Re: [qemu-s390x] [Qemu-devel] [PATCH v4 1/6] vfio-ccw: make it safe to access channel programs

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On Thu, 11 Apr 2019 12:25:38 -0400
Eric Farman <farman@xxxxxxxxxxxxx> wrote:

> On 4/11/19 11:58 AM, Halil Pasic wrote:
> > On Wed, 10 Apr 2019 22:59:41 -0400
> > Eric Farman <farman@xxxxxxxxxxxxx> wrote:
> >   
> >> r the next release :) It would be one thing less on my plate...  
> >>>>     
> >>>
> >>> Sorry I was not able to spend any significant amount of time on this
> >>> lately.
> >>>
> >>> Gave the combined set (this + Farhans fio-ccw fixes for kernel
> >>> stacktraces v2) it a bit of smoke testing after some minor adjustments
> >>> to make it compile:
> >>>
> >>> --- a/drivers/s390/cio/vfio_ccw_ops.c
> >>> +++ b/drivers/s390/cio/vfio_ccw_ops.c
> >>> @@ -13,6 +13,7 @@
> >>>    #include <linux/vfio.h>
> >>>    #include <linux/mdev.h>
> >>>    #include <linux/nospec.h>
> >>> +#include <linux/slab.h>
> >>>    
> >>>    #include "vfio_ccw_private.h"
> >>>
> >>>      
> >>
> >> Hrm...  Taking today's master, and the two series you mention (slight
> >> adjustment to apply patch 3 of Connie's series, because part of it was
> >> split out a few weeks ago), and I don't encounter this.  Tried switching
> >> between SLUB/SLAB, but still compiles fine.  
> > 
> > Let me guess: you have CONFIG_PCI in our .config, right?
> > 
> > In arch/s390/include/asm/pci_io.h we have
> > 
> > #ifndef _ASM_S390_PCI_IO_H
> > #define _ASM_S390_PCI_IO_H
> > 
> > #ifdef CONFIG_PCI
> > 
> > #include <linux/kernel.h>
> > #include <linux/slab.h>
> > 
> > and pci_io.h comes in via
> > 
> > include/linux/vfio.h
> > include/linux/iommu.h
> > include/linux/scatterlist.h
> > arch/s390/include/asm/io.h
> > arch/s390/include/asm/pci_io.h
> > 
> > 
> > Figured it out with help from Farhan. Took me quite some time.  
> 
> That would have been useful information up front.

Indeed. It's trivial to fold that change in, though :) (Should be in
patch 4, if I see it correctly.)



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