log: update the comment for log_msg_ret()

Add some advice on string size here.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/include/log.h b/include/log.h
index df497ba..8a7b961 100644 (file)
--- a/include/log.h
+++ b/include/log.h
@@ -322,7 +322,10 @@ void __assert_fail(const char *assertion, const char *file, unsigned int line,
  *
  * or:
  *
- *     return log_msg_ret("fred failed", fred_call());
+ *     return log_msg_ret("get", fred_call());
+ *
+ * It is recommended to use <= 3 characters for the name since this will only
+ * use 4 bytes in rodata
  */
 #define log_ret(_ret) ({ \
        int __ret = (_ret); \