Jiri Olsa dbe69b2998 bpf: Fix dispatcher patchable function entry to 5 bytes nop ... The patchable_function_entry(5) might output 5 single nop instructions (depends on toolchain), which will clash with bpf_arch_text_poke check for 5 bytes nop instruction. Adding early init call for dispatcher that checks and change the patchable entry into expected 5 nop instruction if needed. There's no need to take text_mutex, because we are using it in early init call which is called at pre-smp time. Fixes: ceea991a01 ("bpf: Move bpf_dispatcher function out of ftrace locations") Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/r/20221018075934.574415-1-jolsa@kernel.org Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2022-10-20 18:57:51 -07:00
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Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
bpf_jit_comp.c	bpf: Fix dispatcher patchable function entry to 5 bytes nop	2022-10-20 18:57:51 -07:00
bpf_jit_comp32.c	bpf: Change value of MAX_TAIL_CALL_CNT from 32 to 33	2021-11-16 14:03:15 +01:00