From 14fea6f8a37f2278a0e628b44cddcb38ae90c456 Mon Sep 17 00:00:00 2001
From: Ylarod <me@ylarod.cn>
Date: Fri, 7 Nov 2025 07:23:11 +0800
Subject: [PATCH] build: remove -Wno-implicit-function-declaration

---
 kernel/Makefile         | 2 +-
 kernel/core_hook.c      | 3 ++-
 kernel/ksu.c            | 1 +
 kernel/manager.h        | 4 +---
 kernel/selinux/Makefile | 2 +-
 kernel/selinux/rules.c  | 6 +++++-
 kernel/throne_tracker.c | 2 +-
 7 files changed, 12 insertions(+), 8 deletions(-)

diff --git a/kernel/Makefile b/kernel/Makefile
index e6d6cd9f..522e8538 100644
--- a/kernel/Makefile
+++ b/kernel/Makefile
@@ -159,7 +159,7 @@ ifeq ($(shell grep -q "struct proc_ops " $(srctree)/include/linux/proc_fs.h; ech
 ccflags-y += -DKSU_COMPAT_HAS_PROC_OPS
 endif
 
-ccflags-y += -Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-int-conversion -Wno-gcc-compat -Wno-missing-prototypes
+ccflags-y += -Wno-strict-prototypes -Wno-int-conversion -Wno-gcc-compat -Wno-missing-prototypes
 ccflags-y += -Wno-declaration-after-statement -Wno-unused-function -Wno-unused-variable
 
 all:
diff --git a/kernel/core_hook.c b/kernel/core_hook.c
index 61605b52..0b8f8398 100644
--- a/kernel/core_hook.c
+++ b/kernel/core_hook.c
@@ -389,6 +389,7 @@ void escape_to_root_for_cmd_su(uid_t target_uid, pid_t target_pid)
 
 
 #ifdef CONFIG_EXT4_FS
+extern void ext4_unregister_sysfs(struct super_block *sb);
 void nuke_ext4_sysfs(void) 
 {
     struct path path;
@@ -453,7 +454,7 @@ static bool should_umount(struct path *path)
     }
     return false;
 }
-
+extern int path_umount(struct path *path, int flags);
 static void ksu_umount_mnt(struct path *path, int flags)
 {
     int err = path_umount(path, flags);
diff --git a/kernel/ksu.c b/kernel/ksu.c
index afca0bdc..e77b50fb 100644
--- a/kernel/ksu.c
+++ b/kernel/ksu.c
@@ -64,6 +64,7 @@ int __init kernelsu_init(void)
     return 0;
 }
 
+extern void ksu_observer_exit(void);
 void kernelsu_exit(void)
 {
     ksu_allowlist_exit();
diff --git a/kernel/manager.h b/kernel/manager.h
index 4c9e9570..2421da72 100644
--- a/kernel/manager.h
+++ b/kernel/manager.h
@@ -40,6 +40,4 @@ static inline void ksu_invalidate_manager_uid(void)
 }
 
 int ksu_observer_init(void);
-void ksu_observer_exit(void);
-
-#endif
\ No newline at end of file
+#endif
diff --git a/kernel/selinux/Makefile b/kernel/selinux/Makefile
index 870750be..8e7cef1f 100644
--- a/kernel/selinux/Makefile
+++ b/kernel/selinux/Makefile
@@ -10,7 +10,7 @@ ifeq ($(shell grep -q "struct selinux_state " $(srctree)/security/selinux/includ
 ccflags-y += -DKSU_COMPAT_HAS_SELINUX_STATE
 endif
 
-ccflags-y += -Wno-implicit-function-declaration -Wno-strict-prototypes -Wno-int-conversion
+ccflags-y += -Wno-strict-prototypes -Wno-int-conversion
 ccflags-y += -Wno-declaration-after-statement -Wno-unused-function
 ccflags-y += -I$(srctree)/security/selinux -I$(srctree)/security/selinux/include
 ccflags-y += -I$(objtree)/security/selinux -include $(srctree)/include/uapi/asm-generic/errno.h
diff --git a/kernel/selinux/rules.c b/kernel/selinux/rules.c
index df8bc447..c6dad552 100644
--- a/kernel/selinux/rules.c
+++ b/kernel/selinux/rules.c
@@ -201,7 +201,11 @@ static int get_object(char *buf, char __user *user_object, size_t buf_sz,
 
     return 0;
 }
-
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(6, 4, 0))
+extern int avc_ss_reset(u32 seqno);
+#else
+extern int avc_ss_reset(struct selinux_avc *avc, u32 seqno);
+#endif
 // reset avc cache table, otherwise the new rules will not take effect if already denied
 static void reset_avc_cache()
 {
diff --git a/kernel/throne_tracker.c b/kernel/throne_tracker.c
index ca491309..548c738f 100644
--- a/kernel/throne_tracker.c
+++ b/kernel/throne_tracker.c
@@ -234,7 +234,7 @@ struct my_dir_context {
 #define FILLDIR_ACTOR_CONTINUE 0
 #define FILLDIR_ACTOR_STOP -EINVAL
 #endif
-
+extern bool is_manager_apk(char *path);
 FILLDIR_RETURN_TYPE my_actor(struct dir_context *ctx, const char *name,
                  int namelen, loff_t off, u64 ino,
                  unsigned int d_type)