linux-kernel - Re: [PATCH v3 2/9] kbuild: Support for Symbols.list creation

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Date:   Thu, 11 Apr 2019 11:18:32 -0400
From:   Joe Lawrence <joe.lawrence@...hat.com>
To:     Artem Savkov <asavkov@...hat.com>
Cc:     linux-kernel@...r.kernel.org, live-patching@...r.kernel.org,
        linux-kbuild@...r.kernel.org, Jessica Yu <jeyu@...nel.org>,
        Jiri Kosina <jikos@...nel.org>,
        Joao Moreira <jmoreira@...e.de>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michael Matz <matz@...e.de>, Miroslav Benes <mbenes@...e.cz>,
        Nicolai Stange <nstange@...e.de>,
        Petr Mladek <pmladek@...e.com>
Subject: Re: [PATCH v3 2/9] kbuild: Support for Symbols.list creation

On 4/11/19 5:18 AM, Artem Savkov wrote:
> On Wed, Apr 10, 2019 at 11:50:51AM -0400, Joe Lawrence wrote:
>> -clean: archclean vmlinuxclean
>> +klpclean:
>> +	$(Q) rm -f $(objtree)/Symbols.list
> 
> nit: $(SLIST) can be used here.
> 
>> +clean: archclean vmlinuxclean klpclean
>>   
>>   # mrproper - Delete all generated files, including .config
>>   #
>> diff --git a/samples/livepatch/Makefile b/samples/livepatch/Makefile
>> index 2472ce39a18d..8b9b42a258ad 100644
>> --- a/samples/livepatch/Makefile
>> +++ b/samples/livepatch/Makefile
>> @@ -1,3 +1,4 @@
>> +LIVEPATCH_livepatch-sample := y
>>   obj-$(CONFIG_SAMPLE_LIVEPATCH) += livepatch-sample.o
>>   obj-$(CONFIG_SAMPLE_LIVEPATCH) += livepatch-shadow-mod.o
>>   obj-$(CONFIG_SAMPLE_LIVEPATCH) += livepatch-shadow-fix1.o
>> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
>> index 76ca30cc4791..ca76bd2080f0 100644
>> --- a/scripts/Makefile.build
>> +++ b/scripts/Makefile.build
>> @@ -246,6 +246,11 @@ cmd_gen_ksymdeps = \
>>   	$(CONFIG_SHELL) $(srctree)/scripts/gen_ksymdeps.sh $@ >> $(dot-target).cmd
>>   endif
>>   
>> +ifdef CONFIG_LIVEPATCH
>> +cmd_livepatch = $(if $(LIVEPATCH_$(basetarget)),		\
>> +	$(shell touch $(MODVERDIR)/$(basetarget).livepatch))
>> +endif
>> +
>>   define rule_cc_o_c
>>   	$(call cmd,checksrc)
>>   	$(call cmd_and_fixdep,cc_o_c)
>> @@ -280,6 +285,7 @@ $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
>>   $(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) $(objtool_dep) FORCE
>>   	$(call cmd,force_checksrc)
>>   	$(call if_changed_rule,cc_o_c)
>> +	$(call cmd_livepatch)
> 
> nit: maybe use "cmd,livepatch" to be consistent with the other call of
> this function.
> 

Both of these make sense, thanks Artem.

-- Joe