Make release master support optional

Introduces CONFIG_RELEASE_MASTER and makes release
master support dependent on the new symbol. This is
useful because dedicated interrupt handling only applies
to "large" multicore platforms. This will allow us to
not implement smp_send_pull_timers() for all platforms.

1 files changed, 12 insertions, 2 deletions

diff --git a/litmus/litmus.c b/litmus/litmus.c
index b71fc819eb51..c60423228607 100644
--- a/litmus/litmus.c
+++ b/litmus/litmus.c
@@ -30,8 +30,10 @@ atomic_t cannot_use_plugin	= ATOMIC_INIT(0);
 /* Give log messages sequential IDs. */
 atomic_t __log_seq_no = ATOMIC_INIT(0);
 
+#ifdef CONFIG_RELEASE_MASTER
 /* current master CPU for handling timer IRQs */
 atomic_t release_master_cpu = ATOMIC_INIT(NO_CPU);
+#endif
 
 static struct kmem_cache * bheap_node_cache;
 extern struct kmem_cache * release_heap_cache;
@@ -627,6 +629,7 @@ static int proc_write_cluster_size(struct file *file,
         return len;
 }
 
+#ifdef CONFIG_RELEASE_MASTER
 static int proc_read_release_master(char *page, char **start,
                                     off_t off, int count,
                                     int *eof, void *data)
@@ -676,13 +679,16 @@ static int proc_write_release_master(struct file *file,
                 }
         }
 }
+#endif
 
 static struct proc_dir_entry *litmus_dir = NULL,
         *curr_file = NULL,
         *stat_file = NULL,
         *plugs_file = NULL,
-        *clus_cache_idx_file = NULL,
-        *release_master_file = NULL;
+#ifdef CONFIG_RELEASE_MASTER
+        *release_master_file = NULL,
+#endif
+        *clus_cache_idx_file = NULL;
 
 static int __init init_litmus_proc(void)
 {
@@ -702,6 +708,7 @@ static int __init init_litmus_proc(void)
         curr_file->read_proc  = proc_read_curr;
         curr_file->write_proc = proc_write_curr;
 
+#ifdef CONFIG_RELEASE_MASTER
         release_master_file = create_proc_entry("release_master",
                                                 0644, litmus_dir);
         if (!release_master_file) {
@@ -711,6 +718,7 @@ static int __init init_litmus_proc(void)
         }
         release_master_file->read_proc = proc_read_release_master;
         release_master_file->write_proc  = proc_write_release_master;
+#endif
 
         clus_cache_idx_file = create_proc_entry("cluster_cache",
                                                 0644, litmus_dir);
@@ -741,8 +749,10 @@ static void exit_litmus_proc(void)
                 remove_proc_entry("active_plugin", litmus_dir);
         if (clus_cache_idx_file)
                 remove_proc_entry("cluster_cache", litmus_dir);
+#ifdef CONFIG_RELEASE_MASTER
         if (release_master_file)
                 remove_proc_entry("release_master", litmus_dir);
+#endif
         if (litmus_dir)
                 remove_proc_entry("litmus", NULL);
 }