Kconfig: remove HAVE_LATENCYTOP_SUPPORT

As illustrated by commit a3afe70b83fd ("[S390] latencytop s390
support."), HAVE_LATENCYTOP_SUPPORT is defined by an architecture to
advertise an implementation of save_stack_trace_tsk.

However, as of 9212ddb5eada ("stacktrace: provide save_stack_trace_tsk()
weak alias") a dummy implementation is provided if STACKTRACE=y.  Given
that LATENCYTOP already depends on STACKTRACE_SUPPORT and selects
STACKTRACE, we can remove HAVE_LATENCYTOP_SUPPORT altogether.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Helge Deller <deller@gmx.de>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

12 files changed, 0 insertions, 37 deletions

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index 6312f607932f..76dde9db7934 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -73,9 +73,6 @@ config STACKTRACE_SUPPORT
         def_bool y
         select STACKTRACE
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config HAVE_ARCH_TRANSPARENT_HUGEPAGE
         def_bool y
         depends on ARC_MMU_V4
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 4e489cc5c45e..6a889afa6a2c 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -168,11 +168,6 @@ config STACKTRACE_SUPPORT
         bool
         default y
 
-config HAVE_LATENCYTOP_SUPPORT
-        bool
-        depends on !SMP
-        default y
-
 config LOCKDEP_SUPPORT
         bool
         default y
diff --git a/arch/metag/Kconfig b/arch/metag/Kconfig
index 0b389a81c43a..a0fa88da3e31 100644
--- a/arch/metag/Kconfig
+++ b/arch/metag/Kconfig
@@ -36,9 +36,6 @@ config STACKTRACE_SUPPORT
 config LOCKDEP_SUPPORT
         def_bool y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config RWSEM_GENERIC_SPINLOCK
         def_bool y
 
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index 0bce820428fc..5ecd0287a874 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -67,9 +67,6 @@ config STACKTRACE_SUPPORT
 config LOCKDEP_SUPPORT
         def_bool y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 source "init/Kconfig"
 
 source "kernel/Kconfig.freezer"
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 729f89163bc3..7c34cafdf301 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -79,9 +79,6 @@ config TIME_LOW_RES
         depends on SMP
         default y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 # unless you want to implement ACPI on PA-RISC ... ;-)
 config PM
         bool
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 7d5a8350f913..94f6c5089e0c 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -47,9 +47,6 @@ config STACKTRACE_SUPPORT
         bool
         default y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config TRACE_IRQFLAGS_SUPPORT
         bool
         default y
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 24490344c30f..dbeeb3a049f2 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -10,9 +10,6 @@ config LOCKDEP_SUPPORT
 config STACKTRACE_SUPPORT
         def_bool y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config RWSEM_GENERIC_SPINLOCK
         bool
 
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index d514df7e04dd..6c391a5d3e5c 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -130,9 +130,6 @@ config STACKTRACE_SUPPORT
 config LOCKDEP_SUPPORT
         def_bool y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config ARCH_HAS_ILOG2_U32
         def_bool n
 
diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
index 56442d2d7bbc..3203e42190dd 100644
--- a/arch/sparc/Kconfig
+++ b/arch/sparc/Kconfig
@@ -101,10 +101,6 @@ config LOCKDEP_SUPPORT
         bool
         default y if SPARC64
 
-config HAVE_LATENCYTOP_SUPPORT
-        bool
-        default y if SPARC64
-
 config ARCH_HIBERNATION_POSSIBLE
         def_bool y if SPARC64
 
diff --git a/arch/unicore32/Kconfig b/arch/unicore32/Kconfig
index 5dc4c0a43ccd..877342640b6e 100644
--- a/arch/unicore32/Kconfig
+++ b/arch/unicore32/Kconfig
@@ -34,9 +34,6 @@ config NO_IOPORT_MAP
 config STACKTRACE_SUPPORT
         def_bool y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config LOCKDEP_SUPPORT
         def_bool y
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 24f362bf3ec6..4a10ba9e95da 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -180,9 +180,6 @@ config LOCKDEP_SUPPORT
 config STACKTRACE_SUPPORT
         def_bool y
 
-config HAVE_LATENCYTOP_SUPPORT
-        def_bool y
-
 config MMU
         def_bool y
 
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 8fbdef1980a5..f75a33f29f6e 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -1597,7 +1597,6 @@ config FAULT_INJECTION_STACKTRACE_FILTER
 
 config LATENCYTOP
         bool "Latency measuring infrastructure"
-        depends on HAVE_LATENCYTOP_SUPPORT
         depends on DEBUG_KERNEL
         depends on STACKTRACE_SUPPORT
         depends on PROC_FS