Linus Torvalds a5819099f6 Merge branch 'runtime-constants' ... Merge runtime constants infrastructure with implementations for x86 and arm64. This is one of four branches that came out of me looking at profiles of my kernel build filesystem load on my 128-core Altra arm64 system, where pathname walking and the user copies (particularly strncpy_from_user() for fetching the pathname from user space) is very hot. This is a very specialized "instruction alternatives" model where the dentry hash pointer and hash count will be constants for the lifetime of the kernel, but the allocation are not static but done early during the kernel boot. In order to avoid the pointer load and dynamic shift, we just rewrite the constants in the instructions in place. We can't use the "generic" alternative instructions infrastructure, because different architectures do it very differently, and it's actually simpler to just have very specific helpers, with a fallback to the generic ("old") model of just using variables for architectures that do not implement the runtime constant patching infrastructure. Link: https://lore.kernel.org/all/CAHk-=widPe38fUNjUOmX11ByDckaeEo9tN4Eiyke9u1SAtu9sA@mail.gmail.com/ * runtime-constants: arm64: add 'runtime constant' support runtime constants: add x86 architecture support runtime constants: add default dummy infrastructure vfs: dcache: move hashlen_hash() from callers into d_hash()		2024-07-15 08:36:13 -07:00
..
bitops	bitops: Change function return types from long to int	2024-05-03 17:04:50 +02:00
vdso
access_ok.h	uaccess: remove CONFIG_SET_FS	2022-02-25 09:36:06 +01:00
agp.h	char/agp: introduce asm-generic/agp.h	2023-02-13 22:13:29 +01:00
archrandom.h	random: handle archrandom with multiple longs	2022-07-25 13:26:14 +02:00
asm-offsets.h
asm-prototypes.h
atomic64.h	locking/atomic: delete !ARCH_ATOMIC remnants	2021-05-26 13:20:52 +02:00
atomic.h	locking/atomic: make atomic*_{cmp,}xchg optional	2023-06-05 09:57:14 +02:00
audit_change_attr.h
audit_dir_write.h
audit_read.h
audit_signal.h
audit_write.h
barrier.h	sched: Add missing memory barrier in switch_mm_cid	2024-04-16 13:59:45 +02:00
bitops.h	include: move find.h from asm_generic to linux	2022-01-15 08:47:31 -08:00
bitsperlong.h	lib: extend the scope of small_const_nbits() macro	2021-05-06 19:24:11 -07:00
bug.h	bug: Improve comment	2024-05-07 14:20:48 +02:00
cache.h
cacheflush.h	mm: Introduce flush_cache_vmap_early()	2023-12-14 00:23:17 -08:00
cfi.h	cfi: Flip headers	2023-12-15 16:25:55 -08:00
checksum.h	asm-generic: Improve csum_fold	2024-01-17 17:52:29 -08:00
cmpxchg-local.h	asm-generic: Fix 32 bit __generic_cmpxchg_local	2024-01-05 23:19:14 +01:00
cmpxchg.h	asm-generic: avoid __generic_cmpxchg_local warnings	2023-04-04 17:58:11 +02:00
codetag.lds.h	lib: add allocation tagging support for memory allocation profiling	2024-04-25 20:55:52 -07:00
compat.h	asm-generic: compat: fix compat_arg_u64() and compat_arg_u64_dual()	2022-11-01 10:20:11 +11:00
current.h	asm-generic: current: Don't include thread-info.h if building asm	2023-08-26 22:38:49 +02:00
delay.h
device.h
div64.h	ARM: 9117/1: asm-generic: div64: Remove always-true __div64_const32_is_OK()	2021-08-20 11:39:28 +01:00
dma-mapping.h	dma-mapping: no need to pass a bus_type into get_arch_dma_ops()	2023-02-15 12:35:20 +01:00
dma.h
early_ioremap.h	mm/early_ioremap.c: remove redundant early_ioremap_shutdown()	2021-09-08 11:50:24 -07:00
emergency-restart.h
error-injection.h	docs: fault-injection: add requirements of error injectable functions	2023-02-02 22:50:00 -08:00
exec.h
extable.h
fixmap.h
flat.h
ftrace.h
futex.h	futex: Fix additional regressions	2021-12-11 23:31:51 +01:00
getorder.h	asm-generic: force inlining of get_order() to work around gcc10 poor decision	2020-12-15 22:46:15 -08:00
hardirq.h	irqstat: Move declaration into asm-generic/hardirq.h	2020-11-23 10:31:06 +01:00
hugetlb.h	mm: hugetlb: add huge page size param to set_huge_pte_at()	2023-09-29 17:20:47 -07:00
hw_irq.h
hyperv-tlfs.h	hyperv-fixes for v6.9-rc4	2024-04-11 16:23:56 -07:00
int-ll64.h
io.h	asm-generic/io.h: kill vmalloc.h dependency	2024-04-25 20:55:50 -07:00
ioctl.h
iomap.h	asm-generic/iomap.h: remove ARCH_HAS_IOREMAP_xx macros	2023-08-18 10:12:32 -07:00
irq_regs.h
irq_work.h
irq.h
irqflags.h
Kbuild	runtime constants: add default dummy infrastructure	2024-06-19 12:34:34 -07:00
