diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/opal.h | 2 | ||||
| -rw-r--r-- | arch/powerpc/platforms/powernv/opal.c | 14 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h index fe2aa0b48d2b..6fb5f90e6464 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -892,6 +892,8 @@ 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 e92f2f67640f..7835d5bb973f 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) { |