diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 8d41fdd40657e..f58e1d8e2ca31 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -58,8 +58,6 @@ source "drivers/staging/nvec/Kconfig"
 
 source "drivers/staging/media/Kconfig"
 
-source "drivers/staging/android/Kconfig"
-
 source "drivers/staging/board/Kconfig"
 
 source "drivers/staging/gdm724x/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 02b01949b94eb..5353520ff0f4e 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -19,7 +19,6 @@ obj-$(CONFIG_IIO)		+= iio/
 obj-$(CONFIG_FB_SM750)		+= sm750fb/
 obj-$(CONFIG_USB_EMXX)		+= emxx_udc/
 obj-$(CONFIG_MFD_NVEC)		+= nvec/
-obj-$(CONFIG_ANDROID)		+= android/
 obj-$(CONFIG_STAGING_BOARD)	+= board/
 obj-$(CONFIG_LTE_GDM724X)	+= gdm724x/
 obj-$(CONFIG_FIREWIRE_SERIAL)	+= fwserial/
diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig
deleted file mode 100644
index 70498adb15759..0000000000000
--- a/drivers/staging/android/Kconfig
+++ /dev/null
@@ -1,19 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-menu "Android"
-
-if ANDROID
-
-config ASHMEM
-	bool "Enable the Anonymous Shared Memory Subsystem"
-	depends on SHMEM
-	help
-	  The ashmem subsystem is a new shared memory allocator, similar to
-	  POSIX SHM but with different behavior and sporting a simpler
-	  file-based API.
-
-	  It is, in theory, a good memory allocator for low-memory devices,
-	  because it can discard shared memory units when under memory pressure.
-
-endif # if ANDROID
-
-endmenu
diff --git a/drivers/staging/android/Makefile b/drivers/staging/android/Makefile
deleted file mode 100644
index e9a55a5e65291..0000000000000
--- a/drivers/staging/android/Makefile
+++ /dev/null
@@ -1,4 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-ccflags-y += -I$(src)			# needed for trace events
-
-obj-$(CONFIG_ASHMEM)			+= ashmem.o
diff --git a/drivers/staging/android/TODO b/drivers/staging/android/TODO
deleted file mode 100644
index f74eb44d8e458..0000000000000
--- a/drivers/staging/android/TODO
+++ /dev/null
@@ -1,8 +0,0 @@
-TODO:
-	- sparse fixes
-	- rename files to be not so "generic"
-	- add proper arch dependencies as needed
-	- audit userspace interfaces to make sure they are sane
-
-Please send patches to Greg Kroah-Hartman <greg@kroah.com> and Cc:
-Arve Hjønnevåg <arve@android.com> and Riley Andrews <riandrews@android.com>
diff --git a/drivers/staging/android/ashmem.c b/drivers/staging/android/ashmem.c
deleted file mode 100644
index ddbde3f8430e9..0000000000000
--- a/drivers/staging/android/ashmem.c
+++ /dev/null
@@ -1,970 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* mm/ashmem.c
- *
- * Anonymous Shared Memory Subsystem, ashmem
- *
- * Copyright (C) 2008 Google, Inc.
- *
- * Robert Love <rlove@google.com>
- */
-
-#define pr_fmt(fmt) "ashmem: " fmt
-
-#include <linux/init.h>
-#include <linux/export.h>
-#include <linux/file.h>
-#include <linux/fs.h>
-#include <linux/falloc.h>
-#include <linux/miscdevice.h>
-#include <linux/security.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/uaccess.h>
-#include <linux/personality.h>
-#include <linux/bitops.h>
-#include <linux/mutex.h>
-#include <linux/shmem_fs.h>
-#include "ashmem.h"
-
-#define ASHMEM_NAME_PREFIX "dev/ashmem/"
-#define ASHMEM_NAME_PREFIX_LEN (sizeof(ASHMEM_NAME_PREFIX) - 1)
-#define ASHMEM_FULL_NAME_LEN (ASHMEM_NAME_LEN + ASHMEM_NAME_PREFIX_LEN)
-
-/**
- * struct ashmem_area - The anonymous shared memory area
- * @name:		The optional name in /proc/pid/maps
- * @unpinned_list:	The list of all ashmem areas
- * @file:		The shmem-based backing file
- * @size:		The size of the mapping, in bytes
- * @prot_mask:		The allowed protection bits, as vm_flags
- *
- * The lifecycle of this structure is from our parent file's open() until
- * its release(). It is also protected by 'ashmem_mutex'
- *
- * Warning: Mappings do NOT pin this structure; It dies on close()
- */
-struct ashmem_area {
-	char name[ASHMEM_FULL_NAME_LEN];
-	struct list_head unpinned_list;
-	struct file *file;
-	size_t size;
-	unsigned long prot_mask;
-};
-
-/**
- * struct ashmem_range - A range of unpinned/evictable pages
- * @lru:	         The entry in the LRU list
- * @unpinned:	         The entry in its area's unpinned list
- * @asma:	         The associated anonymous shared memory area.
