This patch introduces SYSCTL_EXCEPTION_TRACE config option and selects
it in the architectures requiring support for the "exception-trace"
debug_table entry in kernel/sysctl.c.
Signed-off-by: Catalin Marinas <catalin.mari...@arm.com>
Cc: Benjamin Herrenschmidt <b...@kernel.crashing.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Martin Schwidefsky <schwidef...@de.ibm.com>
Cc: Heiko Carstens <heiko.carst...@de.ibm.com>
Cc: "David S. Miller" <da...@davemloft.net>
Cc: Chris Metcalf <cmetc...@tilera.com>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: x...@kernel.org
Cc: Andrew Morton <a...@linux-foundation.org>
---
arch/arm64/Kconfig | 1 +
arch/powerpc/Kconfig | 1 +
arch/s390/Kconfig | 1 +
arch/sparc/Kconfig | 1 +
arch/tile/Kconfig | 1 +
arch/x86/Kconfig | 1 +
init/Kconfig | 5 +++++
kernel/sysctl.c | 3 +--
8 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a308560..7ff68c9 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -28,6 +28,7 @@ config ARM64
select PERF_USE_VMALLOC
select RTC_LIB
select SPARSE_IRQ
+ select SYSCTL_EXCEPTION_TRACE
help
ARM 64-bit (AArch64) Linux support.
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 63c640d..1ab473a 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -140,6 +140,7 @@ config PPC
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select HAVE_DEBUG_KMEMLEAK
+ select SYSCTL_EXCEPTION_TRACE
config EARLY_PRINTK
bool
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index d3216d7..0391630 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -134,6 +134,7 @@ config S390
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_UID16 if 32BIT
select HAVE_DEBUG_KMEMLEAK
+ select SYSCTL_EXCEPTION_TRACE
config SCHED_OMIT_FRAME_POINTER
def_bool y
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 2006ddc..d427993 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -38,6 +38,7 @@ config SPARC
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select HAVE_DEBUG_BUGVERBOSE
+ select SYSCTL_EXCEPTION_TRACE
config SPARC32
def_bool !64BIT
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index e38ae98..e4bb0ca 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -19,6 +19,7 @@ config TILE
select GENERIC_CLOCKEVENTS
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_BUGVERBOSE
+ select SYSCTL_EXCEPTION_TRACE
# FIXME: investigate whether we need/want these options.
# select HAVE_IOREMAP_PROT
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6995d6b..5aaa3b6 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -106,6 +106,7 @@ config X86
select HAVE_RCU_USER_QS if X86_64
select HAVE_IRQ_TIME_ACCOUNTING
select HAVE_DEBUG_KMEMLEAK
+ select SYSCTL_EXCEPTION_TRACE
config INSTRUCTION_DECODER
def_bool y
diff --git a/init/Kconfig b/init/Kconfig
index f8de091..4d13aae 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1152,6 +1152,11 @@ config SYSCTL_SYSCALL
If unsure say N here.
+config SYSCTL_EXCEPTION_TRACE
+ bool
+ help
+ Enable support for /proc/sys/debug/exception-trace.
+
config KALLSYMS
bool "Load all symbols for debugging/ksymoops" if EXPERT
default y
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 84c76a3..b0eaca7 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1543,8 +1543,7 @@ static struct ctl_table fs_table[] = {
};
static struct ctl_table debug_table[] = {
-#if defined(CONFIG_X86) || defined(CONFIG_PPC) || defined(CONFIG_SPARC) || \
- defined(CONFIG_S390) || defined(CONFIG_TILE) || defined(CONFIG_ARM64)
+#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
{
.procname = "exception-trace",
.data = &show_unhandled_signals,
--
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