This patch adds the CONFIG_DEBUG_KEEP_INIT option which preserves the
.init.text section after initialization. Memory leaks happening during this
phase can be more easily tracked.

Signed-off-by: Catalin Marinas <[EMAIL PROTECTED]>
---

 include/linux/init.h |    5 +++++
 lib/Kconfig.debug    |   12 ++++++++++++
 2 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/include/linux/init.h b/include/linux/init.h
index 5a593a1..eecdb17 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -40,8 +40,13 @@
 
 /* These are for everybody (although not all archs will actually
    discard it in modules) */
+#ifdef CONFIG_DEBUG_KEEP_INIT
+#define __init
+#define __initdata
+#else
 #define __init         __attribute__ ((__section__ (".init.text")))
 #define __initdata     __attribute__ ((__section__ (".init.data")))
+#endif
 #define __exitdata     __attribute__ ((__section__(".exit.data")))
 #define __exit_call    __attribute_used__ __attribute__ ((__section__ 
(".exitcall.exit")))
 
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 42f60fb..9695af1 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -251,6 +251,18 @@ config DEBUG_MEMLEAK_REPORTS_NR
          reading the /sys/kernel/debug/memleak file could lead to
          some soft-locks.
 
+config DEBUG_KEEP_INIT
+       bool "Do not free the __init code/data"
+       default n
+       depends on DEBUG_MEMLEAK
+       help
+         This option moves the __init code/data out of the
+         .init.text/.init.data sections. It is useful for identifying
+         memory leaks happening during the kernel or modules
+         initialization.
+
+         If unsure, say N.
+
 config DEBUG_PREEMPT
        bool "Debug preemptible kernel"
        depends on DEBUG_KERNEL && PREEMPT && TRACE_IRQFLAGS_SUPPORT
-
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