opal_notifier_register() is missing a pending "unregister" variant
and should be exposed to modules.
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
arch/powerpc/include/asm/opal.h | 2 ++
arch/powerpc/platforms/powernv/opal.c | 14 ++++++++++++++
2 files changed, 16 insertions(+)
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index ffafab0..1dd3f9b 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -891,6 +891,8 @@ extern int early_init_dt_scan_opal(unsigned long node,
const char *uname,
int depth, void *data);
extern int opal_notifier_register(struct notifier_block *nb);
+extern int opal_notifier_unregister(struct notifier_block *nb);
+
extern int opal_message_notifier_register(enum OpalMessageType msg_type,
struct notifier_block *nb);
extern void opal_notifier_enable(void);
diff --git a/arch/powerpc/platforms/powernv/opal.c
b/arch/powerpc/platforms/powernv/opal.c
index e92f2f6..7835d5b 100644
--- a/arch/powerpc/platforms/powernv/opal.c
+++ b/arch/powerpc/platforms/powernv/opal.c
@@ -180,6 +180,20 @@ int opal_notifier_register(struct notifier_block *nb)
atomic_notifier_chain_register(&opal_notifier_head, nb);
return 0;
}
+EXPORT_SYMBOL_GPL(opal_notifier_register);
+
+int opal_notifier_unregister(struct notifier_block *nb)
+{
+ if (!nb) {
+ pr_warning("%s: Invalid argument (%p)\n",
+ __func__, nb);
+ return -EINVAL;
+ }
+
+ atomic_notifier_chain_unregister(&opal_notifier_head, nb);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(opal_notifier_unregister);
static void opal_do_notifier(uint64_t events)
{
--
1.8.3.2
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