lkml.org 
[lkml]   [2018]   [Nov]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: remove the ->mapping_error method from dma_map_ops V2
On Thu, Nov 22, 2018 at 09:09:47AM -0800, Linus Torvalds wrote:
> On Thu, Nov 22, 2018 at 9:07 AM Russell King - ARM Linux
> <linux@armlinux.org.uk> wrote:
> >
> > I'm afraid that won't work very well - 32 bit platforms with 64-bit
> > addresses (LPAE) would have dma_addr_t as a 64-bit value, which
> > wouldn't fit into an unsigned long.
>
> Good point. So we'd have to have a special IS_DMA_ERR() function that
> takes a dma_addr_t and checks the same "is it the top 4095 values".

No problem with that.

--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up

\
 
 \ /
  Last update: 2018-11-22 18:15    [W:0.072 / U:1.280 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site