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| author | Breno Leitao <leitao@debian.org> | 2026-08-05 07:52:36 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2026-08-10 11:47:20 -1000 |
| commit | a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 (patch) | |
| tree | 39f5b258386e1127d253d293194e9a2991bf3c34 /lib/crypto/arm/sha256.h | |
| download | linux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.tar.gz linux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.zip | |
workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted
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 <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'lib/crypto/arm/sha256.h')
| -rw-r--r-- | lib/crypto/arm/sha256.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/crypto/arm/sha256.h b/lib/crypto/arm/sha256.h new file mode 100644 index 000000000..ae7e52dd6 --- /dev/null +++ b/lib/crypto/arm/sha256.h @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * SHA-256 optimized for ARM + * + * Copyright 2025 Google LLC + */ +#include <asm/neon.h> +#include <asm/simd.h> + +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon); +static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_ce); + +asmlinkage void sha256_block_data_order(struct sha256_block_state *state, + const u8 *data, size_t nblocks); +asmlinkage void sha256_block_data_order_neon(struct sha256_block_state *state, + const u8 *data, size_t nblocks); +asmlinkage void sha256_ce_transform(struct sha256_block_state *state, + const u8 *data, size_t nblocks); + +static void sha256_blocks(struct sha256_block_state *state, + const u8 *data, size_t nblocks) +{ + if (IS_ENABLED(CONFIG_KERNEL_MODE_NEON) && + static_branch_likely(&have_neon) && likely(may_use_simd())) { + scoped_ksimd() { + if (static_branch_likely(&have_ce)) + sha256_ce_transform(state, data, nblocks); + else + sha256_block_data_order_neon(state, data, nblocks); + } + } else { + sha256_block_data_order(state, data, nblocks); + } +} + +#ifdef CONFIG_KERNEL_MODE_NEON +#define sha256_mod_init_arch sha256_mod_init_arch +static void sha256_mod_init_arch(void) +{ + if (elf_hwcap & HWCAP_NEON) { + static_branch_enable(&have_neon); + if (elf_hwcap2 & HWCAP2_SHA2) + static_branch_enable(&have_ce); + } +} +#endif /* CONFIG_KERNEL_MODE_NEON */ |