This config option was apparently disallowed on x86_64 because of
problems with the stack unwinder:

    commit 6d690dcac92a84f98fd774862628ff871b713660
    Author: Akinobu Mita <akinobu.m...@gmail.com>
    Date:   Sat May 12 10:36:53 2007 -0700

        fault injection: disable stacktrace filter for x86-64

However, I observe no problems whatsoever with this today and in fact
it's been very useful for debugging. Let's allow it again.

Cc: Akinobu Mita <akinobu.m...@gmail.com>
Signed-off-by: Vegard Nossum <vegard.nos...@oracle.com>
---
 lib/Kconfig.debug | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index d7cc65a..861fc1d 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1666,7 +1666,6 @@ config FAULT_INJECTION_DEBUG_FS
 config FAULT_INJECTION_STACKTRACE_FILTER
        bool "stacktrace filter for fault-injection capabilities"
        depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
-       depends on !X86_64
        select STACKTRACE
        select FRAME_POINTER if !MIPS && !PPC && !S390 && !MICROBLAZE && 
!ARM_UNWIND && !ARC && !SCORE
        help
-- 
2.10.0.479.g221bd91

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