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Subject[patch 3/4] Add HAVE_KPROBES
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.


Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: Linus Torvalds <torvalds@linux-foundation.org>
CC: Sam Ravnborg <sam@ravnborg.org>
---
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 ++++-
8 files changed, 11 insertions(+), 1 deletion(-)
Index: linux-2.6-lttng/arch/avr32/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/avr32/Kconfig 2007-11-15 21:18:40.000000000 -0500
+++ linux-2.6-lttng/arch/avr32/Kconfig 2007-11-15 21:24:51.000000000 -0500
@@ -11,6 +11,7 @@ config AVR32
# With EMBEDDED=n, we get lots of stuff automatically selected
# that we usually don't need on AVR32.
select EMBEDDED
+ select HAVE_KPROBES
help
AVR32 is a high-performance 32-bit RISC microprocessor core,
designed for cost-sensitive embedded applications, with particular
Index: linux-2.6-lttng/arch/ia64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/ia64/Kconfig 2007-11-15 21:23:35.000000000 -0500
+++ linux-2.6-lttng/arch/ia64/Kconfig 2007-11-15 21:33:43.000000000 -0500
@@ -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
Index: linux-2.6-lttng/arch/powerpc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/powerpc/Kconfig 2007-11-15 21:23:35.000000000 -0500
+++ linux-2.6-lttng/arch/powerpc/Kconfig 2007-11-15 21:33:43.000000000 -0500
@@ -80,6 +80,7 @@ config PPC
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config EARLY_PRINTK
bool
Index: linux-2.6-lttng/arch/ppc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/Kconfig 2007-11-15 21:23:35.000000000 -0500
+++ linux-2.6-lttng/arch/ppc/Kconfig 2007-11-15 21:33:43.000000000 -0500
@@ -43,6 +43,7 @@ config PPC
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config PPC32
bool
Index: linux-2.6-lttng/arch/s390/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/s390/Kconfig 2007-11-15 21:23:35.000000000 -0500
+++ linux-2.6-lttng/arch/s390/Kconfig 2007-11-15 21:33:43.000000000 -0500
@@ -52,6 +52,7 @@ mainmenu "Linux Kernel Configuration"
config S390
def_bool y
select HAVE_OPROFILE
+ select HAVE_KPROBES

source "init/Kconfig"

Index: linux-2.6-lttng/arch/sparc64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/sparc64/Kconfig 2007-11-15 21:23:35.000000000 -0500
+++ linux-2.6-lttng/arch/sparc64/Kconfig 2007-11-15 21:33:43.000000000 -0500
@@ -9,6 +9,7 @@ config SPARC
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config SPARC64
bool
Index: linux-2.6-lttng/kernel/Kconfig.instrumentation
===================================================================
--- linux-2.6-lttng.orig/kernel/Kconfig.instrumentation 2007-11-15 21:23:35.000000000 -0500
+++ linux-2.6-lttng/kernel/Kconfig.instrumentation 2007-11-15 21:33:43.000000000 -0500
@@ -35,7 +35,7 @@ config HAVE_OPROFILE
config KPROBES
bool "Kprobes"
depends on KALLSYMS && MODULES
- depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32
+ 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
Index: linux-2.6-lttng/arch/x86/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/x86/Kconfig 2007-11-15 21:25:00.000000000 -0500
+++ linux-2.6-lttng/arch/x86/Kconfig 2007-11-15 21:34:59.000000000 -0500
@@ -20,6 +20,7 @@ config X86
bool
default y
select HAVE_OPROFILE
+ select HAVE_KPROBES

config GENERIC_TIME
bool
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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