diff options
| -rw-r--r-- | arch/s390/kernel/stacktrace.c | 26 |
1 files changed, 11 insertions, 15 deletions
diff --git a/arch/s390/kernel/stacktrace.c b/arch/s390/kernel/stacktrace.c index 515ff9011dd7..da6924729964 100644 --- a/arch/s390/kernel/stacktrace.c +++ b/arch/s390/kernel/stacktrace.c | |||
| @@ -12,7 +12,6 @@ | |||
| 12 | #include <linux/kallsyms.h> | 12 | #include <linux/kallsyms.h> |
| 13 | 13 | ||
| 14 | static unsigned long save_context_stack(struct stack_trace *trace, | 14 | static unsigned long save_context_stack(struct stack_trace *trace, |
| 15 | unsigned int *skip, | ||
| 16 | unsigned long sp, | 15 | unsigned long sp, |
| 17 | unsigned long low, | 16 | unsigned long low, |
| 18 | unsigned long high) | 17 | unsigned long high) |
| @@ -28,10 +27,10 @@ static unsigned long save_context_stack(struct stack_trace *trace, | |||
| 28 | sf = (struct stack_frame *)sp; | 27 | sf = (struct stack_frame *)sp; |
| 29 | while(1) { | 28 | while(1) { |
| 30 | addr = sf->gprs[8] & PSW_ADDR_INSN; | 29 | addr = sf->gprs[8] & PSW_ADDR_INSN; |
| 31 | if (!(*skip)) | 30 | if (!trace->skip) |
| 32 | trace->entries[trace->nr_entries++] = addr; | 31 | trace->entries[trace->nr_entries++] = addr; |
| 33 | else | 32 | else |
| 34 | (*skip)--; | 33 | trace->skip--; |
| 35 | if (trace->nr_entries >= trace->max_entries) | 34 | if (trace->nr_entries >= trace->max_entries) |
| 36 | return sp; | 35 | return sp; |
| 37 | low = sp; | 36 | low = sp; |
| @@ -48,10 +47,10 @@ static unsigned long save_context_stack(struct stack_trace *trace, | |||
| 48 | return sp; | 47 | return sp; |
| 49 | regs = (struct pt_regs *)sp; | 48 | regs = (struct pt_regs *)sp; |
| 50 | addr = regs->psw.addr & PSW_ADDR_INSN; | 49 | addr = regs->psw.addr & PSW_ADDR_INSN; |
| 51 | if (!(*skip)) | 50 | if (!trace->skip) |
| 52 | trace->entries[trace->nr_entries++] = addr; | 51 | trace->entries[trace->nr_entries++] = addr; |
| 53 | else | 52 | else |
| 54 | (*skip)--; | 53 | trace->skip--; |
| 55 | if (trace->nr_entries >= trace->max_entries) | 54 | if (trace->nr_entries >= trace->max_entries) |
| 56 | return sp; | 55 | return sp; |
| 57 | low = sp; | 56 | low = sp; |
| @@ -65,20 +64,17 @@ void save_stack_trace(struct stack_trace *trace) | |||
| 65 | unsigned long orig_sp, new_sp; | 64 | unsigned long orig_sp, new_sp; |
| 66 | 65 | ||
| 67 | orig_sp = sp & PSW_ADDR_INSN; | 66 | orig_sp = sp & PSW_ADDR_INSN; |
| 68 | 67 | new_sp = save_context_stack(trace, orig_sp, | |
| 69 | new_sp = save_context_stack(trace, &trace->skip, orig_sp, | 68 | S390_lowcore.panic_stack - PAGE_SIZE, |
| 70 | S390_lowcore.panic_stack - PAGE_SIZE, | 69 | S390_lowcore.panic_stack); |
| 71 | S390_lowcore.panic_stack); | ||
| 72 | if (new_sp != orig_sp) | 70 | if (new_sp != orig_sp) |
| 73 | return; | 71 | return; |
| 74 | new_sp = save_context_stack(trace, &trace->skip, new_sp, | 72 | new_sp = save_context_stack(trace, new_sp, |
| 75 | S390_lowcore.async_stack - ASYNC_SIZE, | 73 | S390_lowcore.async_stack - ASYNC_SIZE, |
| 76 | S390_lowcore.async_stack); | 74 | S390_lowcore.async_stack); |
| 77 | if (new_sp != orig_sp) | 75 | if (new_sp != orig_sp) |
| 78 | return; | 76 | return; |
| 79 | 77 | save_context_stack(trace, new_sp, | |
| 80 | save_context_stack(trace, &trace->skip, new_sp, | ||
| 81 | S390_lowcore.thread_info, | 78 | S390_lowcore.thread_info, |
| 82 | S390_lowcore.thread_info + THREAD_SIZE); | 79 | S390_lowcore.thread_info + THREAD_SIZE); |
| 83 | return; | ||
| 84 | } | 80 | } |
