From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- lib/crc/loongarch/crc32.h | 115 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 115 insertions(+) create mode 100644 lib/crc/loongarch/crc32.h (limited to 'lib/crc/loongarch') diff --git a/lib/crc/loongarch/crc32.h b/lib/crc/loongarch/crc32.h new file mode 100644 index 000000000..d34fa4c68 --- /dev/null +++ b/lib/crc/loongarch/crc32.h @@ -0,0 +1,115 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * CRC32 and CRC32C using LoongArch crc* instructions + * + * Module based on mips/crypto/crc32-mips.c + * + * Copyright (C) 2014 Linaro Ltd + * Copyright (C) 2018 MIPS Tech, LLC + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include +#include + +#define _CRC32(crc, value, size, type) \ +do { \ + __asm__ __volatile__( \ + #type ".w." #size ".w" " %0, %1, %0\n\t"\ + : "+r" (crc) \ + : "r" (value) \ + : "memory"); \ +} while (0) + +#define CRC32(crc, value, size) _CRC32(crc, value, size, crc) +#define CRC32C(crc, value, size) _CRC32(crc, value, size, crcc) + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_crc32); + +static inline u32 crc32_le_arch(u32 crc, const u8 *p, size_t len) +{ + if (!static_branch_likely(&have_crc32)) + return crc32_le_base(crc, p, len); + + while (len >= sizeof(u64)) { + u64 value = get_unaligned_le64(p); + + CRC32(crc, value, d); + p += sizeof(u64); + len -= sizeof(u64); + } + + if (len & sizeof(u32)) { + u32 value = get_unaligned_le32(p); + + CRC32(crc, value, w); + p += sizeof(u32); + } + + if (len & sizeof(u16)) { + u16 value = get_unaligned_le16(p); + + CRC32(crc, value, h); + p += sizeof(u16); + } + + if (len & sizeof(u8)) { + u8 value = *p++; + + CRC32(crc, value, b); + } + + return crc; +} + +static inline u32 crc32c_arch(u32 crc, const u8 *p, size_t len) +{ + if (!static_branch_likely(&have_crc32)) + return crc32c_base(crc, p, len); + + while (len >= sizeof(u64)) { + u64 value = get_unaligned_le64(p); + + CRC32C(crc, value, d); + p += sizeof(u64); + len -= sizeof(u64); + } + + if (len & sizeof(u32)) { + u32 value = get_unaligned_le32(p); + + CRC32C(crc, value, w); + p += sizeof(u32); + } + + if (len & sizeof(u16)) { + u16 value = get_unaligned_le16(p); + + CRC32C(crc, value, h); + p += sizeof(u16); + } + + if (len & sizeof(u8)) { + u8 value = *p++; + + CRC32C(crc, value, b); + } + + return crc; +} + +#define crc32_be_arch crc32_be_base /* not implemented on this arch */ + +#define crc32_mod_init_arch crc32_mod_init_arch +static void crc32_mod_init_arch(void) +{ + if (cpu_has_crc32) + static_branch_enable(&have_crc32); +} + +static inline u32 crc32_optimizations_arch(void) +{ + if (static_key_enabled(&have_crc32)) + return CRC32_LE_OPTIMIZATION | CRC32C_OPTIMIZATION; + return 0; +} -- cgit v1.3.1