Re: [PATCH v2 2/4] iommufd: Move iommufd_sw_msi and related functions to driver.c

[Nicolin Chen <nicolinc@nvidia.com>]

On Fri, Feb 28, 2025 at 02:02:15PM -0400, Jason Gunthorpe wrote:
> On Fri, Feb 28, 2025 at 09:54:28AM -0800, Nicolin Chen wrote:
> > > Stubbed out too if CONFIG_IRQ_MSI_IOMMU ?
> > 
> > In that case, the other caller iommufd_group_setup_msi() could be
> > {
> > #if IS_ENABLED(CONFIG_IRQ_MSI_IOMMU)
> > 	....
> > 	iommufd_sw_msi_install();
> > 	...
> > #endif
> > 	return 0;
> > }
> > ?
> 
> Or a empty static inline
>  
> > > I'm still wondering if we should use a function pointer, how big was
> > > this compiled anyhow?
> > 
> > Hmm, you mean the size of driver.o? It's 192K (before) vs 212K
> > (after).
> 
> Yes, but use the 'size' command to measure before/after

Before:
   text	   data	    bss	    dec	    hex	filename
    722	     44	      0	    766	    2fe	drivers/iommu/iommufd/driver.o
After:
   text	   data	    bss	    dec	    hex	filename
   1888	    100	      0	   1988	    7c4	drivers/iommu/iommufd/driver.o

Thanks
Nicolin