diff options
Diffstat (limited to 'fs/ntfs/aops.c')
| -rw-r--r-- | fs/ntfs/aops.c | 36 |
1 files changed, 9 insertions, 27 deletions
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c index 629e7abdd840..6e5c2534f4bc 100644 --- a/fs/ntfs/aops.c +++ b/fs/ntfs/aops.c @@ -86,19 +86,15 @@ static void ntfs_end_buffer_async_read(struct buffer_head *bh, int uptodate) } /* Check for the current buffer head overflowing. */ if (unlikely(file_ofs + bh->b_size > init_size)) { - u8 *kaddr; int ofs; ofs = 0; if (file_ofs < init_size) ofs = init_size - file_ofs; local_irq_save(flags); - kaddr = kmap_atomic(page, KM_BIO_SRC_IRQ); - memset(kaddr + bh_offset(bh) + ofs, 0, - bh->b_size - ofs); - kunmap_atomic(kaddr, KM_BIO_SRC_IRQ); + zero_user_page(page, bh_offset(bh) + ofs, + bh->b_size - ofs, KM_BIO_SRC_IRQ); local_irq_restore(flags); - flush_dcache_page(page); } } else { clear_buffer_uptodate(bh); @@ -245,8 +241,7 @@ static int ntfs_read_block(struct page *page) rl = NULL; nr = i = 0; do { - u8 *kaddr; - int err; + int err = 0; if (unlikely(buffer_uptodate(bh))) continue; @@ -254,7 +249,6 @@ static int ntfs_read_block(struct page *page) arr[nr++] = bh; continue; } - err = 0; bh->b_bdev = vol->sb->s_bdev; /* Is the block within the allowed limits? */ if (iblock < lblock) { @@ -340,10 +334,7 @@ handle_hole: bh->b_blocknr = -1UL; clear_buffer_mapped(bh); handle_zblock: - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + i * blocksize, 0, blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, i * blocksize, blocksize, KM_USER0); if (likely(!err)) set_buffer_uptodate(bh); } while (i++, iblock++, (bh = bh->b_this_page) != head); @@ -460,10 +451,7 @@ retry_readpage: * ok to ignore the compressed flag here. */ if (unlikely(page->index > 0)) { - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr, 0, PAGE_CACHE_SIZE); - flush_dcache_page(page); - kunmap_atomic(kaddr, KM_USER0); + zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0); goto done; } if (!NInoAttr(ni)) @@ -790,14 +778,10 @@ lock_retry_remap: * uptodate so it can get discarded by the VM. */ if (err == -ENOENT || lcn == LCN_ENOENT) { - u8 *kaddr; - bh->b_blocknr = -1; clear_buffer_dirty(bh); - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + bh_offset(bh), 0, blocksize); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, bh_offset(bh), blocksize, + KM_USER0); set_buffer_uptodate(bh); err = 0; continue; @@ -1422,10 +1406,8 @@ retry_writepage: if (page->index >= (i_size >> PAGE_CACHE_SHIFT)) { /* The page straddles i_size. */ unsigned int ofs = i_size & ~PAGE_CACHE_MASK; - kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + ofs, 0, PAGE_CACHE_SIZE - ofs); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); + zero_user_page(page, ofs, PAGE_CACHE_SIZE - ofs, + KM_USER0); } /* Handle mst protected attributes. */ if (NInoMstProtected(ni)) |