On Mon, Apr 24, 2023 at 12:22:30PM -0700, Randy Dunlap wrote: > On 4/23/23 22:49, Christoph Hellwig wrote: > > + if (IS_ENABLED(CONFIG_BLOCK)) > > + inode->i_fop = &def_blk_fops; > > It looks like def_blk_fops is being removed (commit message and patch > fragment below), but here (above line) it is being used. > > Am I just confused? The def_blk_fops is removed only for the !CONFIG_BLOCK case. Its usage is under a branch known at compile time, so it's optimized out for that case before trying to resolve the symbol.