GitLab

This patch cleans up the per-CPU MCA mess with the following changes
(and yields a UP kernel that actually boots again):

 - In percpu.h, make per_cpu_init() a function-call even for the
   UP case.
 - In contig.c, enable per_cpu_init() even for UP since we need to
   allocate the per-CPU MCA data in that case as well.
 - Move the MCA-related stuff out of the cpuinfo structure into
   per-CPU variables defined by mca.c.
 - Rename IA64_KR_PA_CPU_INFO to IA64_KR_PER_CPU_DATA, since it really
   is a per-CPU pointer now.
 - In mca.h, move IA64_MCA_STACK_SIZE early enough so it gets defined
   for assembly-code, too.  Tidy up struct ia64_mca_struct.  Add declaration
   of ia64_mca_cpu_init().
 - In mca_asm.[hS], replace various GET_*() macros with a single
   GET_PERCPU_ADDR() which loads the physical address of an
   arbitrary per-CPU variable.  Remove all dependencies on the
   layout of the cpuinfo structure.  Replace hardcoded stack-size
   with I...