diff --git a/include/linux/objpool.h b/include/linux/objpool.h
new file mode 100644
index 000000000000..33c832216b98
--- /dev/null
+++ b/include/linux/objpool.h
@@ -0,0 +1,174 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+#ifndef _LINUX_OBJPOOL_H
+#define _LINUX_OBJPOOL_H
+
+#include <linux/types.h>
+#include <linux/refcount.h>
+
+/*
+ * objpool: ring-array based lockless MPMC queue
+ *
+ * Copyright: wuqiang.matt@bytedance.com
+ *
+ * The object pool is a scalable implementaion of high performance queue
+ * for objects allocation and reclamation, such as kretprobe instances.
+ *
+ * With leveraging per-cpu ring-array to mitigate the hot spots of memory
+ * contention, it could deliver near-linear scalability for high parallel
+ * scenarios. The ring-array is compactly managed in a single cache-line
+ * to benefit from warmed L1 cache for most cases (<= 4 objects per-core).
+ * The body of pre-allocated objects is stored in continuous cache-lines
+ * just after the ring-array.
+ *
+ * The object pool is interrupt safe. Both allocation and reclamation
+ * (object pop and push operations) can be preemptible or interruptable.
+ *
+ * It's best suited for following cases:
+ * 1) Memory allocation or reclamation are prohibited or too expensive
+ * 2) Consumers are of different priorities, such as irqs and threads
+ *
+ * Limitations:
+ * 1) Maximum objects (capacity) is determined during pool initializing
+ * 2) The memory of objects won't be freed until the pool is finalized
+ * 3) Object allocation (pop) may fail after trying all cpu slots
+ */
+
+/**
+ * struct objpool_slot - percpu ring array of objpool
+ * @head: head of the local ring array (to retrieve at)
+ * @tail: tail of the local ring array (to append at)
+ * @bits: log2 of capacity (for bitwise operations)
+ * @mask: capacity - 1
+ *
+ * Represents a cpu-local array-based ring buffer, its size is specialized
+ * during initialization of object pool. The percpu objpool slot is to be
+ * allocated from local memory for NUMA system, and to be kept compact in
+ * continuous memory: ages[] is stored just after the body of objpool_slot,
+ * and then entries[]. ages[] describes revision of each item, solely used
+ * to avoid ABA; entries[] contains pointers of the actual objects
+ *
+ * Layout of objpool_slot in memory:
+ *
+ * 64bit:
+ *        4      8      12     16        32                 64
+ * | head | tail | bits | mask | ages[4] | ents[4]: (8 * 4) | objects
+ *
+ * 32bit:
+ *        4      8      12     16        32        48       64
+ * | head | tail | bits | mask | ages[4] | ents[4] | unused | objects
+ *
+ */
+struct objpool_slot {
+	uint32_t                head;
+	uint32_t                tail;
+	uint32_t                bits;
+	uint32_t                mask;
+} __packed;
+
+struct objpool_head;
+
+/*
+ * caller-specified callback for object initial setup, it's only called
+ * once for each object (just after the memory allocation of the object)
+ */
+typedef int (*objpool_init_obj_cb)(void *obj, void *context);
+
+/* caller-specified cleanup callback for objpool destruction */
+typedef int (*objpool_fini_cb)(struct objpool_head *head, void *context);
+
+/**
+ * struct objpool_head - object pooling metadata
+ * @obj_size:   object & element size
+ * @nr_objs:    total objs (to be pre-allocated)
