As everyone should know by now, we want to integrate the cpuidle
governor with the scheduler for a more efficient idling of CPUs.
In order to help the transition, this small patch series moves the
existing interaction with cpuidle from architecture code to generic
core code. The ARM, PPC, SH and X86 architectures are concerned.
No functional change should have occurred yet.
@peterz: Are you willing to pick up those patches?
Change from v1:
- dropped removal of arch_cpu_idle_prepare()
arch/arm/kernel/process.c | 16 +++------
arch/powerpc/platforms/pseries/processor_idle.c | 5 +++
arch/powerpc/platforms/pseries/setup.c | 34 ++++++++-----------
arch/sh/kernel/idle.c | 4 +--
arch/x86/kernel/process.c | 5 +--
kernel/Makefile | 1 -
kernel/cpu/Makefile | 1 -
kernel/sched/Makefile | 2 +-
kernel/{cpu => sched}/idle.c | 4 ++-
9 files changed, 30 insertions(+), 42 deletions(-)
Nicolas
Patchset related to hibernation resume:
- enhancement to make the use of an existing resume file more general
- add kstrdup_trimnl function which duplicates and trims a single
trailing newline off of a string
- cleanup checkpatch warnings in hibernate.c file
All patches are based on the 3.13 tag. This was tested on a
Beaglebone black with partial hibernation support, and compiled for
x86_64.
[PATCH v7 1/3] mm: add kstrdup_trimnl function
include/linux/string.h | 1 +
mm/util.c | 29 +++++++++++++++++++++++++++++
2 files changed, 30 insertions(+)
Adds the kstrdup_trimnl function to duplicate and trim
at most one trailing newline from a string.
This is useful for working with user input to sysfs.
[PATCH v7 2/3] trivial: PM / Hibernate: clean up checkpatch in
kernel/power/hibernate.c | 62 ++++++++++++++++++++++++----------------------
1 file changed, 32 insertions(+), 30 deletions(-)
Cleanup checkpatch warnings in kernel/power/hibernate.c
[PATCH v7 3/3] PM / Hibernate: use name_to_dev_t to parse resume
kernel/power/hibernate.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)
Use name_to_dev_t to parse the /sys/power/resume file making the
syntax more flexible. It supports the previous use syntax
and additionally can support other formats such as
/dev/devicenode and UUID= formats.
By changing /sys/debug/resume to accept the same syntax as
the resume=device parameter, we can parse the resume=device
in the initrd init script and use the resume device directly
from the kernel command line.
Changes in v7:
--------------
* Switch to trim only one trailing newline if present using kstrdup_trimnl
* remove kstrimdup patch
* add kstrdup_trimnl patch
* Add clean up patch for kernel/power/hibernate.c checkpatch warnings
Changes in v6:
--------------
* Revert tricky / confusing while loop indexing
Changes in v5:
--------------
* Change kstrimdup to minimize allocated memory. Now allocates only
the memory needed for the string instead of using strim.
Changes in v4:
--------------
* Dropped name_to_dev_t rework in favor of adding kstrimdup
* adjusted resume_store
Changes in v3:
--------------
* Dropped documentation patch as it went in through trivial
* Added patch for name_to_dev_t to support directly parsing userspace
buffer
Changes in v2:
--------------
* Added check for null return of kstrndup in hibernate.c
Thanks,
Sebastian
