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Subject[PATCH] markers: let marker_debug as module parameter

if we want to enable marker debug output, we have to modify
the code and remake/reinstall the kernel in current code.

this patch enable marker_debug to be set when kernel start.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/kernel/marker.c b/kernel/marker.c
index 9f76c4a..5d8404f 100644
--- a/kernel/marker.c
+++ b/kernel/marker.c
@@ -28,8 +28,9 @@
extern struct marker __start___markers[];
extern struct marker __stop___markers[];

-/* Set to 1 to enable marker debug output */
-static const int marker_debug;
+static int marker_debug;
+module_param(marker_debug, bool, 0);
+MODULE_PARM_DESC(marker_debug, "Set to 1 to enable marker debug output");

/*
* markers_mutex nests inside module_mutex. Markers mutex protects the builtin



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