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authorJessica Yu <jeyu@redhat.com>2016-08-17 20:58:28 -0400
committerJiri Kosina <jkosina@suse.cz>2016-08-18 23:41:55 +0200
commit255e732c61dbb6a0bf9e0a3d6bc45f202853c880 (patch)
tree809fd1b54c971df21bc2e3929376ba9887eefafa /kernel/livepatch
parent694d0d0bb2030d2e36df73e2d23d5770511dbc8d (diff)
downloadlinux-255e732c61dbb6a0bf9e0a3d6bc45f202853c880.tar.bz2
livepatch: use arch_klp_init_object_loaded() to finish arch-specific tasks
Introduce arch_klp_init_object_loaded() to complete any additional arch-specific tasks during patching. Architecture code may override this function. Signed-off-by: Jessica Yu <jeyu@redhat.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Acked-by: Miroslav Benes <mbenes@suse.cz> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'kernel/livepatch')
-rw-r--r--kernel/livepatch/core.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/kernel/livepatch/core.c b/kernel/livepatch/core.c
index 8bbe50704621..5fbabe022286 100644
--- a/kernel/livepatch/core.c
+++ b/kernel/livepatch/core.c
@@ -274,7 +274,6 @@ static int klp_write_object_relocations(struct module *pmod,
objname = klp_is_module(obj) ? obj->name : "vmlinux";
- module_disable_ro(pmod);
/* For each klp relocation section */
for (i = 1; i < pmod->klp_info->hdr.e_shnum; i++) {
sec = pmod->klp_info->sechdrs + i;
@@ -309,7 +308,6 @@ static int klp_write_object_relocations(struct module *pmod,
break;
}
- module_enable_ro(pmod, true);
return ret;
}
@@ -763,6 +761,12 @@ static int klp_init_func(struct klp_object *obj, struct klp_func *func)
func->old_sympos ? func->old_sympos : 1);
}
+/* Arches may override this to finish any remaining arch-specific tasks */
+void __weak arch_klp_init_object_loaded(struct klp_patch *patch,
+ struct klp_object *obj)
+{
+}
+
/* parts of the initialization that is done only when the object is loaded */
static int klp_init_object_loaded(struct klp_patch *patch,
struct klp_object *obj)
@@ -770,9 +774,15 @@ static int klp_init_object_loaded(struct klp_patch *patch,
struct klp_func *func;
int ret;
+ module_disable_ro(patch->mod);
ret = klp_write_object_relocations(patch->mod, obj);
- if (ret)
+ if (ret) {
+ module_enable_ro(patch->mod, true);
return ret;
+ }
+
+ arch_klp_init_object_loaded(patch, obj);
+ module_enable_ro(patch->mod, true);
klp_for_each_func(obj, func) {
ret = klp_find_object_symbol(obj->name, func->old_name,