X-Git-Url: http://git.liburcu.org/?p=urcu.git;a=blobdiff_plain;f=rculfhash.c;h=e8147178ada51bc333c27237ac806311c8bc08a0;hp=55f56ceb6bc54a248032d3e2ce94e2db1bfeb82b;hb=d95bd16028d250211f2e65cd583e422f4ecdf7d0;hpb=1b81fe1a14149b4c3f878b53e050a6ad5374a569

diff --git a/rculfhash.c b/rculfhash.c
index 55f56ce..e814717 100644
--- a/rculfhash.c
+++ b/rculfhash.c
@@ -53,6 +53,11 @@
 #define max(a, b)	((a) > (b) ? (a) : (b))
 #endif
 
+/*
+ * The removed flag needs to be updated atomically with the pointer.
+ * The dummy flag does not require to be updated atomically with the
+ * pointer, but it is added as a pointer low bit flag to save space.
+ */
 #define REMOVED_FLAG		(1UL << 0)
 #define DUMMY_FLAG		(1UL << 1)
 #define FLAGS_MASK		((1UL << 2) - 1)