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mqxo2C7mB/ziWHUUw9bEhTPLGEQcetPq9GCAKEBCGITdlGMzIpav7LCVjmCd2ijDdzBPmsLzRr4 SLTkUlwz9/h0OT7Pt4eWggEHlY7sKq7gt9sd6/cOBRof6M9uzHBVc4zsbmk5g1/rVdw2dWD/+Cd uLsrRP7f3ajxM7aZPIogKsyNg5hbG+/N/LfQ6v4Uivmx6fOpTKhuUFDX/wdMWE4egE9D+B44IGW 1FuVt6ec844AE7h2CXQLYBXAw2wklpYp4QLO/R9ygrsBiFBGDwAkgJ06V94dq7Sf0N4oYpEz6f2 vmGwRO9cMhYBubhpa2zPW2P51iNDSfs8pMnQg44kmDwFlGhY9pc= X-Proofpoint-GUID: GvbZYmmgz1U4zaWj8fViLhhm_PjN5qEO X-Proofpoint-ORIG-GUID: GvbZYmmgz1U4zaWj8fViLhhm_PjN5qEO X-Authority-Analysis: v=2.4 cv=dParWeZb c=1 sm=1 tr=0 ts=6942a1b1 b=1 cx=c_pps a=zPCbziy225d3KhSqZt3L1A==:117 a=zPCbziy225d3KhSqZt3L1A==:17 a=6eWqkTHjU83fiwn7nKZWdM+Sl24=:19 a=z/mQ4Ysz8XfWz/Q5cLBRGdckG28=:19 a=lCpzRmAYbLLaTzLvsPZ7Mbvzbb8=:19 a=xqWC_Br6kY4A:10 a=wP3pNCr1ah4A:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=yPCof4ZbAAAA:8 a=yDX0O4jjIrK4UegQ5t0A:9 cc=ntf awl=host:12109 Content-Type: text/plain; charset="utf-8" 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 Reviewed-by: Suren Baghdasaryan --- 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_stru= ct *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 !=3D 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_inter= nal.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 addres= s_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