From 0b4268ac77fa6e2c05fc8b90441b0832b211385d Mon Sep 17 00:00:00 2001 From: Kaitao Cheng Date: Sun, 12 Jul 2026 17:33:26 +0800 Subject: [PATCH] mm/kconfig: drop redundant dependency wrappers Some mm Kconfig entries repeat dependencies that are already expressed by their surrounding blocks or menus. The zsmalloc allocator options menu already depends on ZSMALLOC, so the outer if ZSMALLOC block does not add any extra constraint. MEMORY_HOTREMOVE and MHP_MEMMAP_ON_MEMORY are both inside the if MEMORY_HOTPLUG block, so their local depends on MEMORY_HOTPLUG entries are redundant. PTE_MARKER_UFFD_WP is the only entry under if USERFAULTFD. Move the USERFAULTFD dependency into the symbol itself and combine it with the architecture support dependency. This keeps the same visibility and defaults while avoiding duplicate dependency expressions. Link: https://lore.kernel.org/20260712093326.8313-1-kaitao.cheng@linux.dev Signed-off-by: Kaitao Cheng Suggested-by: Julian Braha Reviewed-by: Lorenzo Stoakes (ARM) Acked-by: David Hildenbrand (Arm) Cc: Liam R. Howlett Cc: Michal Hocko Cc: Mike Rapoport Cc: Muchun Song Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton --- mm/Kconfig | 10 +--------- 1 file changed, 1 insertion(+), 9 deletions(-) diff --git a/mm/Kconfig b/mm/Kconfig index d28dde592de4..060190e12bce 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -125,8 +125,6 @@ config ZSWAP_COMPRESSOR_DEFAULT config ZSMALLOC tristate -if ZSMALLOC - menu "Zsmalloc allocator options" depends on ZSMALLOC @@ -161,8 +159,6 @@ config ZSMALLOC_CHAIN_SIZE endmenu -endif - menu "Slab allocator options" config SLUB @@ -583,12 +579,10 @@ endchoice config MEMORY_HOTREMOVE bool "Allow for memory hot remove" - depends on MEMORY_HOTPLUG select MIGRATION config MHP_MEMMAP_ON_MEMORY def_bool y - depends on MEMORY_HOTPLUG depends on ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE endif # MEMORY_HOTPLUG @@ -1393,17 +1387,15 @@ menuconfig USERFAULTFD Enable the userfaultfd() system call that allows to intercept and handle page faults in userland. -if USERFAULTFD config PTE_MARKER_UFFD_WP bool "Userfaultfd write protection support for shmem/hugetlbfs" default y - depends on HAVE_ARCH_USERFAULTFD_WP + depends on USERFAULTFD && HAVE_ARCH_USERFAULTFD_WP help Allows to create marker PTEs for userfaultfd write protection purposes. It is required to enable userfaultfd write protection on file-backed memory types like shmem and hugetlbfs. -endif # USERFAULTFD # multi-gen LRU { config LRU_GEN