[Crash-utility] [PATCH v2 0/6] bt fixes and cleanup for ppc64

This patch series fixes a couple of issues with bt on ppc64 and also does some code cleanup. Patch #1 fixes the broken '-S' option on ppc64. The next patch changes h/w interrupt stack allocation to dynamic as this field remains unused in most cases. The next patch renames ppc64_paca_init() function to ppc64_paca_percpu_offset_init() to reflect what the function actually does. Patch#4 adds support to process backtrace when the stack pointer is in an emergency SP. The next patch adds support to print emergency stack data. And the last patch ensures a variable is used instead of machdep->machspec to optimize code and improve readability. Changes in v2: * Print "(unused)", if hwintrstack is not being used. * Avoid using variable length array for paca_ptrs. * With 'mach' command, print emergency stack data by default (no special option). Hari Bathini (6): ppc64: fix bt for '-S' case ppc64: dynamically allocate h/w interrupt stack ppc64: rename ppc64_paca_init to ppc64_paca_percpu_offset_init ppc64: handle backtrace when CPU is in an emerency stack ppc64: print emergency stacks info with 'mach' command ppc64: use a variable for machdep->machspec defs.h | 14 +- ppc64.c | 535 ++++++++++++++++++++++++++++++++++++++++---------------- 2 files changed, 393 insertions(+), 156 deletions(-) -- 2.35.3