From 11f81becca04bb7d2826a9b65bb8d27b0a1bb543 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Fri, 22 May 2015 17:13:15 -0400 Subject: page_writeback: revive cancel_dirty_page() in a restricted form cancel_dirty_page() had some issues and b9ea25152e56 ("page_writeback: clean up mess around cancel_dirty_page()") replaced it with account_page_cleaned() which makes the caller responsible for clearing the dirty bit; unfortunately, the planned changes for cgroup writeback support requires synchronization between dirty bit manipulation and stat updates. While we can open-code such synchronization in each account_page_cleaned() callsite, that's gonna be unnecessarily awkward and verbose. This patch revives cancel_dirty_page() but in a more restricted form. All it does is TestClearPageDirty() followed by account_page_cleaned() invocation if the page was dirty. This helper covers all account_page_cleaned() usages except for __delete_from_page_cache() which is a special case anyway and left alone. As this leaves no module user for account_page_cleaned(), EXPORT_SYMBOL() is dropped from it. This patch just revives cancel_dirty_page() as a trivial wrapper to replace equivalent usages and doesn't introduce any functional changes. Signed-off-by: Tejun Heo Cc: Konstantin Khlebnikov Signed-off-by: Jens Axboe --- drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) (limited to 'drivers/staging') diff --git a/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h b/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h index d72605864b0a..14562788e4e0 100644 --- a/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h +++ b/drivers/staging/lustre/lustre/include/linux/lustre_patchless_compat.h @@ -55,9 +55,7 @@ truncate_complete_page(struct address_space *mapping, struct page *page) if (PagePrivate(page)) page->mapping->a_ops->invalidatepage(page, 0, PAGE_CACHE_SIZE); - if (TestClearPageDirty(page)) - account_page_cleaned(page, mapping); - + cancel_dirty_page(page); ClearPageMappedToDisk(page); ll_delete_from_page_cache(page); } -- cgit v1.2.3