(cc people whi particpaged in v2 disuccsion) On Fri, Jul 24, 2020 at 08:05:47AM +0300, Jarkko Sakkinen wrote: > Remove MODULES dependency by migrating from module_alloc() to the new > text_alloc() API. Essentially these changes provide preliminaries for > allowing to compile a static kernel with a proper tracing support. > > The same API can be used later on in other sites that allocate space for > trampolines, and trivially scaled to other arch's. An arch can inform > with CONFIG_ARCH_HAS_TEXT_ALLOC that it's providing implementation for > text_alloc(). > > Cc: linux-mm@xxxxxxxxx > Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx> > Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx> > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > > v4: > * Squash lock_modules() patches into one. > * Remove fallback versions of text_alloc() and text_free(). Instead, use > ARCH_HAS_TEXT_ALLOC at site when required. > * Use lockdep_assert_irqs_enabled() in text_free() instead of > WARN_ON(in_interrupt()). > > v3: > * Make text_alloc() API disjoint. > * Remove all the possible extra clutter not absolutely required and > split into more logical pieces. > > Jarkko Sakkinen (6): > kprobes: Remove dependency to the module_mutex > vmalloc: Add text_alloc() and text_free() > arch/x86: Implement text_alloc() and text_free() > arch/x86: kprobes: Use text_alloc() and text_free() > kprobes: Use text_alloc() and text_free() > kprobes: Remove CONFIG_MODULES dependency > > arch/Kconfig | 2 +- > arch/x86/Kconfig | 3 ++ > arch/x86/kernel/Makefile | 1 + > arch/x86/kernel/kprobes/core.c | 4 +-- > arch/x86/kernel/text_alloc.c | 41 +++++++++++++++++++++++ > include/linux/module.h | 32 ++++++++++++++---- > include/linux/vmalloc.h | 17 ++++++++++ > kernel/kprobes.c | 61 +++++++++++++++++++++++----------- > kernel/trace/trace_kprobe.c | 20 ++++++++--- > 9 files changed, 147 insertions(+), 34 deletions(-) > create mode 100644 arch/x86/kernel/text_alloc.c > > -- > 2.25.1 > -- Sincerely yours, Mike.
