[PATCH v5 3/6] module: s390: keep mod_arch_specific for livepatch modules

Jessica Yu
2016-03-16T19:47:05Z

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>
---
arch/s390/kernel/module.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/s390/kernel/module.c b/arch/s390/kernel/module.c
index 7873e17..fbc0789 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;
}
--
2.4.3