Re: [PATCH V5 1/3] riscv: mm: Prepare for reusing PTE RSW bit(9)

[Alistair Popple]

On Thu, Jan 30, 2025 at 09:42:21AM +0100, Björn Töpel wrote:
> Chunyan Zhang <zhangchunyan@xxxxxxxxxxx> writes:
> 
> > The PTE bit(9) on RISC-V is reserved for software, it is used by devmap
> > now which has to be disabled if we want to use bit(9) for other features,
> > since there's no more free PTE bit on RISC-V now.
> >
> > So to make ARCH_HAS_PTE_DEVMAP selectable, this patch uses it as
> > the build condition of devmap definitions.
> 
> Heads-up: It seems like Alistair's series [1] that removes the devmap
> PTE bit will most likely land in 6.15.
 
That is indeed the plan/hope. I just reposted the series based on v6.14-rc1.
Note that I didn't include the devmap PTE change in the repost as I plan on
posting that as a separate followup series but I'm hoping both will make it
for v6.15.

 - Alistair

> Björn
> 
> [1] https://lore.kernel.org/linux-mm/cover.11189864684e31260d1408779fac9db80122047b.1736488799.git-series.apopple@xxxxxxxxxx/