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riscv: cpufeature: Use pre-defined ISA ext macros to index isa2hwcap

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We have pre-defined ISA extension macros, here use those macros to
replace a magic number for isa2hwcap definition and some array
indexing for isa2hwcap access.

This doesn't change the original functionality, just improve the code
maintainability and readability.

Signed-off-by: Hui Wang <hui.wang@canonical.com>
Link: https://patch.msgid.link/20260506132152.53239-1-hui.wang@canonical.com
Signed-off-by: Paul Walmsley <pjw@kernel.org>
This commit is contained in:
Hui Wang 2026-05-06 21:21:52 +08:00 committed by Paul Walmsley
parent db909bd798
commit 41337097f2
1 changed files with 8 additions and 8 deletions
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16
arch/riscv/kernel/cpufeature.c
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@ -1102,16 +1102,16 @@ early_param("riscv_isa_fallback", riscv_isa_fallback_setup);
void __init riscv_fill_hwcap(void)
{
char print_str[NUM_ALPHA_EXTS + 1];
unsigned long isa2hwcap[26] = {0};
unsigned long isa2hwcap[RISCV_ISA_EXT_BASE] = {0};
int i, j;
isa2hwcap['i' - 'a'] = COMPAT_HWCAP_ISA_I;
isa2hwcap['m' - 'a'] = COMPAT_HWCAP_ISA_M;
isa2hwcap['a' - 'a'] = COMPAT_HWCAP_ISA_A;
isa2hwcap['f' - 'a'] = COMPAT_HWCAP_ISA_F;
isa2hwcap['d' - 'a'] = COMPAT_HWCAP_ISA_D;
isa2hwcap['c' - 'a'] = COMPAT_HWCAP_ISA_C;
isa2hwcap['v' - 'a'] = COMPAT_HWCAP_ISA_V;
isa2hwcap[RISCV_ISA_EXT_i] = COMPAT_HWCAP_ISA_I;
isa2hwcap[RISCV_ISA_EXT_m] = COMPAT_HWCAP_ISA_M;
isa2hwcap[RISCV_ISA_EXT_a] = COMPAT_HWCAP_ISA_A;
isa2hwcap[RISCV_ISA_EXT_f] = COMPAT_HWCAP_ISA_F;
isa2hwcap[RISCV_ISA_EXT_d] = COMPAT_HWCAP_ISA_D;
isa2hwcap[RISCV_ISA_EXT_c] = COMPAT_HWCAP_ISA_C;
isa2hwcap[RISCV_ISA_EXT_v] = COMPAT_HWCAP_ISA_V;
if (!acpi_disabled) {
riscv_fill_hwcap_from_isa_string(isa2hwcap);