[PATCH] Add HAVE_KPROBES

Sam Ravnborg
2008-02-02T20:46:41Z

From: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>

Linus:

On the per-architecture side, I do think it would be better to *not* have
internal architecture knowledge in a generic file, and as such a line like

depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32

really shouldn't exist in a file like kernel/Kconfig.instrumentation.

It would be much better to do

depends on ARCH_SUPPORTS_KPROBES

in that generic file, and then architectures that do support it would just
have a

bool ARCH_SUPPORTS_KPROBES
default y

in *their* architecture files. That would seem to be much more logical,
and is readable both for arch maintainers *and* for people who have no
clue - and don't care - about which architecture is supposed to support
which interface...

Changelog:

Actually, I know I gave this as the magic incantation, but now that I see
it, I realize that I should have told you to just use

config KPROBES_SUPPORT
def_bool y

instead, which is a bit denser.

We seem to use both kinds of syntax for these things, but this is really
what "def_bool" is there for...

- Use HAVE_KPROBES
- Use a select

- Yet another update :
Moving to HAVE_* now.

- Update ARM for kprobes support.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
arch/arm/Kconfig | 1 +
arch/avr32/Kconfig | 1 +
arch/ia64/Kconfig | 1 +
arch/powerpc/Kconfig | 1 +
arch/ppc/Kconfig | 1 +
arch/s390/Kconfig | 1 +
arch/sparc64/Kconfig | 1 +
arch/x86/Kconfig | 1 +
kernel/Kconfig.instrumentation | 5 ++++-
9 files changed, 12 insertions(+), 1 deletions(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 3b3eb4e..ea45eef 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -11,6 +11,7 @@ config ARM
select RTC_LIB
select SYS_SUPPORTS_APM_EMULATION
select HAVE_OPROFILE
+ select HAVE_KPROBES if (!XIP_KERNEL)
help
The ARM series is a line of low-power-consumption RISC chip designs
licensed by ARM Ltd and targeted at embedded applications and
diff --git a/arch/avr32/Kconfig b/arch/avr32/Kconfig
index b46932c..0e56e96 100644
--- a/arch/avr32/Kconfig
+++ b/arch/avr32/Kconfig
@@ -11,6 +11,7 @@ config AVR32
# that we usually don't need on AVR32.
select EMBEDDED
select HAVE_OPROFILE
+ select HAVE_KPROBES
help
AVR32 is a high-performance 32-bit RISC microprocessor core,
designed for cost-sensitive embedded applications, with particular
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 5e410f2..8db6324 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -16,6 +16,7 @@ config IA64
select PM if (!IA64_HP_SIM)
select ARCH_SUPPORTS_MSI
select HAVE_OPROFILE
+ select HAVE_KPROBES
default y
help
The Itanium Processor Family is Intel's 64-bit successor to
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index c3c29e7..c6f3eb5 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -88,6 +88,7 @@ config PPC
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config EARLY_PRINTK
bool
diff --git a/arch/ppc/Kconfig b/arch/ppc/Kconfig
index ea9eb48..92e37f5 100644
--- a/arch/ppc/Kconfig
+++ b/arch/ppc/Kconfig
@@ -43,6 +43,7 @@ config PPC
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config PPC32
bool
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index c561f6f..272c6c8 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -52,6 +52,7 @@ mainmenu "Linux Kernel Configuration"
config S390
def_bool y
select HAVE_OPROFILE
+ select HAVE_KPROBES

source "init/Kconfig"

diff --git a/arch/sparc64/Kconfig b/arch/sparc64/Kconfig
index ca14d88..cbdc80d 100644
--- a/arch/sparc64/Kconfig
+++ b/arch/sparc64/Kconfig
@@ -9,6 +9,7 @@ config SPARC
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config SPARC64
bool
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 6559488..72db31c 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -19,6 +19,7 @@ config X86_64
config X86
def_bool y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config GENERIC_LOCKBREAK
def_bool n
diff --git a/kernel/Kconfig.instrumentation b/kernel/Kconfig.instrumentation
index d9d010a..2195b65 100644
--- a/kernel/Kconfig.instrumentation
+++ b/kernel/Kconfig.instrumentation
@@ -35,7 +35,7 @@ config HAVE_OPROFILE
config KPROBES
bool "Kprobes"
depends on KALLSYMS && MODULES && !UML
- depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32 || (ARM && !XIP_KERNEL)
+ depends on HAVE_KPROBES
help
Kprobes allows you to trap at almost any kernel address and
execute a callback function. register_kprobe() establishes
@@ -43,6 +43,9 @@ config KPROBES
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".

+config HAVE_KPROBES
+ def_bool n
+
config MARKERS
bool "Activate markers"
help
--
1.5.4.rc3.14.g44397