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Merge tag 'modules-for-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux

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Pull modules updates from Jessica Yu:
 "Summary of modules changes for the 5.5 merge window:

   - Refactor include/linux/export.h and remove code duplication between
     EXPORT_SYMBOL and EXPORT_SYMBOL_NS to make it more readable.

     The most notable change is that no namespace is represented by an
     empty string "" rather than NULL.

   - Fix a module load/unload race where waiter(s) trying to load the
     same module weren't being woken up when a module finally goes away"

* tag 'modules-for-v5.5' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  kernel/module.c: wakeup processes in module_wq on module unload
  moduleparam: fix parameter description mismatch
  export: avoid code duplication in include/linux/export.h
This commit is contained in:
Linus Torvalds
2019-12-05 12:27:16 -08:00
parent 25cfb0c7de 5d60331161
commit 0f13741624
3 changed files with 33 additions and 66 deletions
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4
kernel/module.c
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@@ -1033,6 +1033,8 @@ SYSCALL_DEFINE2(delete_module, const char __user *, name_user,
strlcpy(last_unloaded_module, mod->name, sizeof(last_unloaded_module));
free_module(mod);
/* someone could wait for the module in add_unformed_module() */
wake_up_all(&module_wq);
return 0;
out:
mutex_unlock(&module_mutex);
@@ -1400,7 +1402,7 @@ static int verify_namespace_is_imported(const struct load_info *info,
char *imported_namespace;
namespace = kernel_symbol_namespace(sym);
if (namespace) {
if (namespace && namespace[0]) {
imported_namespace = get_modinfo(info, "import_ns");
while (imported_namespace) {
if (strcmp(namespace, imported_namespace) == 0)