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modpost: introduce module_alias_printf() helper

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The generic ->do_entry() handler is currently limited to returning
a single alias string.

However, this is not flexible enough for several subsystems, which
currently require their own implementations:

 - do_usb_table()
 - do_of_table()
 - do_pnp_device_entry()
 - do_pnp_card_entries()

This commit introduces a helper function so that these special cases can
add multiple MODULE_ALIAS() and then migrate to the generic framework.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
This commit is contained in:
Masahiro Yamada
2024-11-20 08:56:41 +09:00
parent b7bca42d10
commit f4fdb17ca5
3 changed files with 93 additions and 28 deletions
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11
scripts/mod/modpost.c
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@@ -176,6 +176,7 @@ static struct module *new_module(const char *name, size_t namelen)
INIT_LIST_HEAD(&mod->unresolved_symbols);
INIT_LIST_HEAD(&mod->missing_namespaces);
INIT_LIST_HEAD(&mod->imported_namespaces);
INIT_LIST_HEAD(&mod->aliases);
memcpy(mod->name, name, namelen);
mod->name[namelen] = '\0';
@@ -1966,6 +1967,7 @@ static void write_vmlinux_export_c_file(struct module *mod)
static void write_mod_c_file(struct module *mod)
{
struct buffer buf = { };
struct module_alias *alias, *next;
char fname[PATH_MAX];
int ret;
@@ -1973,7 +1975,14 @@ static void write_mod_c_file(struct module *mod)
add_exported_symbols(&buf, mod);
add_versions(&buf, mod);
add_depends(&buf, mod);
add_moddevtable(&buf, mod);
buf_printf(&buf, "\n");
list_for_each_entry_safe(alias, next, &mod->aliases, node) {
buf_printf(&buf, "MODULE_ALIAS(\"%s\");\n", alias->str);
list_del(&alias->node);
free(alias);
}
add_srcversion(&buf, mod);
ret = snprintf(fname, sizeof(fname), "%s.mod.c", mod->name);