[PATCH 01/12] mm: Remove PFN_MAP, PFN_SG_CHAIN and PFN_SG_LAST

[Jonathan Cameron]

On Thu, 29 May 2025 16:32:02 +1000
Alistair Popple <apopple at nvidia.com> wrote:

> The PFN_MAP flag is no longer used for anything, so remove it. The
> PFN_SG_CHAIN and PFN_SG_LAST flags never appear to have been used so
> also remove them.

Superficial thing but you seem to be be removing PFN_SPECIAL as well and
this description and patche description don't mention that.

> 
> Signed-off-by: Alistair Popple <apopple at nvidia.com>
> Reviewed-by: Christoph Hellwig <hch at lst.de>

On superficial comment inline.

> ---
>  include/linux/pfn_t.h             | 31 +++----------------------------
>  mm/memory.c                       |  2 --
>  tools/testing/nvdimm/test/iomap.c |  4 ----
>  3 files changed, 3 insertions(+), 34 deletions(-)
> 
> diff --git a/include/linux/pfn_t.h b/include/linux/pfn_t.h
> index 2d91482..46afa12 100644
> --- a/include/linux/pfn_t.h
> +++ b/include/linux/pfn_t.h
> @@ -5,26 +5,13 @@



> diff --git a/tools/testing/nvdimm/test/iomap.c b/tools/testing/nvdimm/test/iomap.c
> index e431372..ddceb04 100644
> --- a/tools/testing/nvdimm/test/iomap.c
> +++ b/tools/testing/nvdimm/test/iomap.c
> @@ -137,10 +137,6 @@ EXPORT_SYMBOL_GPL(__wrap_devm_memremap_pages);
>  
>  pfn_t __wrap_phys_to_pfn_t(phys_addr_t addr, unsigned long flags)
>  {
> -	struct nfit_test_resource *nfit_res = get_nfit_res(addr);
> -
> -	if (nfit_res)
> -		flags &= ~PFN_MAP;
>          return phys_to_pfn_t(addr, flags);

Maybe not the time to point it out, but what is going on with indent here?
Looks like some spaces snuck in for that last line.



>  }
>  EXPORT_SYMBOL(__wrap_phys_to_pfn_t);