diff --git a/arch/mips/include/uapi/asm/stat.h b/arch/mips/include/uapi/asm/stat.h
index 3d2a3b71845c..8a8bb78883a4 100644
--- a/arch/mips/include/uapi/asm/stat.h
+++ b/arch/mips/include/uapi/asm/stat.h
@@ -19,11 +19,11 @@
 struct stat {
 	unsigned	st_dev;
 	long		st_pad1[3];		/* Reserved for network id */
-	ino_t		st_ino;
-	mode_t		st_mode;
+	__kernel_ino_t	st_ino;
+	__kernel_mode_t	st_mode;
 	__u32		st_nlink;
-	uid_t		st_uid;
-	gid_t		st_gid;
+	__kernel_uid_t	st_uid;
+	__kernel_gid_t	st_gid;
 	unsigned	st_rdev;
 	long		st_pad2[2];
 	long		st_size;
@@ -55,11 +55,11 @@ struct stat64 {
 
 	unsigned long long	st_ino;
 
-	mode_t		st_mode;
+	__kernel_mode_t	st_mode;
 	__u32		st_nlink;
 
-	uid_t		st_uid;
-	gid_t		st_gid;
+	__kernel_uid_t	st_uid;
+	__kernel_gid_t	st_gid;
 
 	unsigned long	st_rdev;
 	unsigned long	st_pad1[3];	/* Reserved for st_rdev expansion  */
@@ -96,11 +96,11 @@ struct stat {
 
 	unsigned long		st_ino;
 
-	mode_t			st_mode;
+	__kernel_mode_t		st_mode;
 	__u32			st_nlink;
 
-	uid_t			st_uid;
-	gid_t			st_gid;
+	__kernel_uid_t		st_uid;
+	__kernel_gid_t		st_gid;
 
 	unsigned int		st_rdev;
 	unsigned int		st_pad1[3]; /* Reserved for st_rdev expansion */
diff --git a/arch/powerpc/include/uapi/asm/stat.h b/arch/powerpc/include/uapi/asm/stat.h
index 7871055e5e32..a28c9a1201fa 100644
--- a/arch/powerpc/include/uapi/asm/stat.h
+++ b/arch/powerpc/include/uapi/asm/stat.h
@@ -29,16 +29,16 @@ struct __old_kernel_stat {
 
 struct stat {
 	unsigned long	st_dev;
-	ino_t		st_ino;
+	__kernel_ino_t	st_ino;
 #ifdef __powerpc64__
 	unsigned long	st_nlink;
-	mode_t		st_mode;
+	__kernel_mode_t	st_mode;
 #else
-	mode_t		st_mode;
+	__kernel_mode_t	st_mode;
 	unsigned short	st_nlink;
 #endif
-	uid_t		st_uid;
-	gid_t		st_gid;
+	__kernel_uid_t	st_uid;
+	__kernel_gid_t	st_gid;
 	unsigned long	st_rdev;
 	long		st_size;
 	unsigned long	st_blksize;
diff --git a/arch/sparc/include/uapi/asm/stat.h b/arch/sparc/include/uapi/asm/stat.h
index 732c41720e24..e03d6f8ec301 100644
--- a/arch/sparc/include/uapi/asm/stat.h
+++ b/arch/sparc/include/uapi/asm/stat.h
@@ -8,11 +8,11 @@
 /* 64 bit sparc */
 struct stat {
 	unsigned int st_dev;
-	ino_t   st_ino;
-	mode_t  st_mode;
+	__kernel_ino_t st_ino;
+	__kernel_mode_t st_mode;
 	short   st_nlink;
-	uid_t   st_uid;
-	gid_t   st_gid;
+	__kernel_uid_t st_uid;
+	__kernel_gid_t st_gid;
 	unsigned int st_rdev;
 	long    st_size;
 	long    st_atime;
@@ -51,8 +51,8 @@ struct stat64 {
 /* 32 bit sparc */
 struct stat {
 	unsigned short	st_dev;
-	ino_t		st_ino;
-	mode_t		st_mode;
+	__kernel_ino_t	st_ino;
+	__kernel_mode_t	st_mode;
 	short		st_nlink;
 	unsigned short	st_uid;
 	unsigned short	st_gid;
diff --git a/include/uapi/linux/agpgart.h b/include/uapi/linux/agpgart.h
index f5251045181a..9cc3448c0b5b 100644
--- a/include/uapi/linux/agpgart.h
+++ b/include/uapi/linux/agpgart.h
@@ -52,7 +52,6 @@
 
 #ifndef __KERNEL__
 #include <linux/types.h>
-#include <stdlib.h>
 
 struct agp_version {
 	__u16 major;
@@ -64,10 +63,10 @@ typedef struct _agp_info {
 	__u32 bridge_id;	/* bridge vendor/device         */
 	__u32 agp_mode;		/* mode info of bridge          */
 	unsigned long aper_base;/* base of aperture             */
-	size_t aper_size;	/* size of aperture             */
-	size_t pg_total;	/* max pages (swap + system)    */
-	size_t pg_system;	/* max pages (system)           */
-	size_t pg_used;		/* current pages used           */
+	__kernel_size_t aper_size;	/* size of aperture             */
+	__kernel_size_t pg_total;	/* max pages (swap + system)    */
+	__kernel_size_t pg_system;	/* max pages (system)           */
+	__kernel_size_t pg_used;	/* current pages used           */
 } agp_info;
 
 typedef struct _agp_setup {
diff --git a/usr/dummy-include/stdbool.h b/usr/dummy-include/stdbool.h
new file mode 100644
index 000000000000..54ff9e9c90ac
--- /dev/null
+++ b/usr/dummy-include/stdbool.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _STDBOOL_H
+#define _STDBOOL_H
+
+#error "Please do not include <stdbool.h> from exported headers"
+
+#endif /* _STDBOOL_H */
diff --git a/usr/dummy-include/stdlib.h b/usr/dummy-include/stdlib.h
new file mode 100644
index 000000000000..e8c21888e371
--- /dev/null
+++ b/usr/dummy-include/stdlib.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+#ifndef _STDLIB_H
+#define _STDLIB_H
+
+#error "Please do not include <stdlib.h> from exported headers"
+
+#endif /* _STDLIB_H */
diff --git a/usr/include/Makefile b/usr/include/Makefile
index fa9819e022b7..e2615b9b0402 100644
--- a/usr/include/Makefile
+++ b/usr/include/Makefile
@@ -15,7 +15,7 @@ UAPI_CFLAGS += $(filter -m32 -m64 --target=%, $(KBUILD_CFLAGS))
 # USERCFLAGS might contain sysroot location for CC.
 UAPI_CFLAGS += $(USERCFLAGS)
 
-override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I$(objtree)/usr/include
+override c_flags = $(UAPI_CFLAGS) -Wp,-MMD,$(depfile) -I $(obj) -I $(srctree)/usr/dummy-include
 
 # The following are excluded for now because they fail to build.
 #
@@ -65,21 +65,11 @@ no-header-test += asm/sigcontext.h
 no-header-test += linux/if_bonding.h
 endif
 
-ifeq ($(SRCARCH),mips)
-no-header-test += asm/stat.h
-endif
-
 ifeq ($(SRCARCH),powerpc)
-no-header-test += asm/stat.h
-no-header-test += linux/bpf_perf_event.h
-endif
-
-ifeq ($(SRCARCH),riscv)
 no-header-test += linux/bpf_perf_event.h
 endif
 
 ifeq ($(SRCARCH),sparc)
-no-header-test += asm/stat.h
 no-header-test += asm/uctx.h
 no-header-test += asm/fbio.h
 endif