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Commit 85718fae authored by Tony Luck's avatar Tony Luck
Browse files

[IA64] Add CONFIG_STACKTRACE_SUPPORT 



Several Linux features are dependent on stack trace support. Add
it so they can be enabled.

Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 57aebd77

arch/ia64/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -62,6 +62,9 @@ config NEED_SG_DMA_LENGTH 
config SWIOTLB

       bool



config STACKTRACE_SUPPORT

	def_bool y



config GENERIC_LOCKBREAK

	def_bool n

arch/ia64/kernel/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ obj-$(CONFIG_AUDIT) += audit.o 
obj-$(CONFIG_PCI_MSI)		+= msi_ia64.o

mca_recovery-y			+= mca_drv.o mca_drv_asm.o

obj-$(CONFIG_IA64_MC_ERR_INJECT)+= err_inject.o

obj-$(CONFIG_STACKTRACE)	+= stacktrace.o



obj-$(CONFIG_PARAVIRT)		+= paravirt.o paravirtentry.o \

				   paravirt_patch.o

arch/ia64/kernel/stacktrace.c

0 → 100644
+39 −0
Original line number Diff line number Diff line 
/*

 * arch/ia64/kernel/stacktrace.c

 *

 * Stack trace management functions

 *

 */

#include <linux/sched.h>

#include <linux/stacktrace.h>

#include <linux/module.h>



static void

ia64_do_save_stack(struct unw_frame_info *info, void *arg)

{

	struct stack_trace *trace = arg;

	unsigned long ip;

	int skip = trace->skip;



	trace->nr_entries = 0;

	do {

		unw_get_ip(info, &ip);

		if (ip == 0)

			break;

		if (skip == 0) {

			trace->entries[trace->nr_entries++] = ip;

			if (trace->nr_entries == trace->max_entries)

				break;

		} else

			skip--;

	} while (unw_unwind(info) >= 0);

}



/*

 * Save stack-backtrace addresses into a stack_trace buffer.

 */

void save_stack_trace(struct stack_trace *trace)

{

	unw_init_running(ia64_do_save_stack, trace);

}

EXPORT_SYMBOL(save_stack_trace);