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50bec4ce5d
With CONFIG_IRQSOFF_TRACER the trace_hardirqs_off() function includes a call to __builtin_return_address(1). But we calltrace_hardirqs_off() from early entry code. There we have just a single stack frame. So this results in a kernel stack backchain walk that would walk beyond the kernel stack. Following the NULL terminated backchain this results in a lowcore read access. To fix this we simply call trace_hardirqs_off_caller() and pass the current instruction pointer. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> |
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| .. | ||
| asm-offsets.c | ||
| audit.c | ||
| audit.h | ||
| base.S | ||
| bitmap.S | ||
| compat_audit.c | ||
| compat_exec_domain.c | ||
| compat_linux.c | ||
| compat_linux.h | ||
| compat_ptrace.h | ||
| compat_signal.c | ||
| compat_wrapper.S | ||
| cpcmd.c | ||
| crash.c | ||
| debug.c | ||
| diag.c | ||
| dis.c | ||
| early.c | ||
| ebcdic.c | ||
| entry.h | ||
| entry.S | ||
| entry64.S | ||
| head.S | ||
| head31.S | ||
| head64.S | ||
| init_task.c | ||
| ipl.c | ||
| irq.c | ||
| kprobes.c | ||
| machine_kexec.c | ||
| Makefile | ||
| mem_detect.c | ||
| module.c | ||
| process.c | ||
| ptrace.c | ||
| reipl.S | ||
| reipl64.S | ||
| relocate_kernel.S | ||
| relocate_kernel64.S | ||
| s390_ext.c | ||
| s390_ksyms.c | ||
| setup.c | ||
| signal.c | ||
| smp.c | ||
| stacktrace.c | ||
| sys_s390.c | ||
| syscalls.S | ||
| time.c | ||
| topology.c | ||
| traps.c | ||
| vmlinux.lds.S | ||
| vtime.c | ||