conditional compile with AIO_SUPPORT

2 files changed, 40 insertions, 0 deletions

diff --git a/lib/device/dev-io.c b/lib/device/dev-io.c
index 25f241904..c8743f348 100644
--- a/lib/device/dev-io.c
+++ b/lib/device/dev-io.c
@@ -828,6 +828,8 @@ int dev_set(struct device *dev, uint64_t offset, size_t len, int value)
 	return (len == 0);
 }
 
+#ifdef AIO_SUPPORT
+
 /* io_setup() wrapper */
 
 struct dev_async_context *dev_async_context_setup(unsigned async_event_count)
@@ -961,3 +963,35 @@ int dev_async_getevents(struct dev_async_context *ac, int wait_count, struct tim
 	return 1;
 }
 
+#else /* AIO_SUPPORT */
+
+struct dev_async_context *dev_async_context_setup(unsigned async_event_count)
+{
+	return NULL;
+}
+
+struct dev_async_io *dev_async_io_alloc(int buf_len)
+{
+	return NULL;
+}
+
+void dev_async_context_destroy(struct dev_async_context *ac)
+{
+}
+
+void dev_async_io_destroy(struct dev_async_io *aio)
+{
+}
+
+int dev_async_read_submit(struct dev_async_context *ac, struct dev_async_io *aio,
+			  struct device *dev, uint32_t len, uint64_t offset, int *nospace)
+{
+	return 0;
+}
+
+int dev_async_getevents(struct dev_async_context *ac, int wait_count, struct timespec *timeout)
+{
+	return 0;
+}
+
+#endif /* AIO_SUPPORT */
diff --git a/tools/lvmcmdline.c b/tools/lvmcmdline.c
index 0f00d8bf2..8c2aa730c 100644
--- a/tools/lvmcmdline.c
+++ b/tools/lvmcmdline.c
@@ -2386,7 +2386,13 @@ static int _get_current_settings(struct cmd_context *cmd)
 	     !_merge_synonym(cmd, metadatacopies_ARG, vgmetadatacopies_ARG)))
 		return EINVALID_CMD_LINE;
 
+#ifdef AIO_SUPPORT
 	cmd->use_aio = find_config_tree_bool(cmd, metadata_scan_async_CFG, NULL);
+#else
+	cmd->use_aio = 0;
+	if (find_config_tree_bool(cmd, metadata_scan_async_CFG, NULL))
+		log_verbose("No async I/O support, ignoring metadata/scan_async.");
+#endif
 
 	/* Zero indicates success */
 	return 0;