2 files changed, 7 insertions, 0 deletions

diff --git a/include/applets.h b/include/applets.h
index a8b480b80..0bb257b6d 100644
--- a/include/applets.h
+++ b/include/applets.h
@@ -219,6 +219,7 @@ USE_PRINTF(APPLET(printf, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_PS(APPLET(ps, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_PWD(APPLET(pwd, _BB_DIR_BIN, _BB_SUID_NEVER))
 USE_RDATE(APPLET(rdate, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
+USE_READAHEAD(APPLET(readahead, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_READLINK(APPLET(readlink, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
 USE_READPROFILE(APPLET(readprofile, _BB_DIR_USR_SBIN, _BB_SUID_NEVER))
 USE_REALPATH(APPLET(realpath, _BB_DIR_USR_BIN, _BB_SUID_NEVER))
diff --git a/include/usage.h b/include/usage.h
index 5bc82dc22..ced9f68c7 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -2385,6 +2385,12 @@ USE_FEATURE_MDEV_CONFIG( \
         "\t-s\tSet the system date and time (default)\n" \
         "\t-p\tPrint the date and time"
 
+#define readahead_trivial_usage \
+        "[FILE]..."
+#define readahead_full_usage \
+        "Preloads FILE(s) in RAM cache so that subsequent reads for those" \
+        "files do not block on disk I/O."
+
 #ifdef CONFIG_FEATURE_READLINK_FOLLOW
 #define USAGE_READLINK_FOLLOW(a) a
 #else