kdebug.h
kmap_size.h	mm/highmem: Provide and use CONFIG_DEBUG_KMAP_LOCAL	2020-11-24 14:42:08 +01:00
kprobes.h	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
kvm_para.h
kvm_types.h	KVM: Move x86's version of struct kvm_mmu_memory_cache to common code	2020-07-09 13:29:42 -04:00
linkage.h
local64.h	locking/generic: Wire up local{,64}_try_cmpxchg()	2023-04-29 09:09:09 +02:00
local.h	locking/generic: Wire up local{,64}_try_cmpxchg()	2023-04-29 09:09:09 +02:00
logic_io.h	logic_io instance of iounmap() needs volatile on argument	2021-12-21 21:31:08 +01:00
mcs_spinlock.h
memory_model.h	mm, arch: add generic implementation of pfn_valid() for FLATMEM	2023-02-09 16:51:41 -08:00
mm_hooks.h
mmiowb_types.h
mmiowb.h	asm-generic/mmiowb: Allow mmiowb_set_pending() when preemptible()	2020-07-17 10:02:03 +01:00
mmu_context.h	asm-generic: add generic MMU versions of mmu context functions	2020-10-26 16:45:03 +01:00
mmu.h
module.h
module.lds.h	kbuild: preprocess module linker script	2020-09-25 00:36:41 +09:00
mshyperv.h	hyperv-fixes for v6.9-rc4	2024-04-11 16:23:56 -07:00
msi.h	genirq: Get rid of GENERIC_MSI_IRQ_DOMAIN	2022-11-17 15:15:20 +01:00
nommu_context.h	asm-generic: add generic MMU versions of mmu context functions	2020-10-26 16:45:03 +01:00
numa.h	arm64: irq: set the correct node for VMAP stack	2023-12-05 14:26:50 +00:00
param.h
parport.h
pci_iomap.h	PCI: Stub __pci_ioport_map() for arches that don't support it at all	2022-07-29 12:01:00 -05:00
pci.h	asm-generic: Add new pci.h and use it	2022-07-22 17:34:57 -05:00
percpu.h	percpu: Fix self-assignment of __old in raw_cpu_generic_try_cmpxchg()	2023-06-08 10:28:39 +02:00
pgalloc.h	mm: change inlined allocation helpers to account at the call site	2024-04-25 20:55:59 -07:00
pgtable_uffd.h
pgtable-nop4d.h	mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *	2021-07-08 11:48:22 -07:00
pgtable-nopmd.h	mm: recover pud_leaf() definitions in nopmd case	2024-03-13 12:12:21 -07:00
pgtable-nopud.h	mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *	2021-07-08 11:48:22 -07:00
preempt.h	riscv: support PREEMPT_DYNAMIC with static keys	2023-08-31 00:18:34 -07:00
qrwlock_types.h	locking/qrwlock: Change "queue rwlock" to "queued rwlock"	2022-05-11 16:27:04 +02:00
qrwlock.h	asm-generic changes for 5.19	2022-05-26 10:50:30 -07:00
qspinlock_types.h	locking/qspinlock: Do not include atomic.h from qspinlock_types.h	2020-07-29 16:14:19 +02:00
qspinlock.h	asm-generic: qspinlock: fix queued_spin_value_unlocked() implementation	2023-11-22 09:32:49 -08:00
resource.h
runtime-const.h	runtime constants: add default dummy infrastructure	2024-06-19 12:34:34 -07:00
rwonce.h	asm/rwonce: Don't pull <asm/barrier.h> into 'asm-generic/rwonce.h'	2020-07-21 10:50:36 +01:00
seccomp.h	seccomp: Use -1 marker for end of mode 1 syscall list	2020-07-10 16:01:52 -07:00
sections.h	jump_label,module: Don't alloc static_key_mod for __ro_after_init keys	2024-03-22 11:18:16 +01:00
serial.h
set_memory.h
shmparam.h
signal.h	asm-generic: Remove empty #ifdef SA_RESTORER	2022-09-10 09:56:53 +02:00
simd.h
softirq_stack.h	asm-generic: Conditionally enable do_softirq_own_stack() via Kconfig.	2022-09-05 17:20:55 +02:00
spinlock_types.h	asm-generic: ticket-lock: New generic ticket-based spinlock	2022-05-11 11:49:38 -07:00
spinlock.h	asm-generic: ticket-lock: Optimize arch_spin_value_unlocked()	2023-09-21 10:17:00 +02:00
statfs.h
string.h
switch_to.h
syscall.h	ptrace: Create ptrace_report_syscall_{entry,exit} in ptrace.h	2022-03-10 13:35:08 -06:00
syscalls.h	syscalls: mmap(): use unsigned offset type consistently	2024-06-25 15:57:38 +02:00
timex.h
tlb.h	mm/mmu_gather: add __tlb_remove_folio_pages()	2024-02-22 15:27:17 -08:00
tlbflush.h
topology.h	mm: replace CONFIG_NEED_MULTIPLE_NODES with CONFIG_NUMA	2021-06-29 10:53:55 -07:00
trace_clock.h
uaccess.h	uaccess: remove CONFIG_SET_FS	2022-02-25 09:36:06 +01:00
unaligned.h	asm-generic: make sparse happy with odd-sized put_unaligned_*()	2024-01-08 09:48:35 -08:00
user.h
vermagic.h
vga.h
video.h	arch: Rename fbdev header and source files	2024-05-03 17:07:50 +02:00
vmlinux.lds.h	runtime constants: add default dummy infrastructure	2024-06-19 12:34:34 -07:00
word-at-a-time.h	kernel.h: removed REPEAT_BYTE from kernel.h	2024-02-01 09:47:59 -08:00
xor.h	lib/xor: make xor prototypes more friendly to compiler vectorization	2022-02-11 20:39:39 +11:00