lualoader: Add primitive hook module, use it to untangle bogus reference

See: comments in the hook module about intended usage, as well as the
introduced use for config.reloaded.

Use the newly introduced hook module to define a "config.reloaded" hook.
This is currently used to register core's clearKernelCache as a reload hook
to avoid a circular dependency and fix this functionality- it didn't
actually work out, and it isn't immediately obvious how it slipped into src.

Other hook types will be introduced into the core lualoader as useful hook
points are identified.

1 files changed, 4 insertions, 1 deletions

diff --git a/stand/lua/core.lua b/stand/lua/core.lua
index 87146590cd79..d38822deab5f 100644
--- a/stand/lua/core.lua
+++ b/stand/lua/core.lua
@@ -30,6 +30,7 @@
 --
 
 local config = require("config")
+local hook = require("hook")
 
 local core = {}
 
@@ -138,7 +139,7 @@ function core.setSafeMode(safe_mode)
 	core.sm = safe_mode
 end
 
-function core.configReloaded()
+function core.clearCachedKernels()
 	-- Clear the kernel cache on config changes, autodetect might have
 	-- changed or if we've switched boot environments then we could have
 	-- a new kernel set.
@@ -364,4 +365,6 @@ end
 if core.isSystem386() and core.getACPIPresent(false) then
 	core.setACPI(true)
 end
+
+hook.register("config.reloaded", core.clearCachedKernels)
 return core