lib: consolidate DEBUG_STACK_USAGE option

Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way.  Move it
to lib/Kconfig.debug so each arch doesn't have to define it.  This
obviously makes the option generic, but that's fine because the config is
already used in generic code.

It's not obvious to me that sysrq-P actually does anything caution by
keeping the most inclusive wording.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Richard Weinberger <richard@nod.at>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Chen Liqin <liqin.chen@sunplusct.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 03d01d7..81cbe40 100644 (file)
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -63,13 +63,6 @@ config DEBUG_USER
              8 - SIGSEGV faults
             16 - SIGBUS faults
 
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T output.
-
 # These options are only for real kernel hackers who want to get their hands dirty.
 config DEBUG_LL
        bool "Kernel low-level debugging functions"

diff --git a/arch/blackfin/Kconfig.debug b/arch/blackfin/Kconfig.debug
index 2641731..19ccfb3 100644 (file)
--- a/arch/blackfin/Kconfig.debug
+++ b/arch/blackfin/Kconfig.debug
@@ -9,15 +9,6 @@ config DEBUG_STACKOVERFLOW
          This option will cause messages to be printed if free stack space
          drops below a certain limit.
 
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T output.
-
-         This option will slow down process creation somewhat.
-
 config DEBUG_VERBOSE
        bool "Verbose fault messages"
        default y

diff --git a/arch/m32r/Kconfig.debug b/arch/m32r/Kconfig.debug
index 2e1019d..bb1afc1 100644 (file)
--- a/arch/m32r/Kconfig.debug
+++ b/arch/m32r/Kconfig.debug
@@ -9,15 +9,6 @@ config DEBUG_STACKOVERFLOW
          This option will cause messages to be printed if free stack space
          drops below a certain limit.
 
-config DEBUG_STACK_USAGE
-       bool "Stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config DEBUG_PAGEALLOC
        bool "Debug page memory allocations"
        depends on DEBUG_KERNEL && BROKEN

diff --git a/arch/mips/Kconfig.debug b/arch/mips/Kconfig.debug
index 5358f90..83ed00a 100644 (file)
--- a/arch/mips/Kconfig.debug
+++ b/arch/mips/Kconfig.debug
@@ -76,15 +76,6 @@ config DEBUG_STACKOVERFLOW
          provides another way to check stack overflow happened on kernel mode
          stack usually caused by nested interruption.
 
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config SMTC_IDLE_HOOK_DEBUG
        bool "Enable additional debug checks before going into CPU idle loop"
        depends on DEBUG_KERNEL && MIPS_MT_SMTC

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index e1890e6..e72dcf6 100644 (file)
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -35,15 +35,6 @@ config DEBUG_STACKOVERFLOW
          This option will cause messages to be printed if free stack space
          drops below a certain limit.
 
-config DEBUG_STACK_USAGE
-       bool "Stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config HCALL_STATS
        bool "Hypervisor call instrumentation"
        depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS

diff --git a/arch/score/Kconfig.debug b/arch/score/Kconfig.debug
index 451ed54..a1f346d 100644 (file)
--- a/arch/score/Kconfig.debug
+++ b/arch/score/Kconfig.debug
@@ -16,15 +16,6 @@ config CMDLINE
          other cases you can specify kernel args so that you don't have
          to set them up in board prom initialization routines.
 
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config RUNTIME_DEBUG
        bool "Enable run-time debugging"
        depends on DEBUG_KERNEL

diff --git a/arch/sh/Kconfig.debug b/arch/sh/Kconfig.debug
index 1553d56..c1d5a82 100644 (file)
--- a/arch/sh/Kconfig.debug
+++ b/arch/sh/Kconfig.debug
@@ -28,15 +28,6 @@ config STACK_DEBUG
          every function call and will therefore incur a major
          performance hit. Most users should say N.
 
