Currently, FADump sysfs files are present inside /sys/kernel directory. But as the number of FADump sysfs file increases it is not a good idea to push all of them in /sys/kernel directory. It is better to have separate directory to keep all the FADump sysfs files. Patch series reorganizes the FADump sysfs files and avail all the existing FADump sysfs files present inside /sys/kernel into a new directory /sys/kernel/fadump. The backward compatibility is maintained by adding a symlink for every sysfs file that has moved to new location. Also a new FADump sys interface is added to get the amount of memory reserved by FADump for saving the crash dump. Changelog: v1 -> v5: - https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-December/201642.html v5 -> v6 - Unregister FADump if fadump group creation fails. - Remove fadump_enabled symlink if fadump_registered symlink creation fails. - Removed CREATE_SYMLINK macro. Sourabh Jain (6): Documentation/ABI: add ABI documentation for /sys/kernel/fadump_* sysfs: wrap __compat_only_sysfs_link_entry_to_kobj function to change the symlink name powerpc/fadump: reorganize /sys/kernel/fadump_* sysfs files powerpc/powernv: move core and fadump_release_opalcore under new kobject Documentation/ABI: mark /sys/kernel/fadump_* sysfs files deprecated powerpc/fadump: sysfs for fadump memory reservation .../ABI/obsolete/sysfs-kernel-fadump_enabled | 9 ++ .../obsolete/sysfs-kernel-fadump_registered | 10 ++ .../obsolete/sysfs-kernel-fadump_release_mem | 10 ++ .../sysfs-kernel-fadump_release_opalcore | 9 ++ Documentation/ABI/testing/sysfs-kernel-fadump | 40 ++++++ .../powerpc/firmware-assisted-dump.rst | 28 +++- arch/powerpc/kernel/fadump.c | 127 +++++++++++++----- arch/powerpc/platforms/powernv/opal-core.c | 55 +++++--- fs/sysfs/group.c | 28 +++- include/linux/sysfs.h | 12 ++ 10 files changed, 270 insertions(+), 58 deletions(-) create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-fadump_enabled create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-fadump_registered create mode 100644 Documentation/ABI/obsolete/sysfs-kernel-fadump_release_mem create mode 100644 Documentation/ABI/removed/sysfs-kernel-fadump_release_opalcore create mode 100644 Documentation/ABI/testing/sysfs-kernel-fadump -- 2.17.2
