lindebugfs: Export symbols

We currently rely on the kernel linker resolving undefined references
against local symbols from other kernel modules.  Be explicit about the
symbols to export, in advance of changing that behaviour.

PR:		207898
Reviewed by:	kib, bz
Sponsored by:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D47980

sys/modules/lindebugfs/Makefile

@@ -6,4 +6,25 @@ SRCS+=	${LINUXKPI_GENSRCS}
 
 CFLAGS+= ${LINUXKPI_INCLUDES}
 
+EXPORT_SYMS=	debugfs_create_atomic_t
+EXPORT_SYMS+=	debugfs_create_blob
+EXPORT_SYMS+=	debugfs_create_bool
+EXPORT_SYMS+=	debugfs_create_dir
+EXPORT_SYMS+=	debugfs_create_file
+EXPORT_SYMS+=	debugfs_create_file_size
+EXPORT_SYMS+=	debugfs_create_file_unsafe
+EXPORT_SYMS+=	debugfs_create_mode_unsafe
+EXPORT_SYMS+=	debugfs_create_symlink
+EXPORT_SYMS+=	debugfs_create_u8
+EXPORT_SYMS+=	debugfs_create_u16
+EXPORT_SYMS+=	debugfs_create_u32
+EXPORT_SYMS+=	debugfs_create_u64
+EXPORT_SYMS+=	debugfs_create_ulong
+EXPORT_SYMS+=	debugfs_create_x8
+EXPORT_SYMS+=	debugfs_create_x16
+EXPORT_SYMS+=	debugfs_create_x32
+EXPORT_SYMS+=	debugfs_create_x64
+EXPORT_SYMS+=	debugfs_remove
+EXPORT_SYMS+=	debugfs_remove_recursive
+
 .include <bsd.kmod.mk>