Broken overlayfs compilation

[faveoled]

Tried to compile Docker-enabled config. Got this error:

fs/overlayfs/super.c:985:3: error: implicit declaration of function 'rkp_reset_mnt_flags'
      [-Werror,-Wimplicit-function-declaration]
                rkp_reset_mnt_flags(ufs->upper_mnt, (MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME));
                ^
fs/overlayfs/super.c:985:3: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
fs/overlayfs/super.c:1062:9: error: implicit declaration of function 'rkp_set_mnt_flags' [-Werror,-Wimplicit-function-declaration]
        rkp_set_mnt_flags(mnt,MNT_READONLY|MNT_NOATIME);
        ^
fs/overlayfs/super.c:1062:9: error: this function declaration is not a prototype [-Werror,-Wstrict-prototypes]
4 errors generated.

Problem in code:

samsung-exynos9820/fs/overlayfs/super.c

Line 985 in 41aba77

rkp_reset_mnt_flags(ufs->upper_mnt, (MNT_NOATIME | MNT_NODIRATIME | MNT_RELATIME));

cruel-HVJ5-v5.3
kernel config here:

HVJ5-Docker.txt

[faveoled]

Disabling CONFIG_RKP_NS_PROT leads to this error:

fs/overlayfs/util.c:44:9: error: passing 'const struct cred **' to parameter of type 'struct cred **' discards qualifiers in
      nested pointer types [-Werror,-Wincompatible-pointer-types-discards-qualifiers]
        return override_creds(ofs->creator_cred);
               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
./include/linux/cred.h:184:46: note: expanded from macro 'override_creds'
#define override_creds(x) rkp_override_creds(&x)
                                             ^~
./include/linux/cred.h:210:60: note: passing argument to parameter here
extern const struct cred *rkp_override_creds(struct cred **);
                                                           ^
1 error generated.

[GoRhanHee]

Disabled Werror in Makefile

GoRhanHee/android_kernel_samsung_exynos9820@8f61e97