Messages in this thread | | | Date | Wed, 24 Jun 2020 17:30:24 +0200 | From | Peter Zijlstra <> | Subject | [PATCH v5 00/17] Add static_call() |
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Hi all,
Hopefully for the last time...
static_call(), is the idea of static_branch() applied to indirect function calls. Remove a data load (indirection) by modifying the text.
The inline implementation still relies on objtool to generate the .static_call_sites section, mostly because this is a natural place for x86_64 and works for both GCC and LLVM. Other architectures can pick other means if/when they implement the inline patching. The out-of-line (aka. trampoline) variant doesn't require this.
Patches go on top of tip/objtool/core + tip/perf/core
Patches can also be found here:
git://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git x86/static_call
Changes since the last time:
- Better documentation - More consistent macro names - Changed key prefix - Folded trampoline definitions - Renamed DEFINE_STATIC_COND_CALL / DEFINE_STATIC_CALL_NULL
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