From: Andrew Morton <akpm@osdl.org>

Dump the stack so we can find the secretive caller to acpi_format_exception().

Cc: Len Brown <len.brown@intel.com>
Signed-off-by: Andrew Morton <>
---

 drivers/acpi/utilities/utglobal.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN drivers/acpi/utilities/utglobal.c~acpi_format_exception-debug drivers/acpi/utilities/utglobal.c
--- a/drivers/acpi/utilities/utglobal.c~acpi_format_exception-debug
+++ a/drivers/acpi/utilities/utglobal.c
@@ -126,6 +126,7 @@ const char *acpi_format_exception(acpi_s
 			    "Unknown exception code: 0x%8.8X", status));
 
 		exception = "UNKNOWN_STATUS_CODE";
+		dump_stack();
 	}
 
 	return (ACPI_CAST_PTR(const char, exception));
_