linux/export: Fix alignment for 64-bit ksymtab entries

An alignment of 4 bytes is wrong for 64-bit platforms which don't define
CONFIG_HAVE_ARCH_PREL32_RELOCATIONS (which then store 64-bit pointers).
Fix their alignment to 8 bytes.

Fixes: ddb5cdb ("kbuild: generate KSYMTAB entries by modpost")
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

Author: hdeller

include/linux/export-internal.h

@@ -16,10 +16,13 @@
  * and eliminates the need for absolute relocations that require runtime
  * processing on relocatable kernels.
  */
+#define __KSYM_ALIGN		".balign 4"
 #define __KSYM_REF(sym)		".long " #sym "- ."
 #elif defined(CONFIG_64BIT)
+#define __KSYM_ALIGN		".balign 8"
 #define __KSYM_REF(sym)		".quad " #sym
 #else
+#define __KSYM_ALIGN		".balign 4"
 #define __KSYM_REF(sym)		".long " #sym
 #endif
 
@@ -42,7 +45,7 @@
 	    "	.asciz \"" ns "\""					"\n"	\
 	    "	.previous"						"\n"	\
 	    "	.section \"___ksymtab" sec "+" #name "\", \"a\""	"\n"	\
-	    "	.balign	4"						"\n"	\
+		__KSYM_ALIGN						"\n"	\
 	    "__ksymtab_" #name ":"					"\n"	\
 		__KSYM_REF(sym)						"\n"	\
 		__KSYM_REF(__kstrtab_ ##name)				"\n"	\