Signed-off-by: Helge Deller <deller@xxxxxx>
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index aacf11d..4866e2f 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -75,6 +75,9 @@ config GENERIC_HARDIRQS
config GENERIC_IRQ_PROBE
def_bool y
+config HAVE_LATENCYTOP_SUPPORT
+ def_bool y
+
config IRQ_PER_CPU
bool
default y
@@ -83,6 +86,9 @@ config IRQ_PER_CPU
config PM
bool
+config STACKTRACE_SUPPORT
+ def_bool y
+
config ISA_DMA_API
bool
diff --git a/arch/parisc/kernel/Makefile b/arch/parisc/kernel/Makefile
index 016d3fc..a7ba8cd 100644
--- a/arch/parisc/kernel/Makefile
+++ b/arch/parisc/kernel/Makefile
@@ -16,5 +16,6 @@ obj-$(CONFIG_PA11) += pci-dma.o
obj-$(CONFIG_PCI) += pci.o
obj-$(CONFIG_MODULES) += module.o
obj-$(CONFIG_64BIT) += binfmt_elf32.o sys_parisc32.o signal32.o
+obj-$(CONFIG_STACKTRACE)+= stacktrace.o
# only supported for PCX-W/U in 64-bit mode at the moment
obj-$(CONFIG_64BIT) += perf.o perf_asm.o
diff -up ./arch/parisc/kernel/stacktrace.c.org ./arch/parisc/kernel/stacktrace.c
--- a/arch/parisc/kernel/stacktrace.c.org 2009-02-06 21:40:33.000000000 +0100
+++ b/arch/parisc/kernel/stacktrace.c 2009-02-06 21:45:16.000000000 +0100
@@ -0,0 +1,63 @@
+/*
+ * Stack trace management functions
+ *
+ * Copyright (C) 2009 Helge Deller <deller@xxxxxx>
+ * based on arch/x86/kernel/stacktrace.c by Ingo Molnar <mingo@xxxxxxxxxx>
+ * and parisc unwind functions by Randolph Chung <tausq@xxxxxxxxxx>
+ *
+ * TODO: Userspace stacktrace (CONFIG_USER_STACKTRACE_SUPPORT)
+ */
+#include <linux/module.h>
+#include <linux/stacktrace.h>
+
+#include <asm/unwind.h>
+
+static void dump_trace(struct task_struct *task, struct stack_trace *trace)
+{
+ struct unwind_frame_info info;
+
+ /* initialize unwind info */
+ if (task == current) {
+ unsigned long sp;
+ struct pt_regs r;
+HERE:
+ asm volatile ("copy %%r30, %0" : "=r"(sp));
+ memset(&r, 0, sizeof(struct pt_regs));
+ r.iaoq[0] = (unsigned long)&&HERE;
+ r.gr[2] = (unsigned long)__builtin_return_address(0);
+ r.gr[30] = sp;
+ unwind_frame_init(&info, task, &r);
+ } else {
+ unwind_frame_init_from_blocked_task(&info, task);
+ }
+
+ /* unwind stack and save entries in stack_trace struct */
+ trace->nr_entries = 0;
+ while (trace->nr_entries < trace->max_entries) {
+ if (unwind_once(&info) < 0 || info.ip == 0)
+ break;
+
+ if (__kernel_text_address(info.ip))
+ trace->entries[trace->nr_entries++] = info.ip;
+ }
+}
+
+
+/*
+ * Save stack-backtrace addresses into a stack_trace buffer.
+ */
+void save_stack_trace(struct stack_trace *trace)
+{
+ dump_trace(current, trace);
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace);
+
+void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
+{
+ dump_trace(tsk, trace);
+ if (trace->nr_entries < trace->max_entries)
+ trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
--
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