[Crash-utility] [PATCH 0/3] RISC-V: Fix vtop warnings and improve kernel address range support

This series fixes two bugs and adds an enhancement for the riscv64 architecture support in the crash utility: Patch 1 fixes spurious "WARNING: mem_map[] not accessible" messages when running vtop or kmem -p on RISC-V. The root cause is that riscv64.c never sets the VMEMMAP flag on machdep->flags, so crash does not recognize that unmapped vmemmap holes are normal for SPARSEMEM_VMEMMAP configurations. Patch 2 fixes noisy "PAGE: not present" and "invalid for address" output from the vtop page table walk functions. These messages are printed unconditionally even when called non-verbosely by internal routines like kmem -p or dump_mem_map. They should only appear when verbose=1, consistent with all other diagnostic output in these functions and with how x86_64/arm64 handle the same case. Patch 3 adds an architecture-specific get_kvaddr_ranges callback so that the search command can properly categorize kernel virtual address regions including modules and vmemmap, instead of falling back to the generic two-region default. These patches were tested on a RISC-V 32-core machine with kernel 6.12.13.bsk.1-rc17-riscv64 and vmlinux ~700MB with debug info. Rui Qi (3): riscv64: Set VMEMMAP flag to fix spurious mem_map[] warnings riscv64: Guard verbose output in vtop page table walk functions riscv64: Add get_kvaddr_ranges callback for kernel address ranges riscv64.c | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 62 insertions(+), 6 deletions(-) -- 2.20.1