linux/arch
David Hildenbrand (Arm) a71638ecc6 sparc/mm: drop custom pte_clear_not_present_full()
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 90f08e399d
("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>
History 2026-07-28 21:12:09 -07:00
..
alpha pci-v7.2-changes 2026-06-24 12:48:43 -07:00
arc ARC: configs: Drop redundant I2C_DESIGNWARE_PLATFORM 2026-07-10 15:26:11 -07:00
arm ARM: Don't let ARMv5 platforms select USE_OF 2026-07-10 14:44:26 +02:00
arm64 arm64 fixes for -rc5 2026-07-24 11:50:48 -07:00
csky csky: implement flush_cache_vmap() in C 2026-07-28 21:11:48 -07:00
hexagon uaccess: unify inline vs outline copy_{from,to}_user() selection 2026-05-28 21:24:44 -07:00
loongarch LoongArch: BPF: Fix memory leak in bpf_jit_free() 2026-07-24 16:33:08 +08:00
m68k m68knommu: fix on top off v7.2-rc4 2026-07-26 08:59:55 -07:00
microblaze uaccess: unify inline vs outline copy_{from,to}_user() selection 2026-05-28 21:24:44 -07:00
mips collected fixes for 7.2 2026-07-04 06:05:28 -10:00
nios2 uaccess: unify inline vs outline copy_{from,to}_user() selection 2026-05-28 21:24:44 -07:00
openrisc mm.git review status for mm-hotfixes-stable..mm-nonmm-stable 2026-06-21 13:20:19 -07:00
parisc Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (headers) 2026-07-03 07:38:16 +02:00
powerpc mm/hugetlb: refactor early boot gigantic hugepage allocation 2026-07-28 21:11:59 -07:00
riscv RISC-V: 2026-07-21 08:26:21 -07:00
s390 Lots of fixes, double the count even for the "new normal". 2026-07-23 12:58:08 -07:00
sh Replace <linux/mod_devicetable.h> by more specific <linux/device-id/*.h> (c files) 2026-07-03 07:38:17 +02:00
sparc sparc/mm: drop custom pte_clear_not_present_full() 2026-07-28 21:12:09 -07:00
um mm.git review status for mm-hotfixes-stable..mm-nonmm-stable 2026-06-21 13:20:19 -07:00
x86 - Disable jump/lookup tables in the x86 boot decompressor code 2026-07-26 08:52:38 -07:00
xtensa mm.git review status for mm-hotfixes-stable..mm-nonmm-stable 2026-06-21 13:20:19 -07:00
.gitignore .gitignore: prefix local generated files with a slash 2021-05-02 00:43:35 +09:00
Kconfig Locking updates for v7.2: 2026-06-15 14:21:14 +05:30