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
