taglinefilesource code
S_IFREG235fs/msdos/inode.c~MSDOS_SB(inode->i_sb)->fs_umask) | S_IFREG;
S_IFREG54include/linux/stat.h#define S_ISREG(m)  (((m) & S_IFMT) == S_IFREG)