lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sat, 29 Dec 2012 01:33:41 +0100
From:	Fabio Baltieri <>
To:	Larry Finger <>
Cc:	"Rafael J. Wysocki" <>,
	viresh kumar <>,, Linux PM list <>,
	LKML <>
Subject: Re: [PATCH] Fix problem with cpufreq_pndemand or cpufreq_conservative

On Fri, Dec 28, 2012 at 05:45:54PM -0600, Larry Finger wrote:
> >I wonder if that's avoidable?  The intention is not to create an additional
> >module, clearly.
> It appears not to be possible. I don't know enough about to kmake to
> understand why it is forcing a new module. Perhaps some expert knows
> what Kconfig or Makefile magic will prevent that.

kbuild is building an additional module just because the makefile is
adding the new objects in the obj-m list directly, as in:

obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND)     += cpufreq_ondemand.o cpufreq_governor.o
obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative.o cpufreq_governor.o

To build just two modules the Makefile would have to be modified [1]
into something into something like:

obj-$(CONFIG_CPU_FREQ_GOV_ONDEMAND)     += cpufreq_ondemand_mod.o
cpufreq_ondemand_mod-y                  := cpufreq_ondemand.o cpufreq_governor.o
obj-$(CONFIG_CPU_FREQ_GOV_CONSERVATIVE) += cpufreq_conservative_mod.o
cpufreq_conservative_mod-y              := cpufreq_conservative.o cpufreq_governor.o

so that only two .o are added to obj-m, but that's not correct either as
you end up with cpufreq_governor symbols exported twice.

I think the only way would be to force cpufreq_governor as builtin with
an automatic Kconfig option.



Fabio Baltieri
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

Powered by blists - more mailing lists