From: Clément Léger Date: Mon, 10 Feb 2025 15:56:14 +0000 (+0100) Subject: riscv: cpufeature: use bitmap_equal() instead of memcmp() X-Git-Tag: v6.12.18~12 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a3c5eb88f0babe559425e919a18ebb4f28f45ab1;p=thirdparty%2Fkernel%2Fstable.git riscv: cpufeature: use bitmap_equal() instead of memcmp() 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 Fixes: 625034abd52a8c ("riscv: add ISA extensions validation callback") Reviewed-by: Alexandre Ghiti Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/20250210155615.1545738-1-cleger@rivosinc.com Signed-off-by: Palmer Dabbelt Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 3a8eeaa9310c3..308430af3e8f8 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -454,7 +454,7 @@ static void __init riscv_resolve_isa(unsigned long *source_isa, 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)