Documentation: teaching: lectures: smp: add ticket spinlock reference

Add reference to LWN ticket spinlock article. Signed-off-by: Octavian Purdila <tavi@cs.pub.ro>
thallett · Mar 30, 2020 · 823d8b0 · 823d8b0
1 parent d5d0dd8
commit 823d8b0
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/Documentation/teaching/lectures/smp.rst b/Documentation/teaching/lectures/smp.rst
@@ -665,7 +665,8 @@ reduce power consumption.
 
 A similar implementation with support for fairness (the CPU cores are
 allowed in the critical section based on the time of arrival) is used
-in the Linux kernel (the ticket spin lock) for many architectures.
+in the Linux kernel (the `ticket spin lock <https://lwn.net/Articles/267968/>`_)
+for many architectures.
 
 However, for the x86 architecture, the current spin lock
 implementation uses a queued spin lock where the CPU cores spin on