diff options
Diffstat (limited to 'fs/dax.c')
| -rw-r--r-- | fs/dax.c | 29 |
1 files changed, 13 insertions, 16 deletions
@@ -709,26 +709,31 @@ int dax_invalidate_mapping_entry_sync(struct address_space *mapping, return __dax_invalidate_entry(mapping, index, false); } -static int copy_cow_page_dax(struct block_device *bdev, struct dax_device *dax_dev, - sector_t sector, struct page *to, unsigned long vaddr) +static sector_t dax_iomap_sector(const struct iomap *iomap, loff_t pos) { + return (iomap->addr + (pos & PAGE_MASK) - iomap->offset) >> 9; +} + +static int copy_cow_page_dax(struct vm_fault *vmf, const struct iomap_iter *iter) +{ + sector_t sector = dax_iomap_sector(&iter->iomap, iter->pos); void *vto, *kaddr; pgoff_t pgoff; long rc; int id; - rc = bdev_dax_pgoff(bdev, sector, PAGE_SIZE, &pgoff); + rc = bdev_dax_pgoff(iter->iomap.bdev, sector, PAGE_SIZE, &pgoff); if (rc) return rc; id = dax_read_lock(); - rc = dax_direct_access(dax_dev, pgoff, 1, &kaddr, NULL); + rc = dax_direct_access(iter->iomap.dax_dev, pgoff, 1, &kaddr, NULL); if (rc < 0) { dax_read_unlock(id); return rc; } - vto = kmap_atomic(to); - copy_user_page(vto, kaddr, vaddr, to); + vto = kmap_atomic(vmf->cow_page); + copy_user_page(vto, kaddr, vmf->address, vmf->cow_page); kunmap_atomic(vto); dax_read_unlock(id); return 0; @@ -1005,11 +1010,6 @@ int dax_writeback_mapping_range(struct address_space *mapping, } EXPORT_SYMBOL_GPL(dax_writeback_mapping_range); -static sector_t dax_iomap_sector(const struct iomap *iomap, loff_t pos) -{ - return (iomap->addr + (pos & PAGE_MASK) - iomap->offset) >> 9; -} - static int dax_iomap_pfn(const struct iomap *iomap, loff_t pos, size_t size, pfn_t *pfnp) { @@ -1332,19 +1332,16 @@ static vm_fault_t dax_fault_synchronous_pfnp(pfn_t *pfnp, pfn_t pfn) static vm_fault_t dax_fault_cow_page(struct vm_fault *vmf, const struct iomap_iter *iter) { - sector_t sector = dax_iomap_sector(&iter->iomap, iter->pos); - unsigned long vaddr = vmf->address; vm_fault_t ret; int error = 0; switch (iter->iomap.type) { case IOMAP_HOLE: case IOMAP_UNWRITTEN: - clear_user_highpage(vmf->cow_page, vaddr); + clear_user_highpage(vmf->cow_page, vmf->address); break; case IOMAP_MAPPED: - error = copy_cow_page_dax(iter->iomap.bdev, iter->iomap.dax_dev, - sector, vmf->cow_page, vaddr); + error = copy_cow_page_dax(vmf, iter); break; default: WARN_ON_ONCE(1); |