crash_notes should be checked with NULL, not its percpu member, which can not be NULL Signed-off-by: Li RongQing <lirongqing@xxxxxxxxx> --- kernel/kexec_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c index d7140447be75..8c0d6feb76d5 100644 --- a/kernel/kexec_core.c +++ b/kernel/kexec_core.c @@ -1067,9 +1067,9 @@ void crash_save_cpu(struct pt_regs *regs, int cpu) * squirrelled away. ELF notes happen to provide * all of that, so there is no need to invent something new. */ - buf = (u32 *)per_cpu_ptr(crash_notes, cpu); - if (!buf) + if (!crash_notes) return; + buf = (u32 *)per_cpu_ptr(crash_notes, cpu); memset(&prstatus, 0, sizeof(prstatus)); prstatus.pr_pid = current->pid; elf_core_copy_kernel_regs(&prstatus.pr_reg, regs); -- 2.16.2 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
