[PATCH 6/6] modpost: respect the previous export when 'exported twice' is warned

From: Masahiro Yamada
Date: Thu Nov 14 2019 - 12:42:42 EST


When 'exported twice' is warned, let sym_add_exported() return without
updating the symbol info. This respects the previous export, which is
ordered first in modules.order

This simplifies the code too.

Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
---

scripts/mod/modpost.c | 26 +++++++++++---------------
1 file changed, 11 insertions(+), 15 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 06086105011f..d9a92fbe1146 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -211,13 +211,11 @@ static struct symbol *new_symbol(const char *name, struct module *module,
enum export export)
{
unsigned int hash;
- struct symbol *new;

hash = tdb_hash(name) % SYMBOL_HASH_SIZE;
- new = symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]);
- new->module = module;
- new->export = export;
- return new;
+ symbolhash[hash] = alloc_symbol(name, 0, symbolhash[hash]);
+
+ return symbolhash[hash];
}

static struct symbol *find_symbol(const char *name)
@@ -392,17 +390,15 @@ static struct symbol *sym_add_exported(const char *name, struct module *mod,

if (!s) {
s = new_symbol(name, mod, export);
- } else {
- if (!external_module || is_vmlinux(s->module->name) ||
- s->module == mod) {
- warn("%s: '%s' exported twice. Previous export was in %s%s\n",
- mod->name, name, s->module->name,
- is_vmlinux(s->module->name) ? "" : ".ko");
- } else {
- /* In case Module.symvers was out of date */
- s->module = mod;
- }
+ } else if (!external_module || is_vmlinux(s->module->name) ||
+ s->module == mod) {
+ warn("%s: '%s' exported twice. Previous export was in %s%s\n",
+ mod->name, name, s->module->name,
+ is_vmlinux(s->module->name) ? "" : ".ko");
+ return s;
}
+
+ s->module = mod;
s->vmlinux = is_vmlinux(mod->name);
s->kernel = 0;
s->export = export;
--
2.17.1