module: make MODULE_SYMBOL_PREFIX into a CONFIG option

The next commit will require the use of MODULE_SYMBOL_PREFIX in
.tmp_exports-asm.S.  Currently it is mixed in with C structure
definitions in "asm/module.h".  Move the definition of this arch option
into Kconfig, so it can be easily accessed by any code.

This also lets modpost.c use the same definition.  Previously modpost
relied on a hardcoded list of architectures in mk_elfconfig.c.

A build test for blackfin, one of the two MODULE_SYMBOL_PREFIX archs,
showed the generated code was unchanged.  vmlinux was identical save
for build ids, and an apparently randomized suffix on a single "__key"
symbol in the kallsyms data).

Signed-off-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk>
Acked-by: Mike Frysinger <vapier@gentoo.org> (blackfin)
CC: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 0 insertions, 9 deletions

diff --git a/scripts/mod/mk_elfconfig.c b/scripts/mod/mk_elfconfig.c
index 6a96d47bd1e6..639bca7ba559 100644
--- a/scripts/mod/mk_elfconfig.c
+++ b/scripts/mod/mk_elfconfig.c
@@ -9,9 +9,6 @@ main(int argc, char **argv)
         unsigned char ei[EI_NIDENT];
         union { short s; char c[2]; } endian_test;
 
-        if (argc != 2) {
-                fprintf(stderr, "Error: no arch\n");
-        }
         if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
                 fprintf(stderr, "Error: input truncated\n");
                 return 1;
@@ -55,12 +52,6 @@ main(int argc, char **argv)
         else
                 exit(1);
 
-        if ((strcmp(argv[1], "h8300") == 0)
-            || (strcmp(argv[1], "blackfin") == 0))
-                printf("#define MODULE_SYMBOL_PREFIX \"_\"\n");
-        else
-                printf("#define MODULE_SYMBOL_PREFIX \"\"\n");
-
         return 0;
 }