Peter Zijlstra ab3257042c jump_label, x86: Allow short NOPs ... Now that objtool is able to rewrite jump_label instructions, have the compiler emit a JMP, such that it can decide on the optimal encoding, and set jump_entry::key bit1 to indicate that objtool should rewrite the instruction to a matching NOP. For x86_64-allyesconfig this gives: jl\ NOP JMP short: 22997 124 long: 30874 90 IOW, we save (22997+124) * 3 bytes of kernel text in hotpaths. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20210506194158.216763632@infradead.org		2021-05-12 14:54:56 +02:00
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asm	jump_label, x86: Allow short NOPs	2021-05-12 14:54:56 +02:00
uapi/asm	ARM:	2021-05-01 10:14:08 -07:00