kbuild: remove CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX

CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX was selected by BLACKFIN, METAG.
They were removed by commit 4ba66a976072 ("arch: remove blackfin port"),
commit bb6fb6dfcc17 ("metag: Remove arch/metag/"), respectively.

No more architecture enables CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX.
Clean up the rest of scripts, and remove the Kconfig entry.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>

3 files changed, 1 insertions, 15 deletions

diff --git a/arch/Kconfig b/arch/Kconfig
index 8e0d665c8d53..706dec4d295a 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -686,12 +686,6 @@ config MODULES_USE_ELF_REL
           Modules only use ELF REL relocations.  Modules with ELF RELA
           relocations will give an error.
 
-config HAVE_UNDERSCORE_SYMBOL_PREFIX
-        bool
-        help
-          Some architectures generate an _ in front of C symbols; things like
-          module loading and assembly files need to know about this.
-
 config HAVE_IRQ_EXIT_ON_IRQ_STACK
         bool
         help
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 22df8d037cf2..753b9add56f5 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -485,15 +485,10 @@ targets += $(lib-target)
 
 dummy-object = $(obj)/.lib_exports.o
 ksyms-lds = $(dot-target).lds
-ifdef CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
-ref_prefix = EXTERN(_
-else
-ref_prefix = EXTERN(
-endif
 
 quiet_cmd_export_list = EXPORTS $@
 cmd_export_list = $(OBJDUMP) -h $< | \
-        sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/$(ref_prefix)\1)/p' >$(ksyms-lds);\
+        sed -ne '/___ksymtab/s/.*+\([^ ]*\).*/EXTERN(\1)/p' >$(ksyms-lds);\
         rm -f $(dummy-object);\
         echo | $(CC) $(a_flags) -c -o $(dummy-object) -x assembler -;\
         $(LD) $(ld_flags) -r -o $@ -T $(ksyms-lds) $(dummy-object);\
diff --git a/scripts/adjust_autoksyms.sh b/scripts/adjust_autoksyms.sh
index 016b3c48a4ec..6e6d63957da3 100755
--- a/scripts/adjust_autoksyms.sh
+++ b/scripts/adjust_autoksyms.sh
@@ -61,9 +61,6 @@ for mod in "$MODVERDIR"/*.mod; do
         sed -n -e '3{s/ /\n/g;/^$/!p;}' "$mod"
 done | sort -u |
 while read sym; do
-        if [ -n "$CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX" ]; then
-                sym="${sym#_}"
-        fi
         echo "#define __KSYM_${sym} 1"
 done >> "$new_ksyms_file"