From: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Subject: mm/page-writeback.c: use VM_BUG_ON_PAGE in clear_page_dirty_for_io Dumping the page information in this circumstance helps for debugging. Link: http://lkml.kernel.org/r/20200318140253.6141-7-willy@xxxxxxxxxxxxx Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Cc: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx> Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/page-writeback.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/page-writeback.c~mm-use-vm_bug_on_page-in-clear_page_dirty_for_io +++ a/mm/page-writeback.c @@ -2655,7 +2655,7 @@ int clear_page_dirty_for_io(struct page struct address_space *mapping = page_mapping(page); int ret = 0; - BUG_ON(!PageLocked(page)); + VM_BUG_ON_PAGE(!PageLocked(page), page); if (mapping && mapping_cap_account_dirty(mapping)) { struct inode *inode = mapping->host; _
