6.12-stable review patch. If anyone has any objections, please let me know.
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From: Clément Léger cleger@rivosinc.com
commit c6ec1e1b078d8e2ecd075e46db6197a14930a3fc upstream.
Comparison of bitmaps should be done using bitmap_equal(), not memcmp(), use the former one to compare isa bitmaps.
Signed-off-by: Clément Léger cleger@rivosinc.com Fixes: 625034abd52a8c ("riscv: add ISA extensions validation callback") Reviewed-by: Alexandre Ghiti alexghiti@rivosinc.com Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250210155615.1545738-1-cleger@rivosinc.com Signed-off-by: Palmer Dabbelt palmer@rivosinc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/riscv/kernel/cpufeature.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -454,7 +454,7 @@ static void __init riscv_resolve_isa(uns if (bit < RISCV_ISA_EXT_BASE) *this_hwcap |= isa2hwcap[bit]; } - } while (loop && memcmp(prev_resolved_isa, resolved_isa, sizeof(prev_resolved_isa))); + } while (loop && !bitmap_equal(prev_resolved_isa, resolved_isa, RISCV_ISA_EXT_MAX)); }
static void __init match_isa_ext(const char *name, const char *name_end, unsigned long *bitmap)