-config DEBUG_STACK_USAGE
-       bool "Stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config 4KSTACKS
        bool "Use 4Kb for kernel stacks instead of 8Kb"
        depends on DEBUG_KERNEL && (MMU || BROKEN) && !PAGE_SIZE_64KB

diff --git a/arch/sparc/Kconfig.debug b/arch/sparc/Kconfig.debug
index d9a795e..6db35fb 100644 (file)
--- a/arch/sparc/Kconfig.debug
+++ b/arch/sparc/Kconfig.debug
@@ -6,15 +6,6 @@ config TRACE_IRQFLAGS_SUPPORT
 
 source "lib/Kconfig.debug"
 
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config DEBUG_DCFLUSH
        bool "D-cache flush debugging"
        depends on SPARC64 && DEBUG_KERNEL

diff --git a/arch/tile/Kconfig.debug b/arch/tile/Kconfig.debug
index 9bc161a..ddbfc33 100644 (file)
--- a/arch/tile/Kconfig.debug
+++ b/arch/tile/Kconfig.debug
@@ -21,15 +21,6 @@ config DEBUG_STACKOVERFLOW
          This option will cause messages to be printed if free stack space
          drops below a certain limit.
 
-config DEBUG_STACK_USAGE
-       bool "Stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config DEBUG_EXTRA_FLAGS
        string "Additional compiler arguments when building with '-g'"
        depends on DEBUG_INFO

diff --git a/arch/um/Kconfig.debug b/arch/um/Kconfig.debug
index 85c86ed..68205fd 100644 (file)
--- a/arch/um/Kconfig.debug
+++ b/arch/um/Kconfig.debug
@@ -28,16 +28,6 @@ config GCOV
          If you're involved in UML kernel development and want to use gcov,
          say Y.  If you're unsure, say N.
 
-config DEBUG_STACK_USAGE
-       bool "Stack utilization instrumentation"
-       default N
-       help
-         Track the maximum kernel stack usage - this will look at each
-         kernel stack at process exit and log it if it's the deepest
-         stack seen so far.
-
-         This option will slow down process creation and destruction somewhat.
-
 config EARLY_PRINTK
        bool "Early printk"
        default y

diff --git a/arch/unicore32/Kconfig.debug b/arch/unicore32/Kconfig.debug
index 3140151..ae2ec33 100644 (file)
--- a/arch/unicore32/Kconfig.debug
+++ b/arch/unicore32/Kconfig.debug
@@ -27,13 +27,6 @@ config EARLY_PRINTK
          with klogd/syslogd or the X server. You should normally N here,
          unless you want to debug such a crash.
 
-config DEBUG_STACK_USAGE
-       bool "Enable stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       help
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T output.
-
 # These options are only for real kernel hackers who want to get their hands dirty.
 config DEBUG_LL
        bool "Kernel low-level debugging functions"

diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index 1bf8839..c0f8a5c 100644 (file)
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -66,15 +66,6 @@ config DEBUG_STACKOVERFLOW
          This option will cause messages to be printed if free stack space
          drops below a certain limit.
 
-config DEBUG_STACK_USAGE
-       bool "Stack utilization instrumentation"
-       depends on DEBUG_KERNEL
-       ---help---
-         Enables the display of the minimum amount of free stack which each
-         task has ever had available in the sysrq-T and sysrq-P debug output.
-
-         This option will slow down process creation somewhat.
-
 config X86_PTDUMP
        bool "Export kernel pagetable layout to userspace via debugfs"
        depends on DEBUG_KERNEL

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 09596e0..28afa4c 100644 (file)
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -670,6 +670,15 @@ config STACKTRACE
        bool
        depends on STACKTRACE_SUPPORT
 
+config DEBUG_STACK_USAGE
+       bool "Stack utilization instrumentation"
+       depends on DEBUG_KERNEL
+       help
+         Enables the display of the minimum amount of free stack which each
+         task has ever had available in the sysrq-T and sysrq-P debug output.
+
+         This option will slow down process creation somewhat.
+
 config DEBUG_KOBJECT
        bool "kobject debugging"
        depends on DEBUG_KERNEL