modules: add default loader hook implementations

The module loader code allows architectures to hook into the code by
providing a small number of entry points that each arch must implement.
This patch provides __weakly linked generic implementations of these
entry points for architectures that don't need to do anything special.

Signed-off-by: Jonas Bonn <jonas@southpole.se>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

1 files changed, 6 insertions, 1 deletions

diff --git a/include/linux/moduleloader.h b/include/linux/moduleloader.h
index c1f40c2f7ffb..b2be02ebf453 100644
--- a/include/linux/moduleloader.h
+++ b/include/linux/moduleloader.h
@@ -5,7 +5,12 @@
 #include <linux/module.h>
 #include <linux/elf.h>
 
-/* These must be implemented by the specific architecture */
+/* These may be implemented by architectures that need to hook into the
+ * module loader code.  Architectures that don't need to do anything special
+ * can just rely on the 'weak' default hooks defined in kernel/module.c.
+ * Note, however, that at least one of apply_relocate or apply_relocate_add
+ * must be implemented by each architecture.
+ */
 
 /* Adjust arch-specific sections.  Return 0 on success.  */
 int module_frob_arch_sections(Elf_Ehdr *hdr,