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 ARCH_SUPPORTS_KPROBES
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...
Signed-off-by: Mathieu Desnoyers <[email protected]>
CC: Linus Torvalds <[email protected]>
CC: Sam Ravnborg <[email protected]>
---
arch/avr32/Kconfig | 3 +++
arch/ia64/Kconfig | 3 +++
arch/powerpc/Kconfig | 3 +++
arch/ppc/Kconfig | 3 +++
arch/s390/Kconfig | 3 +++
arch/sparc64/Kconfig | 3 +++
arch/x86/Kconfig.i386 | 3 +++
arch/x86/Kconfig.x86_64 | 3 +++
kernel/Kconfig.instrumentation | 2 +-
9 files changed, 25 insertions(+), 1 deletion(-)
Index: linux-2.6-lttng/arch/avr32/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/avr32/Kconfig 2007-11-02 13:20:47.000000000 -0400
+++ linux-2.6-lttng/arch/avr32/Kconfig 2007-11-02 13:20:57.000000000 -0400
@@ -70,6 +70,9 @@ config GENERIC_BUG
default y
depends on BUG
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
source "init/Kconfig"
menu "System Type and features"
Index: linux-2.6-lttng/arch/ia64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/ia64/Kconfig 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/ia64/Kconfig 2007-11-02 13:20:57.000000000 -0400
@@ -102,6 +102,9 @@ config AUDIT_ARCH
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
choice
prompt "System type"
default IA64_GENERIC
Index: linux-2.6-lttng/arch/powerpc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/powerpc/Kconfig 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/powerpc/Kconfig 2007-11-02 13:20:57.000000000 -0400
@@ -166,6 +166,9 @@ config PPC_OF_PLATFORM_PCI
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
source "init/Kconfig"
source "arch/powerpc/platforms/Kconfig"
Index: linux-2.6-lttng/arch/ppc/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/Kconfig 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/ppc/Kconfig 2007-11-02 13:20:57.000000000 -0400
@@ -72,6 +72,9 @@ config GENERIC_BUG
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
source "init/Kconfig"
menu "Processor"
Index: linux-2.6-lttng/arch/s390/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/s390/Kconfig 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/s390/Kconfig 2007-11-02 13:20:57.000000000 -0400
@@ -55,6 +55,9 @@ config S390
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
source "init/Kconfig"
menu "Base setup"
Index: linux-2.6-lttng/arch/sparc64/Kconfig
===================================================================
--- linux-2.6-lttng.orig/arch/sparc64/Kconfig 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/sparc64/Kconfig 2007-11-02 13:20:57.000000000 -0400
@@ -79,6 +79,9 @@ config GENERIC_HARDIRQS_NO__DO_IRQ
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
choice
prompt "Kernel page size"
default SPARC64_PAGE_SIZE_8KB
Index: linux-2.6-lttng/arch/x86/Kconfig.i386
===================================================================
--- linux-2.6-lttng.orig/arch/x86/Kconfig.i386 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/x86/Kconfig.i386 2007-11-02 13:20:57.000000000 -0400
@@ -94,6 +94,9 @@ config DMI
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
source "init/Kconfig"
menu "Processor type and features"
Index: linux-2.6-lttng/arch/x86/Kconfig.x86_64
===================================================================
--- linux-2.6-lttng.orig/arch/x86/Kconfig.x86_64 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/arch/x86/Kconfig.x86_64 2007-11-02 13:20:57.000000000 -0400
@@ -136,6 +136,9 @@ config ARCH_HAS_ILOG2_U64
config ARCH_SUPPORTS_OPROFILE
def_bool y
+config ARCH_SUPPORTS_KPROBES
+ def_bool y
+
source "init/Kconfig"
Index: linux-2.6-lttng/kernel/Kconfig.instrumentation
===================================================================
--- linux-2.6-lttng.orig/kernel/Kconfig.instrumentation 2007-11-02 13:20:54.000000000 -0400
+++ linux-2.6-lttng/kernel/Kconfig.instrumentation 2007-11-02 13:20:57.000000000 -0400
@@ -32,7 +32,7 @@ config OPROFILE
config KPROBES
bool "Kprobes"
depends on KALLSYMS && MODULES
- depends on X86_32 || IA64 || PPC || S390 || SPARC64 || X86_64 || AVR32
+ depends on ARCH_SUPPORTS_KPROBES
help
Kprobes allows you to trap at almost any kernel address and
execute a callback function. register_kprobe() establishes
--
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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