From 0bfd830f3ce85a64137488038f73cc16b59f24f2 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jeremy@system76.com>
Date: Mon, 20 Apr 2020 21:08:56 -0600
Subject: [PATCH] Work around spurious nanosleep wakes

---
 src/syscall/time.rs | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/syscall/time.rs b/src/syscall/time.rs
index 4384d12..5fc089e 100644
--- a/src/syscall/time.rs
+++ b/src/syscall/time.rs
@@ -32,7 +32,19 @@ pub fn nanosleep(req: &TimeSpec, rem_opt: Option<&mut TimeSpec>) -> Result<usize
         context.block("nanosleep");
     }
 
-    unsafe { context::switch(); }
+    //TODO: Find out wake reason
+    loop {
+        unsafe { context::switch(); }
+
+        let contexts = context::contexts();
+        let context_lock = contexts.current().ok_or(Error::new(ESRCH))?;
+        let mut context = context_lock.write();
+        if context.wake.is_some() {
+            context.block("nanosleep spurious");
+        } else {
+            break;
+        }
+    }
 
     if let Some(rem) = rem_opt {
         let current = time::monotonic();