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mm/mmap: make vma_wants_writenotify return bool

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vma_wants_writenotify() should return bool, so change it.

Link: https://lkml.kernel.org/r/20240407062653.803142-1-gehao@kylinos.cn
Signed-off-by: Hao Ge <gehao@kylinos.cn>
Cc: Liam R. Howlett <Liam.Howlett@oracle.com>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Hao Ge 2024-04-07 14:26:53 +08:00 committed by Andrew Morton
parent cf93be18fa
commit 38bc9c28c3
2 changed files with 7 additions and 7 deletions
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2
include/linux/mm.h
View file

@ -2575,7 +2575,7 @@ extern unsigned long move_page_tables(struct vm_area_struct *vma,
MM_CP_UFFD_WP_RESOLVE)
bool vma_needs_dirty_tracking(struct vm_area_struct *vma);
int vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot);
bool vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot);
static inline bool vma_wants_manual_pte_write_upgrade(struct vm_area_struct *vma)
{
/*

12
mm/mmap.c
View file

@ -1514,32 +1514,32 @@ bool vma_needs_dirty_tracking(struct vm_area_struct *vma)
* to the private version (using protection_map[] without the
* VM_SHARED bit).
*/
int vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot)
bool vma_wants_writenotify(struct vm_area_struct *vma, pgprot_t vm_page_prot)
{
/* If it was private or non-writable, the write bit is already clear */
if (!vma_is_shared_writable(vma))
return 0;
return false;
/* The backer wishes to know when pages are first written to? */
if (vm_ops_needs_writenotify(vma->vm_ops))
return 1;
return true;
/* The open routine did something to the protections that pgprot_modify
* won't preserve? */
if (pgprot_val(vm_page_prot) !=
pgprot_val(vm_pgprot_modify(vm_page_prot, vma->vm_flags)))
return 0;
return false;
/*
* Do we need to track softdirty? hugetlb does not support softdirty
* tracking yet.
*/
if (vma_soft_dirty_enabled(vma) && !is_vm_hugetlb_page(vma))
return 1;
return true;
/* Do we need write faults for uffd-wp tracking? */
if (userfaultfd_wp(vma))
return 1;
return true;
/* Can the mapping track the dirty pages? */
return vma_fs_can_writeback(vma);