[RFC 09/12] powerpc/pseries: Disable context analysis for the CMM hotplug notifier

[Ritesh Harjani (IBM)]

Clang's context analysis reports:
  cmm.c: error: mutex 'hotplug_mutex' is still held at the end of function [-Werror,-Wthread-safety-analysis]
  cmm.c: error: releasing mutex 'hotplug_mutex' that was not held [-Werror,-Wthread-safety-analysis]

cmm_memory_cb() takes hotplug_mutex on MEM_GOING_OFFLINE and drops it
on a later MEM_OFFLINE or MEM_CANCEL_OFFLINE call.

Add __context_unsafe() annotation for cmm_memory_cb() callback to avoid
the reported build error in order to enable Clang context analysis.

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@xxxxxxxxx>
---
 arch/powerpc/platforms/pseries/cmm.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 38e22125b96f..159efe734785 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -470,6 +470,7 @@ static struct notifier_block cmm_reboot_nb = {
  **/
 static int cmm_memory_cb(struct notifier_block *self,
 			unsigned long action, void *arg)
+		__context_unsafe(/* Conditional locking */)
 {
 	switch (action) {
 	case MEM_GOING_OFFLINE:
-- 
2.39.5