Merge branch 'split-netmem-from-struct-page'

Byungchul Park says:

====================
Split netmem from struct page

The MM subsystem is trying to reduce struct page to a single pointer.
See the following link for your information:

   https://kernelnewbies.org/MatthewWilcox/Memdescs/Path

The first step towards that is splitting struct page by its individual
users, as has already been done with folio and slab.  This patchset does
that for page pool.

Matthew Wilcox tried and stopped the same work, you can see in:

   https://lore.kernel.org/20230111042214.907030-1-willy@infradead.org

I focused on removing the page pool members in struct page this time,
not moving the allocation code of page pool from net to mm.  It can be
done later if needed.
====================

Link: https://patch.msgid.link/20250721021835.63939-1-byungchul@sk.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index fa538feaa8d9..ae50c1641bed 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -4178,12 +4178,12 @@ int arch_lock_shadow_stack_status(struct task_struct *t, unsigned long status);
 #define PP_MAGIC_MASK ~(PP_DMA_INDEX_MASK | 0x3UL)
 
 #ifdef CONFIG_PAGE_POOL
-static inline bool page_pool_page_is_pp(struct page *page)
+static inline bool page_pool_page_is_pp(const struct page *page)
 {
 	return (page->pp_magic & PP_MAGIC_MASK) == PP_SIGNATURE;
 }
 #else
-static inline bool page_pool_page_is_pp(struct page *page)
+static inline bool page_pool_page_is_pp(const struct page *page)
 {
 	return false;
 }