[merged mm-stable] sparc-mm-drop-custom-pte_clear_not_present_full.patch removed from -mm tree

[merged mm-stable] sparc-mm-drop-custom-pte_clear_not_present_full.patch removed from -mm tree

[Andrew Morton]

The quilt patch titled
     Subject: sparc/mm: drop custom pte_clear_not_present_full()
has been removed from the -mm tree.  Its filename was
     sparc-mm-drop-custom-pte_clear_not_present_full.patch

This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: "David Hildenbrand (Arm)" <david@kernel.org>
Subject: sparc/mm: drop custom pte_clear_not_present_full()
Date: Mon, 29 Jun 2026 15:49:47 +0200

Patch series "mm: cleanup clear_not_present_full_ptes()", v2.

While doing some review, I stumbled over clear_not_present_full_ptes() and
concluded that it needs some love.

Let's remove pte_clear_not_present_full() and cleanup
clear_not_present_full_ptes(), renaming it to clear_non_present_ptes().


This patch (of 3):

On sparc64, pte_clear_not_present_full() nowadays does a simple
__set_pte_at().  In __set_pte_at() -> maybe_tlb_batch_add(), we check
pte_accessible() to see whether to call tlb_batch_add().

However, non-present PTEs are surely not accessible, so tlb_batch_add() is
never called and the "full" parameter is irrelevant.

Let's drop the helper and just let common code do a pte_clear().

pte_clear() on sparc64 maps to set_pte_at()->set_ptes()->__set_pte_at()
... so it ends up calling the same function, just with "full=0".

Given that "full" is irrelevant, there is no change.

We added pte_clear_not_present_full() for sparc64 in commit 90f08e399d05
("sparc: mmu_gather rework"), and I suspect that it was already not
required back then.

Link: https://lore.kernel.org/20260629-clear_not_present_full_ptes-v2-0-96089871a1e7@kernel.org
Link: https://lore.kernel.org/20260629-clear_not_present_full_ptes-v2-1-96089871a1e7@kernel.org
Signed-off-by: David Hildenbrand (Arm) <david@kernel.org>
Reviewed-by: Lance Yang <lance.yang@linux.dev>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Jann Horn <jannh@google.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Oscar Salvador (SUSE) <osalvador@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/sparc/include/asm/pgtable_64.h |    4 ----
 1 file changed, 4 deletions(-)

--- a/arch/sparc/include/asm/pgtable_64.h~sparc-mm-drop-custom-pte_clear_not_present_full
+++ a/arch/sparc/include/asm/pgtable_64.h
@@ -945,10 +945,6 @@ static inline void set_ptes(struct mm_st
 #define pte_clear(mm,addr,ptep)		\
 	set_pte_at((mm), (addr), (ptep), __pte(0UL))
 
-#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL
-#define pte_clear_not_present_full(mm,addr,ptep,fullmm)	\
-	__set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm))
-
 #ifdef DCACHE_ALIASING_POSSIBLE
 #define __HAVE_ARCH_MOVE_PTE
 #define move_pte(pte, old_addr, new_addr)				\
_

Patches currently in -mm which might be from david@kernel.org are

x86-mm-drop-order-parameter-from-free_pagetable.patch
mm-provide-free_reserved_pages-removing-x86-variant.patch
s390-mm-use-free_reserved_pages-in-vmem_free_pages.patch
mm-bootmem_info-allow-calling-free_bootmem_page-on-pages-without-a-bootmem_type.patch
x86-mm-stop-marking-vmemmap-as-section_info.patch
x86-mm-stop-marking-page-tables-as-mix_section_info.patch
x86-mm-remove-config_have_bootmem_info_node.patch
mm-hugetlb_vmemmap-remove-bootmem_info-leftovers.patch
mm-sparse-remove-bootmem_infoh-include.patch
mm-bootmem_info-remove-config_have_bootmem_info_node.patch
mm-standardize-printing-for-pgtable-entries.patch