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 03d01d783e3bf95c72f28259aad1550b97c5cc68..81cbe40c159c63c20968d224f960d3d353509946 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 2641731f24cd12835e92da4dec18d0f61dee9f68..19ccfb3b67d38fbcda48a684f2475bf13ea7ff88 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 2e1019ddbb2233667604f312b0597a32a1206a4d..bb1afc1a31ccb8de1f748949b79c1d6c962a5c35 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 5358f90b4dd2ccee0c6767a01ebbc4f238f77976..83ed00a5644ac1b72286adbf81a95b40219462ba 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 e1890e6d31b6bc660cb216473082e6e45df67eac..e72dcf6a421d8581cc0e3b7fd231b2b3ebcf644c 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 451ed54ce64609c0875a0d4db8503c2222ed7263..a1f346df0a710bd5441fbf6ceb46a8fe47927c2e 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 1553d56cf4e08f30e2454c4a20e85307059af331..c1d5a820b1aa3f64e72475203515b6a4303c1c0f 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 d9a795efbc045ea548f1fc60adf1d59cbe1437c3..6db35fba79fd2fe77977cbf47b053d2608b0e98a 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 9bc161a02c71ba65ef8e1394cb1617738533bd9e..ddbfc3322d7f461e693614405ac5ce2aee930148 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 85c86edd1e678a2d1f399076a3234efe749b314d..68205fd3b08c844e0db9d182c54f9e718032780f 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 3140151ede4502f537bd39ed37b99d2767a945f8..ae2ec334c3c61473ffa6b7b5cf8695c8d64c322b 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 1bf88396ba23921e8adaffa31f57320549cc91ca..c0f8a5c889107bf80ab45eaf33468e5120ee6a56 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 09596e01468e70400a7e351ed60abefadd700636..28afa4c5333c121e8a9feac719892fb17e5ef9a0 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