/30/19 1:43 PM, Greg Kurz wrote:
> > > On Wed, 30 Jan 2019 12:42:16 +1100
> > > Alexey Kardashevskiy <aik@ozlabs.ru> wrote:
> > >   
> > >> spapr_load_rtas() handles now RTAS address and size information in the FDT
> > >> so drop them from spapr_build_fdt().
> > >>
> > >> While we are here, fix a small typo.
> > >>
> > >> Fixes: 2cac78c12ade9 "pseries: Consolidate RTAS loading"  
> > > 
> > > One nit. The last rtas_* user in spapr_build_fdt() was removed by the
> > > following hunk:
> > > 
> > > @@ -949,12 +966,6 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
> > >          }
> > >      }
> > >  
> > > -    /* RTAS */
> > > -    ret = spapr_rtas_device_tree_setup(fdt, rtas_addr, rtas_size);
> > > -    if (ret < 0) {
> > > -        error_report("Couldn't set up RTAS device tree properties");
> > > -    }
> > > -
> > >      /* cpus */
> > >      spapr_populate_cpus_dt_node(fdt, spapr);
> > >  
> > > from commit:
> > > 
> > > 3f5dabceba24 "pseries: Consolidate construction of /rtas device tree node"  
> > 
> > Can you (or David if he agrees) add a line about since when/why it is no
> > more required?
> > 
> 
> Commit 3f5dabceba24 (first released in QEMU 2.10) simply moved the FDT code
> for RTAS to some other function, leaving the rtas_addr and rtas_size arguments
> unused in spapr_build_fdt(). This patch is a trivial cleanup really.

Applied to ppc-for-4.0, with the Fixes line adjusted as suggested.

> 
> > > Reviewed-by: Greg Kurz <groug@kaod.org>
> > >   
> > >> Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>  
> > 
> > Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
> > 
> > >> ---
> > >>  hw/ppc/spapr.c | 8 +++-----
> > >>  1 file changed, 3 insertions(+), 5 deletions(-)
> > >>
> > >> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> > >> index a217c7f..fa12723 100644
> > >> --- a/hw/ppc/spapr.c
> > >> +++ b/hw/ppc/spapr.c
> > >> @@ -1225,9 +1225,7 @@ static void spapr_dt_hypervisor(sPAPRMachineState *spapr, void *fdt)
> > >>      }
> > >>  }
> > >>  
> > >> -static void *spapr_build_fdt(sPAPRMachineState *spapr,
> > >> -                             hwaddr rtas_addr,
> > >> -                             hwaddr rtas_size)
> > >> +static void *spapr_build_fdt(sPAPRMachineState *spapr)
> > >>  {
> > >>      MachineState *machine = MACHINE(spapr);
> > >>      MachineClass *mc = MACHINE_GET_CLASS(machine);
> > >> @@ -1644,14 +1642,14 @@ static void spapr_machine_reset(void)
> > >>  
> > >>      /*
> > >>       * We place the device tree and RTAS just below either the top of the RMA,
> > >> -     * or just below 2GB, whichever is lowere, so that it can be
> > >> +     * or just below 2GB, whichever is lower, so that it can be
> > >>       * processed with 32-bit real mode code if necessary
> > >>       */
> > >>      rtas_limit = MIN(spapr->rma_size, RTAS_MAX_ADDR);
> > >>      rtas_addr = rtas_limit - RTAS_MAX_SIZE;
> > >>      fdt_addr = rtas_addr - FDT_MAX_SIZE;
> > >>  
> > >> -    fdt = spapr_build_fdt(spapr, rtas_addr, spapr->rtas_size);
> > >> +    fdt = spapr_build_fdt(spapr);
> > >>  
> > >>      spapr_load_rtas(spapr, fdt, rtas_addr);
> > >>    
> > > 
> > >   
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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