diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page-writeback.c | 53 |
1 files changed, 15 insertions, 38 deletions
diff --git a/mm/page-writeback.c b/mm/page-writeback.c index 41128ea9c997..337cafe9978c 100644 --- a/mm/page-writeback.c +++ b/mm/page-writeback.c @@ -2526,12 +2526,8 @@ continue_unlock: } EXPORT_SYMBOL(write_cache_pages); -/* - * Function used by generic_writepages to call the real writepage - * function and set the mapping flags on error - */ -static int __writepage(struct page *page, struct writeback_control *wbc, - void *data) +static int writepage_cb(struct page *page, struct writeback_control *wbc, + void *data) { struct address_space *mapping = data; int ret = mapping->a_ops->writepage(page, wbc); @@ -2539,34 +2535,6 @@ static int __writepage(struct page *page, struct writeback_control *wbc, return ret; } -/** - * generic_writepages - walk the list of dirty pages of the given address space and writepage() all of them. - * @mapping: address space structure to write - * @wbc: subtract the number of written pages from *@wbc->nr_to_write - * - * This is a library function, which implements the writepages() - * address_space_operation. - * - * Return: %0 on success, negative error code otherwise - */ -int generic_writepages(struct address_space *mapping, - struct writeback_control *wbc) -{ - struct blk_plug plug; - int ret; - - /* deal with chardevs and other special file */ - if (!mapping->a_ops->writepage) - return 0; - - blk_start_plug(&plug); - ret = write_cache_pages(mapping, wbc, __writepage, mapping); - blk_finish_plug(&plug); - return ret; -} - -EXPORT_SYMBOL(generic_writepages); - int do_writepages(struct address_space *mapping, struct writeback_control *wbc) { int ret; @@ -2577,11 +2545,20 @@ int do_writepages(struct address_space *mapping, struct writeback_control *wbc) wb = inode_to_wb_wbc(mapping->host, wbc); wb_bandwidth_estimate_start(wb); while (1) { - if (mapping->a_ops->writepages) + if (mapping->a_ops->writepages) { ret = mapping->a_ops->writepages(mapping, wbc); - else - ret = generic_writepages(mapping, wbc); - if ((ret != -ENOMEM) || (wbc->sync_mode != WB_SYNC_ALL)) + } else if (mapping->a_ops->writepage) { + struct blk_plug plug; + + blk_start_plug(&plug); + ret = write_cache_pages(mapping, wbc, writepage_cb, + mapping); + blk_finish_plug(&plug); + } else { + /* deal with chardevs and other special files */ + ret = 0; + } + if (ret != -ENOMEM || wbc->sync_mode != WB_SYNC_ALL) break; /* |