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s390/sysinfo: Add context analysis attributes

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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@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2026-08-03 19:21:41 +02:00 committed by Vasily Gorbik
parent 3f7c9f9c36
commit 1f45a8663a
1 changed files with 2 additions and 0 deletions
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2
arch/s390/kernel/sysinfo.c
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@ -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);
}