Export IRQ count to control page

Also add some compile-time checks to detect unexpected offsets.

1 files changed, 11 insertions, 0 deletions

diff --git a/litmus/ctrldev.c b/litmus/ctrldev.c
index 9969ab17c190..41919b2714cb 100644
--- a/litmus/ctrldev.c
+++ b/litmus/ctrldev.c
@@ -133,6 +133,17 @@ static int __init init_litmus_ctrl_dev(void)
 
         BUILD_BUG_ON(sizeof(struct control_page) > PAGE_SIZE);
 
+        BUILD_BUG_ON(sizeof(union np_flag) != sizeof(uint64_t));
+
+        BUILD_BUG_ON(offsetof(struct control_page, sched.raw)
+                     != LITMUS_CP_OFFSET_SCHED);
+        BUILD_BUG_ON(offsetof(struct control_page, irq_count)
+                     != LITMUS_CP_OFFSET_IRQ_COUNT);
+        BUILD_BUG_ON(offsetof(struct control_page, ts_syscall_start)
+                     != LITMUS_CP_OFFSET_TS_SC_START);
+        BUILD_BUG_ON(offsetof(struct control_page, irq_syscall_start)
+                     != LITMUS_CP_OFFSET_IRQ_SC_START);
+
         printk("Initializing LITMUS^RT control device.\n");
         err = misc_register(&litmus_ctrl_dev);
         if (err)