On Thu, 14 Aug 2014 16:46:22 +0530, Chetan Nanda said: > Hi, > > I am trying to enable 'CONFIG_DEBUG_SET_MODULE_RONX' config option on > 3.10 kernel (for ARM arch) via writing CONFIG_DEBUG_SET_MODULE_RONX=y > at the end of > board specific config file. > > But .config generated after kernel build do not have this option enabled. > > Do I need to enable any other option also before enabling this one? Go into 'make menuconfig', Enter a '/'. In the textbox, enter a substring of the symbol (I entered 'MODULE_RONX'). At least on x86_64, this shows me: x Symbol: DEBUG_SET_MODULE_RONX [=y] x x Type : boolean x x Prompt: Set loadable kernel module data as NX and text as RO x x Location: x x (1) -> Kernel hacking x x Defined at arch/x86/Kconfig.debug:112 x x Depends on: MODULES [=y] Perhaps it's different on ARM - seems pretty silly to enable MODULE_RONX if your kernel doesn't have CONFIG_MODULES=y in the build. But in general, you should *NOT* simply edit the config file, because that does *not* do any checking of select/depend as you make the change. Then when you actually make the kernel, it *will* re-drive the select/depend logic, and convert the provided .config to a self-consistent form. Of course, there is zero guarantee that the self-consistent form corresponds to your intentions....
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