[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20210113124416.GB1383@lst.de>
Date: Wed, 13 Jan 2021 13:44:16 +0100
From: Christoph Hellwig <hch@....de>
To: Claire Chang <tientzu@...omium.org>
Cc: robh+dt@...nel.org, mpe@...erman.id.au, benh@...nel.crashing.org,
paulus@...ba.org, joro@...tes.org, will@...nel.org,
frowand.list@...il.com, konrad.wilk@...cle.com,
boris.ostrovsky@...cle.com, jgross@...e.com,
sstabellini@...nel.org, hch@....de, m.szyprowski@...sung.com,
robin.murphy@....com, grant.likely@....com, xypron.glpk@....de,
treding@...dia.com, mingo@...nel.org, bauerman@...ux.ibm.com,
peterz@...radead.org, gregkh@...uxfoundation.org,
saravanak@...gle.com, rafael.j.wysocki@...el.com,
heikki.krogerus@...ux.intel.com, andriy.shevchenko@...ux.intel.com,
rdunlap@...radead.org, dan.j.williams@...el.com,
bgolaszewski@...libre.com, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
iommu@...ts.linux-foundation.org, xen-devel@...ts.xenproject.org,
tfiga@...omium.org, drinkcat@...omium.org
Subject: Re: [RFC PATCH v3 3/6] swiotlb: Use restricted DMA pool if
available
> +#ifdef CONFIG_SWIOTLB
> + if (unlikely(swiotlb_force == SWIOTLB_FORCE) || dev->dma_io_tlb_mem)
> return swiotlb_map(dev, phys, size, dir, attrs);
> +#endif
Please provide a wrapper for the dev->dma_io_tlb_mem check that
always returns false if the per-device swiotlb support is not enabled.
> index 7fb2ac087d23..1f05af09e61a 100644
> --- a/kernel/dma/swiotlb.c
> +++ b/kernel/dma/swiotlb.c
> @@ -222,7 +222,6 @@ int __init swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose)
> mem->orig_addr[i] = INVALID_PHYS_ADDR;
> }
> mem->index = 0;
> - no_iotlb_memory = false;
How does this fit in here?
Powered by blists - more mailing lists