[PATCH 1/4] s390/sysinfo: Add context analysis attributes

[Heiko Carstens]

Add context analysis attributes to service_level_start() and
service_level_stop() to specify that those functions only
acquire or release a lock.

Addresses the following warnings:

arch/s390/kernel/sysinfo.c:331:1: warning: rw_semaphore 'service_level_sem' is still held at the end of function
arch/s390/kernel/sysinfo.c:329:2: note: rw_semaphore acquired here
  329 |         down_read(&service_level_sem);
arch/s390/kernel/sysinfo.c:340:2: warning: releasing rw_semaphore 'service_level_sem' that was not held
  340 |         up_read(&service_level_sem);

Signed-off-by: Heiko Carstens <hca@xxxxxxxxxxxxx>
---
 arch/s390/kernel/sysinfo.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c
index 33ca3e47a0e6..45b4f448fe3d 100644
--- a/arch/s390/kernel/sysinfo.c
+++ b/arch/s390/kernel/sysinfo.c
@@ -325,6 +325,7 @@ int unregister_service_level(struct service_level *slr)
 EXPORT_SYMBOL(unregister_service_level);
 
 static void *service_level_start(struct seq_file *m, loff_t *pos)
+__acquires_shared(service_level_sem)
 {
 	down_read(&service_level_sem);
 	return seq_list_start(&service_level_list, *pos);
@@ -336,6 +337,7 @@ static void *service_level_next(struct seq_file *m, void *p, loff_t *pos)
 }
 
 static void service_level_stop(struct seq_file *m, void *p)
+__releases_shared(service_level_sem)
 {
 	up_read(&service_level_sem);
 }
-- 
2.53.0