diff options
Diffstat (limited to 'fs/btrfs/file.c')
| -rw-r--r-- | fs/btrfs/file.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 033f04b..2287545 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1481,9 +1481,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, bool force_page_uptodate = false; bool need_unlock; - nrptrs = min((iov_iter_count(i) + PAGE_CACHE_SIZE - 1) / - PAGE_CACHE_SIZE, PAGE_CACHE_SIZE / - (sizeof(struct page *))); + nrptrs = min(DIV_ROUND_UP(iov_iter_count(i), PAGE_CACHE_SIZE), + PAGE_CACHE_SIZE / (sizeof(struct page *))); nrptrs = min(nrptrs, current->nr_dirtied_pause - current->nr_dirtied); nrptrs = max(nrptrs, 8); pages = kmalloc(nrptrs * sizeof(struct page *), GFP_KERNEL); @@ -1497,8 +1496,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, size_t write_bytes = min(iov_iter_count(i), nrptrs * (size_t)PAGE_CACHE_SIZE - offset); - size_t num_pages = (write_bytes + offset + - PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + size_t num_pages = DIV_ROUND_UP(write_bytes + offset, + PAGE_CACHE_SIZE); size_t reserve_bytes; size_t dirty_pages; size_t copied; @@ -1526,9 +1525,8 @@ static noinline ssize_t __btrfs_buffered_write(struct file *file, * our prealloc extent may be smaller than * write_bytes, so scale down. */ - num_pages = (write_bytes + offset + - PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; + num_pages = DIV_ROUND_UP(write_bytes + offset, + PAGE_CACHE_SIZE); reserve_bytes = num_pages << PAGE_CACHE_SHIFT; ret = 0; } else { @@ -1590,9 +1588,8 @@ again: dirty_pages = 0; } else { force_page_uptodate = false; - dirty_pages = (copied + offset + - PAGE_CACHE_SIZE - 1) >> - PAGE_CACHE_SHIFT; + dirty_pages = DIV_ROUND_UP(copied + offset, + PAGE_CACHE_SIZE); } /* |
