Messages in this thread | | | Date | Fri, 16 Apr 2010 11:24:10 -0400 | From | Jason Baron <> | Subject | [PATCH 00/11] jump label v7 |
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Hi,
Based on David Miller's suggestion this version re-works the architecture interfaces for jump labels. I have also added a documentation file, and re-freshed the patchset against the latest -tip tree.
The new architecture interface (quoting from the docs file), is as follows:
" 4) architecture interface
There are a few functions and macros which arches must implement in order to take advantage of this optimization. As previously mentioned, if there is no architecture support we simply fall back to a traditional, load, test, and jump sequence.
* add "HAVE_ARCH_JUMP_LABEL" to arch/<arch>/Kconfig to indicate support
* #define JUMP_LABEL_NOP_SIZE, arch/x86/include/asm/jump_label.h
* #define "JUMP_LABEL(tag, label, cond)", arch/x86/include/asm/jump_label.h
* add: void arch_jump_label_transform(struct jump_entry *entry, enum jump_label_type type) and const u8 *arch_get_jump_label_nop(void)
see: arch/x86/kernel/jump_label.c
* finally add a definition for "struct jump_entry". This must be done in a separate .h file, b/c the modpost.c code uses this definition to sort the the jump label tabel in the vmlinux, so that it does not have to be sorted at runtime. see: arch/x86/include/asm/jump_entry.h "
David, I re-worked the sparc64 to match the updated interfaces. The code should hopefully compile now, although I did not test the sparc bits.
thanks,
-Jason
David S. Miller (1): sparc64: Add jump_label support
Jason Baron (9): jump label: base patch jump label: x86 support jump label: tracepoint support jump label: add module support jump label: move ftrace_dyn_arch_init to common code jump label: sort jump table at build-time jump label: initialize workqueue tracepoints *before* they are registered jump label: jump_label_text_reserved() to reserve our jump points jump label: add docs
Mathieu Desnoyers (1): jump label: notifier atomic call chain notrace
Documentation/jump-label.txt | 140 +++++++++++ Makefile | 6 +- arch/Kconfig | 3 + arch/sparc/Kconfig | 1 + arch/sparc/include/asm/jump_entry.h | 16 ++ arch/sparc/include/asm/jump_label.h | 21 ++ arch/sparc/kernel/Makefile | 2 + arch/sparc/kernel/jump_label.c | 38 +++ arch/sparc/kernel/module.c | 6 + arch/x86/Kconfig | 1 + arch/x86/include/asm/alternative.h | 14 ++ arch/x86/include/asm/jump_entry.h | 28 +++ arch/x86/include/asm/jump_label.h | 23 ++ arch/x86/kernel/Makefile | 2 +- arch/x86/kernel/alternative.c | 71 ++++++- arch/x86/kernel/ftrace.c | 70 +------ arch/x86/kernel/jump_label.c | 47 ++++ arch/x86/kernel/kprobes.c | 3 +- arch/x86/kernel/module.c | 3 + arch/x86/kernel/ptrace.c | 1 + arch/x86/kernel/setup.c | 3 + include/asm-generic/vmlinux.lds.h | 22 ++- include/linux/jump_label.h | 75 ++++++ include/linux/module.h | 5 +- include/linux/tracepoint.h | 34 ++-- kernel/Makefile | 2 +- kernel/jump_label.c | 431 +++++++++++++++++++++++++++++++++++ kernel/kprobes.c | 3 +- kernel/module.c | 7 + kernel/notifier.c | 6 +- kernel/trace/ftrace.c | 13 +- kernel/trace/trace_workqueue.c | 10 +- kernel/tracepoint.c | 8 + scripts/mod/Makefile | 1 + scripts/mod/modpost.c | 71 ++++++- scripts/mod/modpost.h | 2 + 36 files changed, 1073 insertions(+), 116 deletions(-) create mode 100644 Documentation/jump-label.txt create mode 100644 arch/sparc/include/asm/jump_entry.h create mode 100644 arch/sparc/include/asm/jump_label.h create mode 100644 arch/sparc/kernel/jump_label.c create mode 100644 arch/x86/include/asm/jump_entry.h create mode 100644 arch/x86/include/asm/jump_label.h create mode 100644 arch/x86/kernel/jump_label.c create mode 100644 include/linux/jump_label.h create mode 100644 kernel/jump_label.c
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