From a62ca3f40feaaaf0dfc4db1f2edeca5a70f4123d Mon Sep 17 00:00:00 2001 From: Baolin Wang Date: Sat, 21 Mar 2026 14:42:49 +0800 Subject: mm: change to return bool for ptep_test_and_clear_young() Patch series "change young flag check functions to return bool", v2. This is a cleanup patchset to change all young flag check functions to return bool, as discussed with David in the previous thread[1]. Since callers only care about whether the young flag was set, returning bool makes the intention clearer. No functional changes intended. This patch (of 6): Callers use ptep_test_and_clear_young() to clear the young flag and check whether it was set. Change the return type to bool to make the intention clearer. Link: https://lkml.kernel.org/r/cover.1774075004.git.baolin.wang@linux.alibaba.com Link: https://lkml.kernel.org/r/57e70efa9703d43959aa645246ea3cbdba14fa17.1774075004.git.baolin.wang@linux.alibaba.com Signed-off-by: Baolin Wang Reviewed-by: Ritesh Harjani (IBM) Reviewed-by: Lorenzo Stoakes (Oracle) Acked-by: David Hildenbrand (Arm) Cc: Liam Howlett Cc: Michal Hocko Cc: Mike Rapoport Cc: Suren Baghdasaryan Signed-off-by: Andrew Morton --- include/linux/pgtable.h | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) (limited to 'include/linux') diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 17d961c612fc..8e75dc9f7932 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -491,17 +491,17 @@ static inline pgd_t pgdp_get(pgd_t *pgdp) #endif #ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG -static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, - pte_t *ptep) +static inline bool ptep_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pte_t *ptep) { pte_t pte = ptep_get(ptep); - int r = 1; + bool young = true; + if (!pte_young(pte)) - r = 0; + young = false; else set_pte_at(vma->vm_mm, address, ptep, pte_mkold(pte)); - return r; + return young; } #endif @@ -1123,10 +1123,10 @@ static inline int clear_flush_young_ptes(struct vm_area_struct *vma, * * Returns: whether any PTE was young. */ -static inline int test_and_clear_young_ptes(struct vm_area_struct *vma, +static inline bool test_and_clear_young_ptes(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep, unsigned int nr) { - int young = 0; + bool young = false; for (;;) { young |= ptep_test_and_clear_young(vma, addr, ptep); -- cgit v1.2.3