[PATCH v3 RFT 0/2] PM / Hibernate: sysfs resume
Sebastian Capella
sebastian.capella at linaro.org
Wed Sep 18 19:29:00 EDT 2013
Patchset related to hibernation resume: one enhancement to make the use
of an existing resume file more general and one enhances name_to_dev_t
to ignore the trailing newlines coming from userspace.
Both patches are based on the 3.11 tag. This was tested on a
Pandaboard with partial hibernation support, and compiled for x86.
Further testing is needed on other platforms. Please let me know if
you're able to verify this on any other systems.
[PATCH 1/2] init/do_mounts.c: ignore final \n in name_to_dev_t
init/do_mounts.c | 23 ++++++++++++++++++-----
1 file changed, 18 insertions(+), 5 deletions(-)
Changes name_to_dev_t to handle a trailing newline in the
input buffer, which will allow name_to_dev_t to be used
directly with user buffers without requiring a copy.
Also adds a const to the name parameter which reflects
how name_to_dev_t is treating the input buffer currently.
This also allows direct use of user buffers
(from resume_store for example).
[PATCH 2/2] PM / Hibernate: use name_to_dev_t to parse resume
kernel/power/hibernate.c | 15 ++++-----------
1 file changed, 4 insertions(+), 11 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 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
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