+ * @nr_cpus:    nr_cpu_ids
+ * @capacity:   max objects per cpuslot
+ * @gfp:        gfp flags for kmalloc & vmalloc
+ * @ref:        refcount for objpool
+ * @flags:      flags for objpool management
+ * @cpu_slots:  array of percpu slots
+ * @slot_sizes:	size in bytes of slots
+ * @release:    resource cleanup callback
+ * @context:    caller-provided context
+ */
+struct objpool_head {
+	int                     obj_size;
+	int                     nr_objs;
+	int                     nr_cpus;
+	int                     capacity;
+	gfp_t                   gfp;
+	refcount_t              ref;
+	unsigned long           flags;
+	struct objpool_slot   **cpu_slots;
+	int                    *slot_sizes;
+	objpool_fini_cb         release;
+	void                   *context;
+};
+
+#define OBJPOOL_FROM_VMALLOC	(0x800000000)	/* objpool allocated from vmalloc area */
+#define OBJPOOL_HAVE_OBJECTS	(0x400000000)	/* objects allocated along with objpool */
+
+/**
+ * objpool_init() - initialize objpool and pre-allocated objects
+ * @head:    the object pool to be initialized, declared by caller
+ * @nr_objs: total objects to be pre-allocated by this object pool
+ * @object_size: size of an object (should be > 0)
+ * @gfp:     flags for memory allocation (via kmalloc or vmalloc)
+ * @context: user context for object initialization callback
+ * @objinit: object initialization callback for extra setup
+ * @release: cleanup callback for extra cleanup task
+ *
+ * return value: 0 for success, otherwise error code
+ *
+ * All pre-allocated objects are to be zeroed after memory allocation.
+ * Caller could do extra initialization in objinit callback. objinit()
+ * will be called just after slot allocation and will be only once for
+ * each object. Since then the objpool won't touch any content of the
+ * objects. It's caller's duty to perform reinitialization after each
+ * pop (object allocation) or do clearance before each push (object
+ * reclamation).
+ */
+int objpool_init(struct objpool_head *head, int nr_objs, int object_size,
+		 gfp_t gfp, void *context, objpool_init_obj_cb objinit,
+		 objpool_fini_cb release);
+
+/**
+ * objpool_pop() - allocate an object from objpool
+ * @head: object pool
+ *
+ * return value: object ptr or NULL if failed
+ */
+void *objpool_pop(struct objpool_head *head);
+
+/**
+ * objpool_push() - reclaim the object and return back to objpool
+ * @obj:  object ptr to be pushed to objpool
+ * @head: object pool
+ *
+ * return: 0 or error code (it fails only when user tries to push
+ * the same object multiple times or wrong "objects" into objpool)
+ */
+int objpool_push(void *obj, struct objpool_head *head);
+
+/**
+ * objpool_drop() - discard the object and deref objpool
+ * @obj:  object ptr to be discarded
+ * @head: object pool
+ *
+ * return: 0 if objpool was released or error code
+ */
+int objpool_drop(void *obj, struct objpool_head *head);
+
+/**
+ * objpool_free() - release objpool forcely (all objects to be freed)
+ * @head: object pool to be released
+ */
+void objpool_free(struct objpool_head *head);
+
+/**
+ * objpool_fini() - deref object pool (also releasing unused objects)
+ * @head: object pool to be dereferenced
+ */
+void objpool_fini(struct objpool_head *head);
+
+#endif /* _LINUX_OBJPOOL_H */
diff --git a/lib/Makefile b/lib/Makefile
