• Nathan Fontenot's avatar
    sysfs/cpu: Add probe/release files · 12633e80
    Nathan Fontenot authored
    Version 3 of this patch is updated with documentation added to
    Documentation/ABI.  There are no changes to any of the C code from v2
    of the patch.
    
    In order to support kernel DLPAR of CPU resources we need to provide an
    interface to add (probe) and remove (release) the resource from the system.
    This patch Creates new generic probe and release sysfs files to facilitate
    cpu probe/release.  The probe/release interface provides for allowing each
    arch to supply their own routines for implementing the backend of adding
    and removing cpus to/from the system.
    
    This also creates the powerpc specific stubs to handle the arch callouts
    from writes to the sysfs files.
    
    The creation and use of these files is regulated by the
    CONFIG_ARCH_CPU_PROBE_RELEASE option so that only architectures that need the
    capability will have the files created.
    Signed-off-by: default avatarNathan Fontenot <nfont@austin.ibm.com>
    Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
    12633e80
sysfs.c 16.4 KB