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85a0ee342e
The usage of elfcorehdr_addr has changed recently such that being set to ELFCORE_ADDR_MAX is used by is_kdump_kernel() to indicate if the code is executing in a kernel executed as a crash kernel. However, arch/ia64/kernel/setup.c:reserve_elfcorehdr will rest elfcorehdr_addr to ELFCORE_ADDR_MAX on error, which means any subsequent calls to is_kdump_kernel() will return 0, even though they should return 1. Ok, at this point in time there are no subsequent calls, but I think its fair to say that there is ample scope for error or at the very least confusion. This patch add an extra state, ELFCORE_ADDR_ERR, which indicates that elfcorehdr_addr was passed on the command line, and thus execution is taking place in a crashdump kernel, but vmcore can't be used for some reason. This is tested for using is_vmcore_usable() and set using vmcore_unusable(). A subsequent patch makes use of this new code. To summarise, the states that elfcorehdr_addr can now be in are as follows: ELFCORE_ADDR_MAX: not a crashdump kernel ELFCORE_ADDR_ERR: crashdump kernel but vmcore is unusable any other value: crash dump kernel and vmcore is usable Signed-off-by: Simon Horman <horms@verge.net.au> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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| cpufreq | ||
| .gitignore | ||
| acpi-ext.c | ||
| acpi-processor.c | ||
| acpi.c | ||
| asm-offsets.c | ||
| audit.c | ||
| brl_emu.c | ||
| crash_dump.c | ||
| crash.c | ||
| cyclone.c | ||
| efi_stub.S | ||
| efi.c | ||
| entry.h | ||
| entry.S | ||
| err_inject.c | ||
| esi_stub.S | ||
| esi.c | ||
| fsys.S | ||
| fsyscall_gtod_data.h | ||
| gate-data.S | ||
| gate.lds.S | ||
| gate.S | ||
| head.S | ||
| ia64_ksyms.c | ||
| init_task.c | ||
| iosapic.c | ||
| irq_ia64.c | ||
| irq_lsapic.c | ||
| irq.c | ||
| ivt.S | ||
| jprobes.S | ||
| kprobes.c | ||
| machine_kexec.c | ||
| machvec.c | ||
| Makefile | ||
| mca_asm.S | ||
| mca_drv_asm.S | ||
| mca_drv.c | ||
| mca_drv.h | ||
| mca.c | ||
| minstate.h | ||
| module.c | ||
| msi_ia64.c | ||
| nr-irqs.c | ||
| numa.c | ||
| pal.S | ||
| palinfo.c | ||
| paravirt_inst.h | ||
| paravirt.c | ||
| paravirtentry.S | ||
| patch.c | ||
| perfmon_default_smpl.c | ||
| perfmon_generic.h | ||
| perfmon_itanium.h | ||
| perfmon_mckinley.h | ||
| perfmon_montecito.h | ||
| perfmon.c | ||
| process.c | ||
| ptrace.c | ||
| relocate_kernel.S | ||
| sal.c | ||
| salinfo.c | ||
| setup.c | ||
| sigframe.h | ||
| signal.c | ||
| smp.c | ||
| smpboot.c | ||
| sys_ia64.c | ||
| time.c | ||
| topology.c | ||
| traps.c | ||
| unaligned.c | ||
| uncached.c | ||
| unwind_decoder.c | ||
| unwind_i.h | ||
| unwind.c | ||
| vmlinux.lds.S | ||