On 03/24/2014 01:35 PM, Viresh Kumar wrote: > Whenever we change the frequency of a CPU, we call the PRECHANGE and POSTCHANGE > notifiers. They must be serialized, i.e. PRECHANGE and POSTCHANGE notifiers > should strictly alternate, thereby preventing two different sets of PRECHANGE or > POSTCHANGE notifiers from interleaving arbitrarily. > > The following examples illustrate why this is important: [...] > This patchset introduces a new set of routines cpufreq_freq_transition_begin() > and cpufreq_freq_transition_end(), which will guarantee that calls to frequency > transition routines are serialized. Later patches force other drivers to use > these new routines. > All the patches in this version look good to me. Reviewed-by: Srivatsa S. Bhat <srivatsa.bhat@xxxxxxxxxxxxxxxxxx> Regards, Srivatsa S. Bhat > > V4: https://lkml.org/lkml/2014/3/21/23 > > V4->V5: > - Replaced false with 0 as the variable was of int type instead of bool. > - There were some discussions about requirement of a barrier, but it looks like > overkill for now. So, leaving that unless we have a real problem. > > Srivatsa S. Bhat (1): > cpufreq: Make sure frequency transitions are serialized > > Viresh Kumar (2): > cpufreq: Convert existing drivers to use > cpufreq_freq_transition_{begin|end} > cpufreq: Make cpufreq_notify_transition & > cpufreq_notify_post_transition static > > drivers/cpufreq/cpufreq-nforce2.c | 4 +-- > drivers/cpufreq/cpufreq.c | 52 +++++++++++++++++++++++++++++------- > drivers/cpufreq/exynos5440-cpufreq.c | 4 +-- > drivers/cpufreq/gx-suspmod.c | 4 +-- > drivers/cpufreq/integrator-cpufreq.c | 4 +-- > drivers/cpufreq/longhaul.c | 4 +-- > drivers/cpufreq/pcc-cpufreq.c | 4 +-- > drivers/cpufreq/powernow-k6.c | 4 +-- > drivers/cpufreq/powernow-k7.c | 4 +-- > drivers/cpufreq/powernow-k8.c | 4 +-- > drivers/cpufreq/s3c24xx-cpufreq.c | 4 +-- > drivers/cpufreq/sh-cpufreq.c | 4 +-- > drivers/cpufreq/unicore2-cpufreq.c | 4 +-- > include/linux/cpufreq.h | 12 ++++++--- > 14 files changed, 76 insertions(+), 36 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
