On Tue, Feb 15, 2022 at 1:48 AM Al Viro [off-list ref] wrote:

On Mon, Feb 14, 2022 at 05:34:49PM +0100, Arnd Bergmann wrote:

quoted

-/*
- * Sparc64 is segmented, though more like the M68K than the I386.
- * We use the secondary ASI to address user memory, which references a
- * completely different VM map, thus there is zero chance of the user
- * doing something queer and tricking us into poking kernel memory.

Actually, this part of comment probably ought to stay - it is relevant
for understanding what's going on (e.g. why is access_ok() always true, etc.)

Ok, I've put it back now.

       Arnd