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X-HE-Meta: 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 qPBe7Ybk NssDYs0hHVT9ROEwH0bQ/Nd0T44MOt596AnqbbqtJNcLI/Ri2N70ua8ZmZcTUtCR3rnMeysUU1E6oimhSLyvkML+84QxZShdmn93dv9Hl3FripyqnLy/YJuojYwGdUe3PNye/Js6H3U4zvqCt24MSTADwRMcSo2OAN+BBupJKFAAlQco= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: This function is confusing, we already have the concept of anon_vma merge to adjacent VMA's anon_vma's to increase probability of anon_vma compatibility and therefore VMA merge (see is_mergeable_anon_vma() etc.), as well as anon_vma reuse, along side the usual VMA merge logic. We can remove the anon_vma check as it is redundant - a merge would not have been permitted with removal if the anon_vma's were not the same (and in the case of an unfaulted/faulted merge, we would have already set the unfaulted VMA's anon_vma to vp->remove->anon_vma in dup_anon_vma()). Avoid overloading this term when we're very simply unlinking anon_vma state from a removed VMA upon merge. Signed-off-by: Lorenzo Stoakes --- include/linux/rmap.h | 7 ------- mm/vma.c | 2 +- tools/testing/vma/vma_internal.h | 5 ----- 3 files changed, 1 insertion(+), 13 deletions(-) diff --git a/include/linux/rmap.h b/include/linux/rmap.h index daa92a58585d..832bfc0ccfc6 100644 --- a/include/linux/rmap.h +++ b/include/linux/rmap.h @@ -165,13 +165,6 @@ static inline int anon_vma_prepare(struct vm_area_struct *vma) return __anon_vma_prepare(vma); } -static inline void anon_vma_merge(struct vm_area_struct *vma, - struct vm_area_struct *next) -{ - VM_BUG_ON_VMA(vma->anon_vma != next->anon_vma, vma); - unlink_anon_vmas(next); -} - struct anon_vma *folio_get_anon_vma(const struct folio *folio); #ifdef CONFIG_MM_ID diff --git a/mm/vma.c b/mm/vma.c index fc90befd162f..feb4bbd3b259 100644 --- a/mm/vma.c +++ b/mm/vma.c @@ -376,7 +376,7 @@ static void vma_complete(struct vma_prepare *vp, struct vma_iterator *vmi, fput(vp->file); } if (vp->remove->anon_vma) - anon_vma_merge(vp->vma, vp->remove); + unlink_anon_vmas(vp->remove); mm->map_count--; mpol_put(vma_policy(vp->remove)); if (!vp->remove2) diff --git a/tools/testing/vma/vma_internal.h b/tools/testing/vma/vma_internal.h index 9f0a9f5ed0fe..93e5792306d9 100644 --- a/tools/testing/vma/vma_internal.h +++ b/tools/testing/vma/vma_internal.h @@ -1265,11 +1265,6 @@ static inline void i_mmap_unlock_write(struct address_space *mapping) { } -static inline void anon_vma_merge(struct vm_area_struct *vma, - struct vm_area_struct *next) -{ -} - static inline int userfaultfd_unmap_prep(struct vm_area_struct *vma, unsigned long start, unsigned long end, -- 2.52.0