[PATCH] arm64: make is_ttbrX_addr() noinstr-safe

[Will Deacon]

On Mon, 14 Nov 2022 14:40:42 +0000, Mark Rutland wrote:
> We use is_ttbr0_addr() in noinstr code, but as it's only marked as
> inline, it's theoretically possible for the compiler to place it
> out-of-line and instrument it, which would be problematic.
> 
> Mark is_ttbr0_addr() as __always_inline such that that can safely be
> used from noinstr code. For consistency, do the same to is_ttbr1_addr().
> Note that while is_ttbr1_addr() calls arch_kasan_reset_tag(), this is a
> macro (and its callees are either macros or __always_inline), so there
> is not a risk of transient instrumentation.
> 
> [...]

Applied to arm64 (for-next/trivial), thanks!

[1/1] arm64: make is_ttbrX_addr() noinstr-safe
      https://git.kernel.org/arm64/c/d8c1d798a2e5

Cheers,
-- 
Will

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