diff options
| -rw-r--r-- | mm/vma.c | 11 | ||||
| -rw-r--r-- | mm/vma.h | 17 |
2 files changed, 21 insertions, 7 deletions
@@ -197,11 +197,9 @@ static void init_multi_vma_prep(struct vma_prepare *vp, */ static bool can_vma_merge_before(struct vma_merge_struct *vmg) { - pgoff_t pglen = PHYS_PFN(vmg->end - vmg->start); - if (is_mergeable_vma(vmg, /* merge_next = */ true) && is_mergeable_anon_vma(vmg, /* merge_next = */ true)) { - if (vmg->next->vm_pgoff == vmg->pgoff + pglen) + if (vmg_end_pgoff(vmg) == vma_start_pgoff(vmg->next)) return true; } @@ -221,7 +219,7 @@ static bool can_vma_merge_after(struct vma_merge_struct *vmg) { if (is_mergeable_vma(vmg, /* merge_next = */ false) && is_mergeable_anon_vma(vmg, /* merge_next = */ false)) { - if (vmg->prev->vm_pgoff + vma_pages(vmg->prev) == vmg->pgoff) + if (vma_end_pgoff(vmg->prev) == vmg_start_pgoff(vmg)) return true; } return false; @@ -759,7 +757,7 @@ static int commit_merge(struct vma_merge_struct *vmg) */ vma_adjust_trans_huge(vma, vmg->start, vmg->end, vmg->__adjust_middle_start ? vmg->middle : NULL); - vma_set_range(vma, vmg->start, vmg->end, vmg->pgoff); + vma_set_range(vma, vmg->start, vmg->end, vmg_start_pgoff(vmg)); vmg_adjust_set_range(vmg); vma_iter_store_overwrite(vmg->vmi, vmg->target); @@ -962,8 +960,7 @@ static __must_check struct vm_area_struct *vma_merge_existing_range( * middle next * shrink/delete extend */ - - pgoff_t pglen = PHYS_PFN(vmg->end - vmg->start); + const pgoff_t pglen = vmg_pages(vmg); VM_WARN_ON_VMG(!merge_right, vmg); /* If we are offset into a VMA, then prev must be middle. */ @@ -230,6 +230,23 @@ static inline bool vmg_nomem(struct vma_merge_struct *vmg) return vmg->state == VMA_MERGE_ERROR_NOMEM; } +static inline pgoff_t vmg_start_pgoff(const struct vma_merge_struct *vmg) +{ + return vmg->pgoff; +} + +static inline pgoff_t vmg_pages(const struct vma_merge_struct *vmg) +{ + const unsigned long size = vmg->end - vmg->start; + + return size >> PAGE_SHIFT; +} + +static inline pgoff_t vmg_end_pgoff(const struct vma_merge_struct *vmg) +{ + return vmg_start_pgoff(vmg) + vmg_pages(vmg); +} + /* Assumes addr >= vma->vm_start. */ static inline pgoff_t vma_pgoff_offset(struct vm_area_struct *vma, unsigned long addr) |