fs_fd            3372 fs/namespace.c SYSCALL_DEFINE3(fsmount, int, fs_fd, unsigned int, flags,
fs_fd            3422 fs/namespace.c 	f = fdget(fs_fd);
fs_fd             996 include/linux/syscalls.h asmlinkage long sys_fsconfig(int fs_fd, unsigned int cmd, const char __user *key,
fs_fd             998 include/linux/syscalls.h asmlinkage long sys_fsmount(int fs_fd, unsigned int flags, unsigned int ms_flags);