6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Clément Léger <cleger@xxxxxxxxxxxx>
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@xxxxxxxxxxxx>
Fixes: 625034abd52a8c ("riscv: add ISA extensions validation callback")
Reviewed-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20250210155615.1545738-1-cleger@xxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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)
