To change a protection method for region tracking to find grained one, we pass the resv_map, instead of list_head, to region manipulation functions. This doesn't introduce any functional change, and it is just for preparing a next step.
Signed-off-by: Joonsoo Kim <iamjoonsoo....@lge.com> diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 8751e2c..d9cabf6 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -150,8 +150,9 @@ struct file_region { long to; }; -static long region_add(struct list_head *head, long f, long t) +static long region_add(struct resv_map *resv, long f, long t) { + struct list_head *head = &resv->regions; struct file_region *rg, *nrg, *trg; /* Locate the region we are either in or before. */ @@ -186,8 +187,9 @@ static long region_add(struct list_head *head, long f, long t) return 0; } -static long region_chg(struct list_head *head, long f, long t) +static long region_chg(struct resv_map *resv, long f, long t) { + struct list_head *head = &resv->regions; struct file_region *rg, *nrg; long chg = 0; @@ -235,8 +237,9 @@ static long region_chg(struct list_head *head, long f, long t) return chg; } -static long region_truncate(struct list_head *head, long end) +static long region_truncate(struct resv_map *resv, long end) { + struct list_head *head = &resv->regions; struct file_region *rg, *trg; long chg = 0; @@ -265,8 +268,9 @@ static long region_truncate(struct list_head *head, long end) return chg; } -static long region_count(struct list_head *head, long f, long t) +static long region_count(struct resv_map *resv, long f, long t) { + struct list_head *head = &resv->regions; struct file_region *rg; long chg = 0; @@ -392,7 +396,7 @@ void resv_map_release(struct kref *ref) struct resv_map *resv_map = container_of(ref, struct resv_map, refs); /* Clear out any active regions before we release the map. */ - region_truncate(&resv_map->regions, 0); + region_truncate(resv_map, 0); kfree(resv_map); } @@ -1099,7 +1103,7 @@ static long vma_needs_reservation(struct hstate *h, pgoff_t idx = vma_hugecache_offset(h, vma, addr); struct resv_map *resv = vma_resv_map(vma); - err = region_chg(&resv->regions, idx, idx + 1); + err = region_chg(resv, idx, idx + 1); if (err < 0) return err; return 0; @@ -1121,9 +1125,8 @@ static void vma_commit_reservation(struct hstate *h, pgoff_t idx = vma_hugecache_offset(h, vma, addr); struct resv_map *resv = vma_resv_map(vma); - /* Mark this page used in the map. */ - region_add(&resv->regions, idx, idx + 1); - } + idx = vma_hugecache_offset(h, vma, addr); + region_add(resv, idx, idx + 1); } static struct page *alloc_huge_page(struct vm_area_struct *vma, @@ -2211,7 +2214,7 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma) end = vma_hugecache_offset(h, vma, vma->vm_end); reserve = (end - start) - - region_count(&resv->regions, start, end); + region_count(resv, start, end); resv_map_put(vma); @@ -3091,7 +3094,7 @@ int hugetlb_reserve_pages(struct inode *inode, if (!vma || vma->vm_flags & VM_MAYSHARE) { resv_map = inode->i_mapping->private_data; - chg = region_chg(&resv_map->regions, from, to); + chg = region_chg(resv_map, from, to); } else { resv_map = resv_map_alloc(); @@ -3137,7 +3140,7 @@ int hugetlb_reserve_pages(struct inode *inode, * else has to be done for private mappings here */ if (!vma || vma->vm_flags & VM_MAYSHARE) - region_add(&resv_map->regions, from, to); + region_add(resv_map, from, to); return 0; out_err: if (vma) @@ -3153,7 +3156,7 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed) struct hugepage_subpool *spool = subpool_inode(inode); if (resv_map) - chg = region_truncate(&resv_map->regions, offset); + chg = region_truncate(resv_map, offset); spin_lock(&inode->i_lock); inode->i_blocks -= (blocks_per_huge_page(h) * freed); spin_unlock(&inode->i_lock); -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/