kbuild: explain why DEBUG_SECTION_MISMATCH is UNDEFINED

We started to see patches enabling this - so explain why
it is disabled and the condition to enable it again.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index a370fe8..ab408aa 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -82,6 +82,9 @@ config HEADERS_CHECK
 config DEBUG_SECTION_MISMATCH
        bool "Enable full Section mismatch analysis"
        depends on UNDEFINED
+       # This option is on purpose disabled for now.
+       # It will be enabled when we are down to a resonable number
+       # of section mismatch warnings (< 10 for an allyesconfig build)
        help
          The section mismatch analysis checks if there are illegal
          references from one section to another section.