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| author |  Miaohe Lin <linmiaohe@huawei.com>
| 2022-07-04 21:21:49 +0800 |
|---|---|---|
| committer |  akpm <akpm@linux-foundation.org>
| 2022-07-17 17:14:44 -0700 |
| commit | 5fe653e9000da9ce06e3696508c44b45315b9887 (patch) | |
| tree | bff379a00b9d5d93e10330aa7d9aa965922e01af /mm/huge_memory.c | |
| parent | mm/huge_memory: fix comment of __pud_trans_huge_lock (diff) | |
| download | linux-5fe653e9000da9ce06e3696508c44b45315b9887.tar.gz linux-5fe653e9000da9ce06e3696508c44b45315b9887.tar.bz2 linux-5fe653e9000da9ce06e3696508c44b45315b9887.zip | |
mm/huge_memory: use helper touch_pud in huge_pud_set_accessed
Use helper touch_pud to set pud accessed to simplify the code and improve
the readability. No functional change intended.
Link: https://lkml.kernel.org/r/20220704132201.14611-5-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Muchun Song <songmuchun@bytedance.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Zach O'Keefe <zokeefe@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 18 |
1 files changed, 5 insertions, 13 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index f0adc9db0d60..cda418064823 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1184,15 +1184,15 @@ out: #ifdef CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD static void touch_pud(struct vm_area_struct *vma, unsigned long addr, - pud_t *pud, int flags) + pud_t *pud, bool write) { pud_t _pud; _pud = pud_mkyoung(*pud); - if (flags & FOLL_WRITE) + if (write) _pud = pud_mkdirty(_pud); if (pudp_set_access_flags(vma, addr & HPAGE_PUD_MASK, - pud, _pud, flags & FOLL_WRITE)) + pud, _pud, write)) update_mmu_cache_pud(vma, addr, pud); } @@ -1219,7 +1219,7 @@ struct page *follow_devmap_pud(struct vm_area_struct *vma, unsigned long addr, return NULL; if (flags & FOLL_TOUCH) - touch_pud(vma, addr, pud, flags); + touch_pud(vma, addr, pud, flags & FOLL_WRITE); /* * device mapped pages can only be returned if the @@ -1284,21 +1284,13 @@ out_unlock: void huge_pud_set_accessed(struct vm_fault *vmf, pud_t orig_pud) { - pud_t entry; - unsigned long haddr; bool write = vmf->flags & FAULT_FLAG_WRITE; vmf->ptl = pud_lock(vmf->vma->vm_mm, vmf->pud); if (unlikely(!pud_same(*vmf->pud, orig_pud))) goto unlock; - entry = pud_mkyoung(orig_pud); - if (write) - entry = pud_mkdirty(entry); - haddr = vmf->address & HPAGE_PUD_MASK; - if (pudp_set_access_flags(vmf->vma, haddr, vmf->pud, entry, write)) - update_mmu_cache_pud(vmf->vma, vmf->address, vmf->pud); - + touch_pud(vmf->vma, vmf->address, vmf->pud, write); unlock: spin_unlock(vmf->ptl); } |