Hi Srikar,
> The patch avoids allocating cpufreq_policy on stack hence fixing frame
> size overflow in 'powernv_cpufreq_reboot_notifier'
>
> ./drivers/cpufreq/powernv-cpufreq.c: In function
> _powernv_cpufreq_reboot_notifier_:
> ./drivers/cpufreq/powernv-cpufreq.c:906:1: error: the frame size of 2064
> bytes is larger than 2048 bytes [-Werror=frame-larger-than=]
> }
> ^
> cc1: all warnings being treated as errors
> make[3]: *** [./scripts/Makefile.build:316:
> drivers/cpufreq/powernv-cpufreq.o] Error 1
> make[2]: *** [./scripts/Makefile.build:556: drivers/cpufreq] Error 2
> make[1]: *** [./Makefile:1072: drivers] Error 2
> make[1]: *** Waiting for unfinished jobs....
> make: *** [Makefile:157: sub-make] Error 2
>
This looks a lot like commit d95fe371ecd2 ("cpufreq: powernv: Fix
frame-size-overflow in powernv_cpufreq_work_fn").
As with that patch, I have checked for matching puts/gets and that all
uses of '&' check out.
I tried to look at the snowpatch tests: they apparently reported a
checkpatch warning but the file has since disappeared so I can't see
what it was. Running checkpatch locally:
$ scripts/checkpatch.pl -g HEAD -strict
WARNING: Possible unwrapped commit description (prefer a maximum 75 chars per
line)
#15:
make[3]: *** [./scripts/Makefile.build:316: drivers/cpufreq/powernv-cpufreq.o]
Error 1
This is benign and you shouldn't wrap that line anyway.
On that basis:
Reviewed-by: Daniel Axtens <d...@axtens.net>
Kind regards,
Daniel
> Fixes: cf30af76 ("cpufreq: powernv: Set the cpus to nominal frequency during
> reboot/kexec")
> Cc: Pratik Rajesh Sampat <psam...@linux.ibm.com>
> Cc: Daniel Axtens <d...@axtens.net>
> Cc: Michael Ellerman <m...@ellerman.id.au>
> Cc: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
> Signed-off-by: Srikar Dronamraju <sri...@linux.vnet.ibm.com>
> ---
> drivers/cpufreq/powernv-cpufreq.c | 9 ++++++---
> 1 file changed, 6 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/cpufreq/powernv-cpufreq.c
> b/drivers/cpufreq/powernv-cpufreq.c
> index a9af15e..e439b43 100644
> --- a/drivers/cpufreq/powernv-cpufreq.c
> +++ b/drivers/cpufreq/powernv-cpufreq.c
> @@ -885,12 +885,15 @@ static int powernv_cpufreq_reboot_notifier(struct
> notifier_block *nb,
> unsigned long action, void *unused)
> {
> int cpu;
> - struct cpufreq_policy cpu_policy;
> + struct cpufreq_policy *cpu_policy;
>
> rebooting = true;
> for_each_online_cpu(cpu) {
> - cpufreq_get_policy(&cpu_policy, cpu);
> - powernv_cpufreq_target_index(&cpu_policy, get_nominal_index());
> + cpu_policy = cpufreq_cpu_get(cpu);
> + if (!cpu_policy)
> + continue;
> + powernv_cpufreq_target_index(cpu_policy, get_nominal_index());
> + cpufreq_cpu_put(cpu_policy);
> }
>
> return NOTIFY_DONE;
> --
> 1.8.3.1
