diff options
| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2014-03-29 08:38:41 +1100 |
|---|---|---|
| committer | Eli Qiao <taget@linux.vnet.ibm.com> | 2014-03-31 11:16:43 +0800 |
| commit | dfb70cdcb7d6a8fee3bb66ea3ac76a3557842e28 (patch) | |
| tree | 25b1fbf4ddbf312db11522fa423c6500af06894a | |
| parent | c7062d83fe7b9beaf4e848a2c92321f462ab54ae (diff) | |
| download | powerkvm-dfb70cdcb7d6a8fee3bb66ea3ac76a3557842e28.tar.gz | |
powerpc/powernv: Add opal_notifier_unregister() and export to modules
opal_notifier_register() is missing a pending "unregister" variant
and should be exposed to modules.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| -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 7bc3672df298d..81c8fa1c70c92 100644 --- a/arch/powerpc/include/asm/opal.h +++ b/arch/powerpc/include/asm/opal.h @@ -902,6 +902,8 @@ 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 b175c852ace4f..07403101cc794 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -194,6 +194,20 @@ 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) { |