Custom Search

Re: [PATCH 00/10] Enhance /dev/mem to allow read/write of arbitrary physical addresses

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]



On 20/06/11 10:42, Matthew Wilcox wrote:
On Mon, Jun 20, 2011 at 09:02:17AM +1000, Ryan Mallon wrote:
There are drivers where this makes sense. For example an FPGA device
with a proprietary register layout on the memory bus can be done this
way. The FPGA can simply be mapped in user-space via /dev/mem and
handled there. If the device requires no access other than memory bus
reads and writes then writing a custom char device driver just to get an
mmap function seems a bit overkill.
Calling a 30 line device driver "overkill" might in itself be overkill?

I mean overkill in the sense of having to write the driver at all. Why write a 30 line driver just to re-implement some functionality of /dev/mem?

~Ryan

--
To unsubscribe from this list: send the line "unsubscribe linux-ia64" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Linux Kernel]     [Sparc Linux]     [DCCP]     [Linux ARM]     [Linux]     [Photo]     [Yosemite News]     [Linux SCSI]     [Linux x86_64]     [Linux Hams]

  Powered by Linux