[PATCH v2 3/6] mm: change to return bool for pmdp_test_and_clear_young()
Baolin Wang <[email protected]>
| Newsgroups | org.kernel.vger.linux-parisc,org.infradead.lists.linux-arm-kernel,org.infradead.lists.linux-riscv,org.kernel.vger.kvm,org.kernel.vger.linux-kernel,org.kernel.vger.linux-s390,org.kvack.linux-mm,org.ozlabs.lists.linuxppc-dev |
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| Message-ID | <f1d31307a13365d3d0fed5809727dcc2dd59631b.1774075004.git.baolin.wang@linux.alibaba.com> |
Callers use pmdp_test_and_clear_young() to clear the young flag and check whether it was set for this PMD entry. Change the return type to bool to make the intention clearer. Reviewed-by: Ritesh Harjani (IBM) <[email protected]> Reviewed-by: Lorenzo Stoakes (Oracle) <[email protected]> Signed-off-by: Baolin Wang <[email protected]> --- arch/arm64/include/asm/pgtable.h | 5 ++--- arch/powerpc/include/asm/book3s/64/pgtable.h | 10 +++++----- arch/powerpc/mm/book3s64/pgtable.c | 4 ++-- arch/riscv/include/asm/pgtable.h | 4 ++-- arch/s390/include/asm/pgtable.h | 4 ++-- arch/x86/include/asm/pgtable.h | 4 ++-- arch/x86/mm/pgtable.c | 6 +++--- include/linux/pgtable.h | 19 +++++++++---------- 8 files changed, 27 insertions(+), 29 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 1009f719b157..52bafe79c10a 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1320,9 +1320,8 @@ static inline bool __ptep_clear_flush_young(struct vm_area_struct *vma, #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG) #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG -static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, - pmd_t *pmdp) +static inline bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) { /* Operation applies to PMD table entry only if FEAT_HAFT is enabled */ VM_WARN_ON(pmd_table(READ_ONCE(*pmdp)) && !system_supports_haft()); diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h index c049a2e26e25..8b354e81ab22 100644 --- a/arch/powerpc/include/asm/book3s/64/pgtable.h +++ b/arch/powerpc/include/asm/book3s/64/pgtable.h @@ -1161,13 +1161,13 @@ pud_hugepage_update(struct mm_struct *mm, unsigned long addr, pud_t *pudp, * For radix we should always find H_PAGE_HASHPTE zero. Hence * the below will work for radix too */ -static inline int __pmdp_test_and_clear_young(struct mm_struct *mm, - unsigned long addr, pmd_t *pmdp) +static inline bool __pmdp_test_and_clear_young(struct mm_struct *mm, + unsigned long addr, pmd_t *pmdp) { unsigned long old; if ((pmd_raw(*pmdp) & cpu_to_be64(_PAGE_ACCESSED | H_PAGE_HASHPTE)) == 0) - return 0; + return false; old = pmd_hugepage_update(mm, addr, pmdp, _PAGE_ACCESSED, 0); return ((old & _PAGE_ACCESSED) != 0); } @@ -1300,8 +1300,8 @@ extern int pudp_set_access_flags(struct vm_area_struct *vma, pud_t entry, int dirty); #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG -extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, pmd_t *pmdp); +bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp); #define __HAVE_ARCH_PUDP_TEST_AND_CLEAR_YOUNG extern int pudp_test_and_clear_young(struct vm_area_struct *vma, unsigned long address, pud_t *pudp); diff --git a/arch/powerpc/mm/book3s64/pgtable.c b/arch/powerpc/mm/book3s64/pgtable.c index 4b09c04654a8..c584321e3d41 100644 --- a/arch/powerpc/mm/book3s64/pgtable.c +++ b/arch/powerpc/mm/book3s64/pgtable.c @@ -98,8 +98,8 @@ int pudp_set_access_flags(struct vm_area_struct *vma, unsigned long address, } -int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, pmd_t *pmdp) +bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) { return __pmdp_test_and_clear_young(vma->vm_mm, address, pmdp); } diff --git a/arch/riscv/include/asm/pgtable.h b/arch/riscv/include/asm/pgtable.h index b9dacfc280b1..67e7746e3fbe 100644 --- a/arch/riscv/include/asm/pgtable.h +++ b/arch/riscv/include/asm/pgtable.h @@ -1015,8 +1015,8 @@ static inline int pmdp_set_access_flags(struct vm_area_struct *vma, } #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG -static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, pmd_t *pmdp) +static inline bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) { return ptep_test_and_clear_young(vma, address, (pte_t *)pmdp); } diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index ac74b5076d8f..87a5082da28e 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1683,8 +1683,8 @@ static inline int pmdp_set_access_flags(struct vm_area_struct *vma, } #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG -static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long addr, pmd_t *pmdp) +static inline bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long addr, pmd_t *pmdp) { pmd_t pmd = *pmdp; diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 3993657e0a35..ba867bac6096 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1295,8 +1295,8 @@ extern int pudp_set_access_flags(struct vm_area_struct *vma, pud_t entry, int dirty); #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG -extern int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long addr, pmd_t *pmdp); +bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long addr, pmd_t *pmdp); extern int pudp_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pud_t *pudp); diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c index 1348384a3bb9..b09e8c5dadf9 100644 --- a/arch/x86/mm/pgtable.c +++ b/arch/x86/mm/pgtable.c @@ -456,10 +456,10 @@ bool ptep_test_and_clear_young(struct vm_area_struct *vma, } #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG) -int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long addr, pmd_t *pmdp) +bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long addr, pmd_t *pmdp) { - int ret = 0; + bool ret = false; if (pmd_young(*pmdp)) ret = test_and_clear_bit(_PAGE_BIT_ACCESSED, diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 99450a3b0705..6db900a5d38b 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -507,25 +507,24 @@ static inline bool ptep_test_and_clear_young(struct vm_area_struct *vma, #ifndef __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG #if defined(CONFIG_TRANSPARENT_HUGEPAGE) || defined(CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG) -static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, - pmd_t *pmdp) +static inline bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) { pmd_t pmd = *pmdp; - int r = 1; + bool young = true; + if (!pmd_young(pmd)) - r = 0; + young = false; else set_pmd_at(vma->vm_mm, address, pmdp, pmd_mkold(pmd)); - return r; + return young; } #else -static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, - unsigned long address, - pmd_t *pmdp) +static inline bool pmdp_test_and_clear_young(struct vm_area_struct *vma, + unsigned long address, pmd_t *pmdp) { BUILD_BUG(); - return 0; + return false; } #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_ARCH_HAS_NONLEAF_PMD_YOUNG */ #endif -- 2.47.3