Hi unionfs fans: Can someone explain the mechanism of a trick in delete_whiteouts()？ .... lower_dir_dentry = unionfs_lower_dentry_idx(dentry, bindex); BUG_ON(!S_ISDIR(lower_dir_dentry->d_inode->i_mode)); lower_dir = lower_dir_dentry->d_inode; BUG_ON(!S_ISDIR(lower_dir->i_mode)); ...
I don't understanding why we need 2 BUG_ONs here. They seems to be checking the exact one thing. Background of my question is that I found a weired compiler(for sh4 target) related problem in the project, we need to remove one BUG_ON in the code, or else there will be a explode of one BUG_ON. Great appreciation if someone can provide comments. Happy hacking! /Peng
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