There is a lot of code needs to set the range of vma in mmap.c, introduce vma_set_range() to simplify the code. Signed-off-by: Yajun Deng <yajun.deng@xxxxxxxxx> --- v2: use vma_set_range and put it to mm/internal.h. v1: https://lore.kernel.org/all/20240111021526.3461825-1-yajun.deng@xxxxxxxxx/ --- mm/internal.h | 9 +++++++++ mm/mmap.c | 29 +++++++---------------------- 2 files changed, 16 insertions(+), 22 deletions(-) diff --git a/mm/internal.h b/mm/internal.h index f309a010d50f..1e29c5821a1d 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -1114,6 +1114,15 @@ static inline bool gup_must_unshare(struct vm_area_struct *vma, extern bool mirrored_kernelcore; extern bool memblock_has_mirror(void); +static __always_inline void vma_set_range(struct vm_area_struct *vma, + unsigned long start, unsigned long end, + pgoff_t pgoff) +{ + vma->vm_start = start; + vma->vm_end = end; + vma->vm_pgoff = pgoff; +} + static inline bool vma_soft_dirty_enabled(struct vm_area_struct *vma) { /* diff --git a/mm/mmap.c b/mm/mmap.c index cf2f058bb3ae..7a9d2895a1bd 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -663,9 +663,7 @@ int vma_expand(struct vma_iterator *vmi, struct vm_area_struct *vma, vma_prepare(&vp); vma_adjust_trans_huge(vma, start, end, 0); - vma->vm_start = start; - vma->vm_end = end; - vma->vm_pgoff = pgoff; + vma_set_range(vma, start, end, pgoff); vma_iter_store(vmi, vma); vma_complete(&vp, vmi, vma->vm_mm); @@ -708,9 +706,7 @@ int vma_shrink(struct vma_iterator *vmi, struct vm_area_struct *vma, vma_adjust_trans_huge(vma, start, end, 0); vma_iter_clear(vmi); - vma->vm_start = start; - vma->vm_end = end; - vma->vm_pgoff = pgoff; + vma_set_range(vma, start, end, pgoff); vma_complete(&vp, vmi, vma->vm_mm); return 0; } @@ -1015,10 +1011,7 @@ static struct vm_area_struct vma_prepare(&vp); vma_adjust_trans_huge(vma, vma_start, vma_end, adj_start); - - vma->vm_start = vma_start; - vma->vm_end = vma_end; - vma->vm_pgoff = vma_pgoff; + vma_set_range(vma, vma_start, vma_end, vma_pgoff); if (vma_expanded) vma_iter_store(vmi, vma); @@ -2809,11 +2802,9 @@ unsigned long mmap_region(struct file *file, unsigned long addr, } vma_iter_config(&vmi, addr, end); - vma->vm_start = addr; - vma->vm_end = end; + vma_set_range(vma, addr, end, pgoff); vm_flags_init(vma, vm_flags); vma->vm_page_prot = vm_get_page_prot(vm_flags); - vma->vm_pgoff = pgoff; if (file) { vma->vm_file = get_file(file); @@ -3163,9 +3154,7 @@ static int do_brk_flags(struct vma_iterator *vmi, struct vm_area_struct *vma, goto unacct_fail; vma_set_anonymous(vma); - vma->vm_start = addr; - vma->vm_end = addr + len; - vma->vm_pgoff = addr >> PAGE_SHIFT; + vma_set_range(vma, addr, addr + len, addr >> PAGE_SHIFT); vm_flags_init(vma, flags); vma->vm_page_prot = vm_get_page_prot(flags); vma_start_write(vma); @@ -3402,9 +3391,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap, new_vma = vm_area_dup(vma); if (!new_vma) goto out; - new_vma->vm_start = addr; - new_vma->vm_end = addr + len; - new_vma->vm_pgoff = pgoff; + vma_set_range(new_vma, addr, addr + len, pgoff); if (vma_dup_policy(vma, new_vma)) goto out_free_vma; if (anon_vma_clone(new_vma, vma)) @@ -3572,9 +3559,7 @@ static struct vm_area_struct *__install_special_mapping( if (unlikely(vma == NULL)) return ERR_PTR(-ENOMEM); - vma->vm_start = addr; - vma->vm_end = addr + len; - + vma_set_range(vma, addr, addr + len, 0); vm_flags_init(vma, (vm_flags | mm->def_flags | VM_DONTEXPAND | VM_SOFTDIRTY) & ~VM_LOCKED_MASK); vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); -- 2.25.1
