arm64/kprobes: Tidy up sign-extension usage

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Kprobes does not need its own homebrewed (and frankly inscrutable) sign
extension macro; just use the standard kernel functions instead. Since
the compiler actually recognises the sign-extension idiom of the latter,
we also get the small bonus of some nicer codegen, as each displacement
calculation helper then compiles to a single optimal SBFX instruction.

Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Robin Murphy 2016-10-18 13:46:27 +01:00 • committed by Catalin Marinas

parent be8f185d8a

commit 4890ae4691

1 changed files with 7 additions and 9 deletions

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arch/arm64/kernel/probes/simulate-insn.c

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