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-rw-r--r--qapi/block-core.json3
1 files changed, 2 insertions, 1 deletions
diff --git a/qapi/block-core.json b/qapi/block-core.json
index 98a20d22f4..ac8f5f61d4 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -1961,7 +1961,8 @@
#
# @config: #optional filename of the configuration file
#
-# @align: #optional required alignment for requests in bytes
+# @align: #optional required alignment for requests in bytes,
+# must be power of 2, or 0 for default
#
# @inject-error: #optional array of error injection descriptions
#