From: Jessica Yu <jeyu@redhat.com>
Date: Wed, 23 Mar 2016 00:03:17 +0000 (-0400)
Subject: module: s390: keep mod_arch_specific for livepatch modules
X-Git-Tag: v4.7-rc1~152^2^3~4
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=f31e0960f395df0c9197de53674365e2a28a129b;p=linux.git

module: s390: keep mod_arch_specific for livepatch modules

Livepatch needs to utilize the symbol information contained in the
mod_arch_specific struct in order to be able to call the s390
apply_relocate_add() function to apply relocations. Keep a reference to
syminfo if the module is a livepatch module. Remove the redundant vfree()
in module_finalize() since module_arch_freeing_init() (which also frees
those structures) is called in do_init_module(). If the module isn't a
livepatch module, we free the structures in module_arch_freeing_init() as
usual.

Signed-off-by: Jessica Yu <jeyu@redhat.com>
Reviewed-by: Miroslav Benes <mbenes@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
---

diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index 7873e171457c..fbc07891f9e7 100644
--- a/arch/s390/kernel/module.c
+++ b/arch/s390/kernel/module.c
@@ -51,6 +51,10 @@ void *module_alloc(unsigned long size)
 
 void module_arch_freeing_init(struct module *mod)
 {
+	if (is_livepatch_module(mod) &&
+	    mod->state == MODULE_STATE_LIVE)
+		return;
+
 	vfree(mod->arch.syminfo);
 	mod->arch.syminfo = NULL;
 }
@@ -425,7 +429,5 @@ int module_finalize(const Elf_Ehdr *hdr,
 		    struct module *me)
 {
 	jump_label_apply_nops(me);
-	vfree(me->arch.syminfo);
-	me->arch.syminfo = NULL;
 	return 0;
 }