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mm: change to return bool for pmdp_clear_flush_young()

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The pmdp_clear_flush_young() is used to clear the young flag and flush the
TLB, returning whether the young flag was set for this PMD entry.  Change
the return type to bool to make the intention clearer.

Link: https://lkml.kernel.org/r/a668b9a974c0d675e7a41f6973bcbe3336e8b373.1774075004.git.baolin.wang@linux.alibaba.com
Signed-off-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Lorenzo Stoakes (Oracle) <ljs@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Cc: Suren Baghdasaryan <surenb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Baolin Wang
2026-03-21 14:42:52 +08:00
committed by Andrew Morton
parent 42e26354c4
commit 2d46a39747
5 changed files with 16 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/s390/include/asm/pgtable.h
View File

@@ -1693,7 +1693,7 @@ static inline bool pmdp_test_and_clear_young(struct vm_area_struct *vma,
}
#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
static inline int pmdp_clear_flush_young(struct vm_area_struct *vma,
static inline bool pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long addr, pmd_t *pmdp)
{
VM_BUG_ON(addr & ~HPAGE_MASK);

2
arch/x86/include/asm/pgtable.h
View File

@@ -1301,7 +1301,7 @@ extern int pudp_test_and_clear_young(struct vm_area_struct *vma,
unsigned long addr, pud_t *pudp);
#define __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
bool pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);

4
arch/x86/mm/pgtable.c
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@@ -503,10 +503,10 @@ bool ptep_clear_flush_young(struct vm_area_struct *vma,
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
int pmdp_clear_flush_young(struct vm_area_struct *vma,
bool pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
{
int young;
bool young;
VM_BUG_ON(address & ~HPAGE_PMD_MASK);

6
include/linux/pgtable.h
View File

@@ -536,18 +536,18 @@ bool ptep_clear_flush_young(struct vm_area_struct *vma,
#ifndef __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
extern int pmdp_clear_flush_young(struct vm_area_struct *vma,
bool pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp);
#else
/*
* Despite relevant to THP only, this API is called from generic rmap code
* under PageTransHuge(), hence needs a dummy implementation for !THP
*/
static inline int pmdp_clear_flush_young(struct vm_area_struct *vma,
static inline bool pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
{
BUILD_BUG();
return 0;
return false;
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
#endif

5
mm/pgtable-generic.c
View File

@@ -124,10 +124,11 @@ int pmdp_set_access_flags(struct vm_area_struct *vma,
#endif
#ifndef __HAVE_ARCH_PMDP_CLEAR_YOUNG_FLUSH
int pmdp_clear_flush_young(struct vm_area_struct *vma,
bool pmdp_clear_flush_young(struct vm_area_struct *vma,
unsigned long address, pmd_t *pmdp)
{
int young;
bool young;
VM_BUG_ON(address & ~HPAGE_PMD_MASK);
young = pmdp_test_and_clear_young(vma, address, pmdp);
if (young)