From: Andy Chiu Date: Thu, 9 May 2024 16:26:51 +0000 (+0800) Subject: riscv: vector: add a comment when calling riscv_setup_vsize() X-Git-Tag: v6.11-rc1~94^2~13^2~7 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=77afe3e514b89a12143c89d263cfe2365672cfc3;p=thirdparty%2Fkernel%2Flinux.git riscv: vector: add a comment when calling riscv_setup_vsize() The function would fail when it detects the calling hart's vlen doesn't match the first one's. The boot hart is the first hart calling this function during riscv_fill_hwcap, so it is impossible to fail here. Add a comment about this behavior. Signed-off-by: Andy Chiu Reviewed-by: Conor Dooley Link: https://lore.kernel.org/r/20240510-zve-detection-v5-1-0711bdd26c12@sifive.com Signed-off-by: Palmer Dabbelt --- diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 5ef48cb20ee11..ccba085480040 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -687,6 +687,9 @@ void __init riscv_fill_hwcap(void) } if (elf_hwcap & COMPAT_HWCAP_ISA_V) { + /* + * This cannot fail when called on the boot hart + */ riscv_v_setup_vsize(); /* * ISA string in device tree might have 'v' flag, but