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Add kernelcompat for list_lru

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Add kernelcompat helpers for initial use of list_lru for shrinking.  The
most complicated part is the walk callback type changing.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2025-09-10 16:40:18 -07:00
parent 206c24c41f
commit 8b6418fb79
3 changed files with 150 additions and 0 deletions
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37
kmod/src/Makefile.kernelcompat
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@@ -425,3 +425,40 @@ endif
ifneq (,$(shell grep 'int ..remap_pages..struct vm_area_struct' include/linux/mm.h))
ccflags-y += -DKC_MM_REMAP_PAGES
endif
#
# v3.19-4742-g503c358cf192
#
# list_lru_shrink_count() and list_lru_shrink_walk() introduced
#
ifneq (,$(shell grep 'list_lru_shrink_count.*struct list_lru' include/linux/list_lru.h))
ccflags-y += -DKC_LIST_LRU_SHRINK_COUNT_WALK
endif
#
# v3.19-4757-g3f97b163207c
#
# lru_list_walk_cb lru arg added
#
ifneq (,$(shell grep 'struct list_head \*item, spinlock_t \*lock, void \*cb_arg' include/linux/list_lru.h))
ccflags-y += -DKC_LIST_LRU_WALK_CB_ITEM_LOCK
endif
#
# v6.7-rc4-153-g0a97c01cd20b
#
# list_lru_{add,del} -> list_lru_{add,del}_obj
#
ifneq (,$(shell grep '^bool list_lru_add_obj' include/linux/list_lru.h))
ccflags-y += -DKC_LIST_LRU_ADD_OBJ
endif
#
# v6.12-rc6-227-gda0c02516c50
#
# lru_list_walk_cb lock arg removed
#
ifneq (,$(shell grep 'struct list_lru_one \*list, spinlock_t \*lock, void \*cb_arg' include/linux/list_lru.h))
ccflags-y += -DKC_LIST_LRU_WALK_CB_LIST_LOCK
endif