From ca1ceddfaa99e91da8b7ac24785b27d400b88309 Mon Sep 17 00:00:00 2001 From: Nathan Chancellor Date: Mon, 5 Jan 2026 12:17:10 -0700 Subject: [PATCH] ntfs3: Restore NULL folio initialization in ntfs_writepages() Clang warns (or errors with CONFIG_WERROR=y): fs/ntfs3/inode.c:1021:6: error: variable 'folio' is used uninitialized whenever 'if' condition is true [-Werror,-Wsometimes-uninitialized] 1021 | if (is_resident(ni)) { | ^~~~~~~~~~~~~~~ fs/ntfs3/inode.c:1024:48: note: uninitialized use occurs here 1024 | while ((folio = writeback_iter(mapping, wbc, folio, &err))) | ^~~~~ folio should be initialized to NULL for the first iteration of writeback_iter() to start the loop properly. Restore the NULL initialization of folio that was lost in the recent iomap conversion to clear up the warning. Fixes: 099ef9a ("fs/ntfs3: implement iomap-based file operations") Reported-by: kernel test robot Reported-by: Dan Carpenter Closes: https://lore.kernel.org/oe-kbuild-all/202601010644.FIhOXy6Y-lkp@intel.com/ Closes: https://lore.kernel.org/r/202601010513.axd56bks-lkp@intel.com/ Signed-off-by: Nathan Chancellor [almaz.alexandrovich@paragon-software.com: added a few more tags] Signed-off-by: Konstantin Komarov --- fs/ntfs3/inode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c index 636aa77e20e4..2147fce8e0b2 100644 --- a/fs/ntfs3/inode.c +++ b/fs/ntfs3/inode.c @@ -1019,7 +1019,7 @@ static int ntfs_writepages(struct address_space *mapping, return -EIO; if (is_resident(ni)) { - struct folio *folio; + struct folio *folio = NULL; while ((folio = writeback_iter(mapping, wbc, folio, &err))) err = ntfs_resident_writepage(folio, wbc); -- 2.47.3