index 1ffae65bb7ee..7a84c922d9ff 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -34,7 +34,7 @@ lib-y := ctype.o string.o vsprintf.o cmdline.o \
 	 is_single_threaded.o plist.o decompress.o kobject_uevent.o \
 	 earlycpio.o seq_buf.o siphash.o dec_and_lock.o \
 	 nmi_backtrace.o win_minmax.o memcat_p.o \
-	 buildid.o
+	 buildid.o objpool.o
 
 lib-$(CONFIG_PRINTK) += dump_stack.o
 lib-$(CONFIG_SMP) += cpumask.o
diff --git a/lib/objpool.c b/lib/objpool.c
new file mode 100644
index 000000000000..22e752371820
--- /dev/null
+++ b/lib/objpool.c
@@ -0,0 +1,338 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#include <linux/objpool.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/atomic.h>
+#include <linux/prefetch.h>
+#include <linux/irqflags.h>
+#include <linux/cpumask.h>
+#include <linux/log2.h>
+
+/*
+ * objpool: ring-array based lockless MPMC/FIFO queues
+ *
+ * Copyright: wuqiang.matt@bytedance.com
+ */
+
+#define SLOT_AGES(s) ((uint32_t *)((char *)(s) + sizeof(struct objpool_slot)))
+#define SLOT_ENTS(s) ((void **)((char *)(s) + sizeof(struct objpool_slot) + \
+			(sizeof(uint32_t) << (s)->bits)))
+#define SLOT_OBJS(s) ((void *)((char *)(s) + sizeof(struct objpool_slot) + \
+			((sizeof(uint32_t) + sizeof(void *)) << (s)->bits)))
+#define SLOT_CORE(n) cpumask_nth((n) % num_possible_cpus(), cpu_possible_mask)
+
+/* compute the suitable num of objects to be managed per slot */
+static int objpool_nobjs(int size)
+{
+	return rounddown_pow_of_two((size - sizeof(struct objpool_slot)) /
+			(sizeof(uint32_t) + sizeof(void *)));
+}
+
+/* allocate and initialize percpu slots */
+static int
+objpool_init_percpu_slots(struct objpool_head *head, int nobjs,
+			void *context, objpool_init_obj_cb objinit)
+{
+	int i, j, n, size, objsz, cpu = 0, nents = head->capacity;
+
+	/* aligned object size by sizeof(void *) */
+	objsz = ALIGN(head->obj_size, sizeof(void *));
+	/* shall we allocate objects along with percpu-slot */
+	if (objsz)
+		head->flags |= OBJPOOL_HAVE_OBJECTS;
+
+	/* vmalloc is used in default to allocate percpu-slots */
+	if (!(head->gfp & GFP_ATOMIC))
+		head->flags |= OBJPOOL_FROM_VMALLOC;
+
+	for (i = 0; i < head->nr_cpus; i++) {
+		struct objpool_slot *os;
+
+		/* skip the cpus which could never be present */
+		if (!cpu_possible(i))
+			continue;
+
+		/* compute how many objects to be managed by this slot */
+		n = nobjs / num_possible_cpus();
+		if (cpu < (nobjs % num_possible_cpus()))
+			n++;
+		size = sizeof(struct objpool_slot) + sizeof(void *) * nents +
+		       sizeof(uint32_t) * nents + objsz * n;
+
+		/*
+		 * here we allocate percpu-slot & objects together in a single
+		 * allocation, taking advantage of warm caches and TLB hits as
+		 * vmalloc always aligns the request size to pages
+		 */
+		if (head->flags & OBJPOOL_FROM_VMALLOC)
+			os = __vmalloc_node(size, sizeof(void *), head->gfp,
+				cpu_to_node(i), __builtin_return_address(0));
+		else
+			os = kmalloc_node(size, head->gfp, cpu_to_node(i));
+		if (!os)
+			return -ENOMEM;
+
+		/* initialize percpu slot for the i-th slot */
+		memset(os, 0, size);
+		os->bits = ilog2(head->capacity);
+		os->mask = head->capacity - 1;
+		head->cpu_slots[i] = os;
+		head->slot_sizes[i] = size;
+		cpu = cpu + 1;
+
+		/*
+		 * manually set head & tail to avoid possible conflict:
