Subject: Re: [PATCH v1 02/16] mm/memory: remove "zap_details" parameter from zap_page_range_single()

From: Alice Ryhl <[email-masked]>
Date: Mon, 2 Mar 2026 10:01:10 +0000

On Mon, Mar 02, 2026 at 09:18:45AM +0100, David Hildenbrand (Arm) wrote:
> On 2/28/26 13:38, Alice Ryhl wrote:
> > On Fri, Feb 27, 2026 at 09:08:33PM +0100, David Hildenbrand (Arm) wrote:
> >> Nobody except memory.c should really set that parameter to non-NULL. So
> >> let's just drop it and make unmap_mapping_range_vma() use
> >> zap_page_range_single_batched() instead.
> >>
> >> Signed-off-by: David Hildenbrand (Arm) <[email-masked]>
> > 
> >> diff --git a/rust/kernel/mm/virt.rs b/rust/kernel/mm/virt.rs
> >> index da21d65ccd20..b8e59e4420f3 100644
> >> --- a/rust/kernel/mm/virt.rs
> >> +++ b/rust/kernel/mm/virt.rs
> >> @@ -124,7 +124,7 @@ pub fn zap_page_range_single(&self, address: usize, size: usize) {
> >>          // sufficient for this method call. This method has no requirements on the vma flags. The
> >>          // address range is checked to be within the vma.
> >>          unsafe {
> >> -            bindings::zap_page_range_single(self.as_ptr(), address, size, core::ptr::null_mut())
> >> +            bindings::zap_page_range_single(self.as_ptr(), address, size)
> >>          };
> > 
> > Please run rustfmt on Rust changes. Here, rustfmt leads to this being
> > formatted on a single line:
> 
> Having to run tooling I don't even have installed when removing a single
> function parameter; did not expect that :)

Well, rustfmt comes with the compiler, and it would be ideal to build
test changes before sending them :)

But no worries, I took care of testing it. Thanks for taking the time to
update the Rust code as well.

Documentation/rust/quick-start.rst has details for most distros.

Alice