On Mon, Jan 30, 2017 at 06:08:17PM -0500, Christopher Covington wrote:
> diff --git a/arch/arm64/include/asm/tlbflush.h
> b/arch/arm64/include/asm/tlbflush.h
> index deab52374119..fc434f421c7b 100644
> --- a/arch/arm64/include/asm/tlbflush.h
> +++ b/arch/arm64/include/asm/tlbflush.h
> @@ -36,9 +36,21 @@
> * not. The macros handles invoking the asm with or without the
> * register argument as appropriate.
> */
> -#define __TLBI_0(op, arg) asm ("tlbi " #op)
> -#define __TLBI_1(op, arg) asm ("tlbi " #op ", %0" : : "r" (arg))
> -#define __TLBI_N(op, arg, n, ...) __TLBI_##n(op, arg)
> +#define __TLBI_0(op, arg) asm volatile ("tlbi " #op "\n" \
> + ALTERNATIVE("nop\n nop", \
> + "dsb ish\n tlbi " #op, \
> + ARM64_WORKAROUND_REPEAT_TLBI, \
> + CONFIG_QCOM_FALKOR_ERRATUM_1009) \
> + : : )
> +
> +#define __TLBI_1(op, arg) asm volatile ("tlbi " #op ", %0\n" \
> + ALTERNATIVE("nop\n nop", \
> + "dsb ish\n tlbi " #op ", %0", \
> + ARM64_WORKAROUND_REPEAT_TLBI, \
> + CONFIG_QCOM_FALKOR_ERRATUM_1009) \
> + : : "r" (arg))
> +
Why are these now volatile? I asked the same question on the previous
version but didn't get a response:
http://lists.infradead.org/pipermail/linux-arm-kernel/2017-January/483579.html
Will
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