+		 * We assume that the head item is ready for retrieval
+		 * iff head is equal to ages[head & mask]. but ages is
+		 * initialized as 0, so in view of the caller of pop(),
+		 * the 1st item (0th) is always ready, but the reality
+		 * could be: push() is stalled before the final update,
+		 * thus the item being inserted will be lost forever
+		 */
+		os->head = os->tail = head->capacity;
+
+		if (!objsz)
+			continue;
+
+		for (j = 0; j < n; j++) {
+			uint32_t *ages = SLOT_AGES(os);
+			void **ents = SLOT_ENTS(os);
+			void *obj = SLOT_OBJS(os) + j * objsz;
+			uint32_t ie = os->tail & os->mask;
+
+			/* perform object initialization */
+			if (objinit) {
+				int rc = objinit(obj, context);
+				if (rc)
+					return rc;
+			}
+
+			/* add obj into the ring array */
+			ents[ie] = obj;
+			ages[ie] = os->tail;
+			os->tail++;
+			head->nr_objs++;
+		}
+	}
+
+	return 0;
+}
+
+/* cleanup all percpu slots of the object pool */
+static void objpool_fini_percpu_slots(struct objpool_head *head)
+{
+	int i;
+
+	if (!head->cpu_slots)
+		return;
+
+	for (i = 0; i < head->nr_cpus; i++) {
+		if (!head->cpu_slots[i])
+			continue;
+		if (head->flags & OBJPOOL_FROM_VMALLOC)
+			vfree(head->cpu_slots[i]);
+		else
+			kfree(head->cpu_slots[i]);
+	}
+	kfree(head->cpu_slots);
+	head->cpu_slots = NULL;
+	head->slot_sizes = NULL;
+}
+
+/* initialize object pool and pre-allocate objects */
+int objpool_init(struct objpool_head *head, int nr_objs, int object_size,
+		gfp_t gfp, void *context, objpool_init_obj_cb objinit,
+		objpool_fini_cb release)
+{
+	int nents, rc;
+
+	/* check input parameters */
+	if (nr_objs <= 0 || object_size <= 0)
+		return -EINVAL;
+
+	/* calculate percpu slot size (rounded to pow of 2) */
+	nents = max_t(int, roundup_pow_of_two(nr_objs),
+			objpool_nobjs(L1_CACHE_BYTES));
+
+	/* initialize objpool head */
+	memset(head, 0, sizeof(struct objpool_head));
+	head->nr_cpus = nr_cpu_ids;
+	head->obj_size = object_size;
+	head->capacity = nents;
+	head->gfp = gfp & ~__GFP_ZERO;
+	head->context = context;
+	head->release = release;
+
+	/* allocate array for percpu slots */
+	head->cpu_slots = kzalloc(head->nr_cpus * sizeof(void *) +
+			       head->nr_cpus * sizeof(int), head->gfp);
+	if (!head->cpu_slots)
+		return -ENOMEM;
+	head->slot_sizes = (int *)&head->cpu_slots[head->nr_cpus];
+
+	/* initialize per-cpu slots */
+	rc = objpool_init_percpu_slots(head, nr_objs, context, objinit);
+	if (rc)
+		objpool_fini_percpu_slots(head);
+	else
+		refcount_set(&head->ref, nr_objs + 1);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(objpool_init);
+
+/* adding object to slot, abort if the slot was already full */
+static inline int objpool_try_add_slot(void *obj, struct objpool_slot *os)
+{
+	uint32_t *ages = SLOT_AGES(os);
+	void **ents = SLOT_ENTS(os);
+	uint32_t head, tail;
+
+	do {
+		/* perform memory loading for both head and tail */
+		head = READ_ONCE(os->head);
+		tail = READ_ONCE(os->tail);
+		/* just abort if slot is full */
+		if (tail - head > os->mask)
+			return -ENOENT;
+		/* try to extend tail by 1 using CAS to avoid races */
+		if (try_cmpxchg_acquire(&os->tail, &tail, tail + 1))
+			break;
+	} while (1);
+
+	/* the tail-th of slot is reserved for the given obj */
+	WRITE_ONCE(ents[tail & os->mask], obj);
