From d8df465bc46d1d6169a05dd55f82ec0dfa639a31 Mon Sep 17 00:00:00 2001 From: Matt Turner Date: Sat, 5 Sep 2026 15:29:28 -0400 Subject: [PATCH] alpha: select ARCH_HAS_FAST_MULTIPLIER All Alpha CPUs have hardware integer multiply (MULL/MULQ). EV4 and EV5 implement it in microcode; EV56 and later have fast single-cycle multiply. Since no EV4 system is likely to run a modern kernel, select this unconditionally to enable multiply-based fast paths in hweight and string routines. Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Matt Turner Tested-by: Magnus Lindholm Reviewed-by: Magnus Lindholm Link: https://lore.kernel.org/r/20260905-arch-kconfig-options-v2-v2-7-83e8245761a2@gmail.com Signed-off-by: Magnus Lindholm --- arch/alpha/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/alpha/Kconfig b/arch/alpha/Kconfig index d039b7135d18..2672971b83f3 100644 --- a/arch/alpha/Kconfig +++ b/arch/alpha/Kconfig @@ -7,6 +7,7 @@ config ALPHA select ARCH_32BIT_USTAT_F_TINODE select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DMA_OPS if PCI + select ARCH_HAS_FAST_MULTIPLIER select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_UBSAN select ARCH_MIGHT_HAVE_PC_PARPORT