On Tue, May 27, 2025 at 08:21:32PM -0700, Mina Almasry wrote:
> On Tue, May 27, 2025 at 7:29 PM Byungchul Park <byungchul@xxxxxx> wrote:
> >
> > Now that __page_pool_release_page_dma() is for releasing netmem, not
> > struct page, rename it to __page_pool_release_netmem_dma() to reflect
> > what it does.
> >
> > Signed-off-by: Byungchul Park <byungchul@xxxxxx>
> > ---
> > net/core/page_pool.c | 8 ++++----
> > 1 file changed, 4 insertions(+), 4 deletions(-)
> >
> > diff --git a/net/core/page_pool.c b/net/core/page_pool.c
> > index fb487013ef00..af889671df23 100644
> > --- a/net/core/page_pool.c
> > +++ b/net/core/page_pool.c
> > @@ -674,8 +674,8 @@ void page_pool_clear_pp_info(netmem_ref netmem)
> > netmem_set_pp(netmem, NULL);
> > }
> >
> > -static __always_inline void __page_pool_release_page_dma(struct page_pool *pool,
> > - netmem_ref netmem)
> > +static __always_inline void __page_pool_release_netmem_dma(struct page_pool *pool,
> > + netmem_ref netmem)
> > {
> > struct page *old, *page = netmem_to_page(netmem);
> > unsigned long id;
> > @@ -722,7 +722,7 @@ static void page_pool_return_netmem(struct page_pool *pool, netmem_ref netmem)
> > if (static_branch_unlikely(&page_pool_mem_providers) && pool->mp_ops)
> > put = pool->mp_ops->release_netmem(pool, netmem);
> > else
> > - __page_pool_release_page_dma(pool, netmem);
> > + __page_pool_release_netmem_dma(pool, netmem);
> >
> > /* This may be the last page returned, releasing the pool, so
> > * it is not safe to reference pool afterwards.
> > @@ -1140,7 +1140,7 @@ static void page_pool_scrub(struct page_pool *pool)
> > }
> >
> > xa_for_each(&pool->dma_mapped, id, ptr)
> > - __page_pool_release_page_dma(pool, page_to_netmem(ptr));
> > + __page_pool_release_netmem_dma(pool, page_to_netmem((struct page *)ptr));
>
> I think this needs to remain page_to_netmem(). This static cast should
Do you mean to ask to revert the casting patch of page_to_netmem()?
Or leave page_to_netmem(ptr) unchanged?
I added the casting '(struct page *)ptr' above to avoid compliler
warning.. Do you see another warning on it?
Byungchul
> generate a compiler warning since netmem_ref is a __bitwise.
>
> --
> Thanks,
> Mina
