Re: [PATCH net-next 0/5] Remove uses of kmap_atomic()

On 11/22/2022 10:50 AM, Jakub Kicinski wrote:

On Tue, 22 Nov 2022 13:29:03 +0200 Leon Romanovsky wrote:

quoted

quoted

  drivers/net/ethernet/sun/cassini.c            | 40 ++++++-------------
  drivers/net/ethernet/sun/sunvnet_common.c     |  4 +-

Dave, Jakub, Paolo
I wonder if these drivers can be simply deleted.

My thought as well. It's just a matter of digging thru the history,
platform code and the web to find potential users and contacting them.

I did a little bit of digging on these two files. Here's what I found.

For the cassini driver, I don't see any recent patches that fix an end user visible issue. There are clean ups, updates to use newer kernel APIs, and some build/memory leak fixes. I checked as far back as 2011. There are web references to some issues in kernel v2.6. I didn't see anything more recent.

The code in sunvnet_common.c seems to be common code that's used by

[1] "Sun4v LDOM Virtual Switch Driver" (ldmvsw.c, kconfig flag CONFIG_LDMVSW)

[2] "Sun LDOM virtual network driver" (sunvnet.c, kconfig flag CONFIG_SUNVNET).

These two seem to have had some feature updates around 2017, but otherwise the situation is the same as cassini.

Ani