[PATCH -fixes] riscv: cpufeature: Do not drop Linux-internal extensions

[Samuel Holland]

On 2024-07-18 4:29 PM, Samuel Holland wrote:
> The Linux-internal Xlinuxenvcfg ISA extension is omitted from the
> riscv_isa_ext array because it has no DT binding and should not appear
> in /proc/cpuinfo. The logic added in commit 625034abd52a ("riscv: add
> ISA extensions validation callback") assumes all extensions are included
> in riscv_isa_ext, and so riscv_resolve_isa() wrongly drops Xlinuxenvcfg
> from the final ISA string. Instead, accept such Linux-internal ISA
> extensions as if they have no validation callback.
> 
> Fixes: 625034abd52a ("riscv: add ISA extensions validation callback")

Apologies for the incorrect subject line. This fixes a commit in for-next, so
this patch is targeting for-next.

> Signed-off-by: Samuel Holland <samuel.holland at sifive.com>
> ---
> 
>  arch/riscv/kernel/cpufeature.c | 14 ++++++--------
>  1 file changed, 6 insertions(+), 8 deletions(-)