+	/* update epoch id to make this object available for pop() */
+	smp_store_release(&ages[tail & os->mask], tail);
+	return 0;
+}
+
+/* reclaim an object to object pool */
+int objpool_push(void *obj, struct objpool_head *oh)
+{
+	unsigned long flags;
+	int cpu, rc;
+
+	/* disable local irq to avoid preemption & interruption */
+	raw_local_irq_save(flags);
+	cpu = raw_smp_processor_id();
+	do {
+		rc = objpool_try_add_slot(obj, oh->cpu_slots[cpu]);
+		if (!rc)
+			break;
+		cpu = cpumask_next_wrap(cpu, cpu_possible_mask, -1, 1);
+	} while (1);
+	raw_local_irq_restore(flags);
+
+	return rc;
+}
+EXPORT_SYMBOL_GPL(objpool_push);
+
+/* drop the allocated object, rather reclaim it to objpool */
+int objpool_drop(void *obj, struct objpool_head *head)
+{
+	if (!obj || !head)
+		return -EINVAL;
+
+	if (refcount_dec_and_test(&head->ref)) {
+		objpool_free(head);
+		return 0;
+	}
+
+	return -EAGAIN;
+}
+EXPORT_SYMBOL_GPL(objpool_drop);
+
+/* try to retrieve object from slot */
+static inline void *objpool_try_get_slot(struct objpool_slot *os)
+{
+	uint32_t *ages = SLOT_AGES(os);
+	void **ents = SLOT_ENTS(os);
+	/* do memory load of head to local head */
+	uint32_t head = smp_load_acquire(&os->head);
+
+	/* loop if slot isn't empty */
+	while (head != READ_ONCE(os->tail)) {
+		uint32_t id = head & os->mask, prev = head;
+
+		/* do prefetching of object ents */
+		prefetch(&ents[id]);
+
+		/* check whether this item was ready for retrieval */
+		if (smp_load_acquire(&ages[id]) == head) {
+			/* node must have been udpated by push() */
+			void *node = READ_ONCE(ents[id]);
+			/* commit and move forward head of the slot */
+			if (try_cmpxchg_release(&os->head, &head, head + 1))
+				return node;
+			/* head was already updated by others */
+		}
+
+		/* re-load head from memory and continue trying */
+		head = READ_ONCE(os->head);
+		/*
+		 * head stays unchanged, so it's very likely there's an
+		 * ongoing push() on other cpu nodes but yet not update
+		 * ages[] to mark it's completion
+		 */
+		if (head == prev)
+			break;
+	}
+
+	return NULL;
+}
+
+/* allocate an object from object pool */
+void *objpool_pop(struct objpool_head *head)
+{
+	unsigned long flags;
+	int i, cpu;
+	void *obj = NULL;
+
+	/* disable local irq to avoid preemption & interruption */
+	raw_local_irq_save(flags);
+
+	cpu = raw_smp_processor_id();
+	for (i = 0; i < num_possible_cpus(); i++) {
+		obj = objpool_try_get_slot(head->cpu_slots[cpu]);
+		if (obj)
+			break;
+		cpu = cpumask_next_wrap(cpu, cpu_possible_mask, -1, 1);
+	}
+	raw_local_irq_restore(flags);
+
+	return obj;
+}
+EXPORT_SYMBOL_GPL(objpool_pop);
+
+/* release whole objpool forcely */
+void objpool_free(struct objpool_head *head)
+{
+	if (!head->cpu_slots)
+		return;
+
+	/* release percpu slots */
+	objpool_fini_percpu_slots(head);
+
+	/* call user's cleanup callback if provided */
+	if (head->release)
+		head->release(head, head->context);
+}
+EXPORT_SYMBOL_GPL(objpool_free);
+
+/* drop unused objects and defref objpool for releasing */
+void objpool_fini(struct objpool_head *head)
+{
+	void *nod;
+
+	do {
+		/* grab object from objpool and drop it */
+		nod = objpool_pop(head);
+
+		/* drop the extra ref of objpool */
+		if (refcount_dec_and_test(&head->ref))
+			objpool_free(head);
+	} while (nod);
+}
+EXPORT_SYMBOL_GPL(objpool_fini);
