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.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Link: http://lkml.kernel.org/r/20200318140253.6141-7-willy@infradead.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index ab5a3ce..d9c42d3 100644 (file)
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -2655,7 +2655,7 @@ int clear_page_dirty_for_io(struct page *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;