Re: [PATCH V4 19/22] LoongArch: Add VDSO and VSYSCALL support

[Xi Ruoyao]

On Mon, 2021-09-27 at 14:42 +0800, Huacai Chen wrote:
> diff --git a/arch/loongarch/vdso/gen_vdso_offsets.sh
> b/arch/loongarch/vdso/gen_vdso_offsets.sh
> new file mode 100755
> index 000000000000..7da255fea213
> --- /dev/null
> +++ b/arch/loongarch/vdso/gen_vdso_offsets.sh
> @@ -0,0 +1,14 @@
> +#!/bin/sh
> +# SPDX-License-Identifier: GPL-2.0
> +
> +#
> +# Derived from RISC-V and ARM64:
> +# Author: Will Deacon <will.deacon@xxxxxxx>
> +#
> +# Match symbols in the DSO that look like VDSO_*; produce a header
> file
> +# of constant offsets into the shared object.
> +#
> +
> +LC_ALL=C

I'm wondering whether this line is really useful... There is no "export"
here so the variable won't be passed to the environment of the sed
command below.

> +sed -n -e 's/^00*/0/' -e \
> +'s/^\([0-9a-fA-F]*\) . VDSO_\([a-zA-Z0-9_]*\)$/\#define
> vdso_offset_\2\t0x\1/p'