- * @pgstart:	         The starting page (inclusive)
- * @pgend:	         The ending page (inclusive)
- * @purged:	         The purge status (ASHMEM_NOT or ASHMEM_WAS_PURGED)
- *
- * The lifecycle of this structure is from unpin to pin.
- * It is protected by 'ashmem_mutex'
- */
-struct ashmem_range {
-	struct list_head lru;
-	struct list_head unpinned;
-	struct ashmem_area *asma;
-	size_t pgstart;
-	size_t pgend;
-	unsigned int purged;
-};
-
-/* LRU list of unpinned pages, protected by ashmem_mutex */
-static LIST_HEAD(ashmem_lru_list);
-
-static atomic_t ashmem_shrink_inflight = ATOMIC_INIT(0);
-static DECLARE_WAIT_QUEUE_HEAD(ashmem_shrink_wait);
-
-/*
- * long lru_count - The count of pages on our LRU list.
- *
- * This is protected by ashmem_mutex.
- */
-static unsigned long lru_count;
-
-/*
- * ashmem_mutex - protects the list of and each individual ashmem_area
- *
- * Lock Ordering: ashmex_mutex -> i_mutex -> i_alloc_sem
- */
-static DEFINE_MUTEX(ashmem_mutex);
-
-static struct kmem_cache *ashmem_area_cachep __read_mostly;
-static struct kmem_cache *ashmem_range_cachep __read_mostly;
-
-/*
- * A separate lockdep class for the backing shmem inodes to resolve the lockdep
- * warning about the race between kswapd taking fs_reclaim before inode_lock
- * and write syscall taking inode_lock and then fs_reclaim.
- * Note that such race is impossible because ashmem does not support write
- * syscalls operating on the backing shmem.
- */
-static struct lock_class_key backing_shmem_inode_class;
-
-static inline unsigned long range_size(struct ashmem_range *range)
-{
-	return range->pgend - range->pgstart + 1;
-}
-
-static inline bool range_on_lru(struct ashmem_range *range)
-{
-	return range->purged == ASHMEM_NOT_PURGED;
-}
-
-static inline bool page_range_subsumes_range(struct ashmem_range *range,
-					     size_t start, size_t end)
-{
-	return (range->pgstart >= start) && (range->pgend <= end);
-}
-
-static inline bool page_range_subsumed_by_range(struct ashmem_range *range,
-						size_t start, size_t end)
-{
-	return (range->pgstart <= start) && (range->pgend >= end);
-}
-
-static inline bool page_in_range(struct ashmem_range *range, size_t page)
-{
-	return (range->pgstart <= page) && (range->pgend >= page);
-}
-
-static inline bool page_range_in_range(struct ashmem_range *range,
-				       size_t start, size_t end)
-{
-	return page_in_range(range, start) || page_in_range(range, end) ||
-		page_range_subsumes_range(range, start, end);
-}
-
-static inline bool range_before_page(struct ashmem_range *range,
-				     size_t page)
-{
-	return range->pgend < page;
-}
-
-#define PROT_MASK		(PROT_EXEC | PROT_READ | PROT_WRITE)
-
-/**
- * lru_add() - Adds a range of memory to the LRU list
- * @range:     The memory range being added.
- *
- * The range is first added to the end (tail) of the LRU list.
- * After this, the size of the range is added to @lru_count
- */
-static inline void lru_add(struct ashmem_range *range)
-{
-	list_add_tail(&range->lru, &ashmem_lru_list);
-	lru_count += range_size(range);
-}
-
-/**
- * lru_del() - Removes a range of memory from the LRU list
- * @range:     The memory range being removed
- *
- * The range is first deleted from the LRU list.
- * After this, the size of the range is removed from @lru_count
- */
-static inline void lru_del(struct ashmem_range *range)
-{
-	list_del(&range->lru);
-	lru_count -= range_size(range);
-}
-
-/**
- * range_alloc() - Allocates and initializes a new ashmem_range structure
- * @asma:	   The associated ashmem_area
- * @prev_range:	   The previous ashmem_range in the sorted asma->unpinned list
- * @purged:	   Initial purge status (ASMEM_NOT_PURGED or ASHMEM_WAS_PURGED)
- * @start:	   The starting page (inclusive)
- * @end:	   The ending page (inclusive)
- * @new_range:	   The placeholder for the new range
- *
- * This function is protected by ashmem_mutex.
- */
-static void range_alloc(struct ashmem_area *asma,
-			struct ashmem_range *prev_range, unsigned int purged,
-			size_t start, size_t end,
-			struct ashmem_range **new_range)
-{
-	struct ashmem_range *range = *new_range;
-
-	*new_range = NULL;
-	range->asma = asma;
-	range->pgstart = start;
-	range->pgend = end;
-	range->purged = purged;
-
-	list_add_tail(&range->unpinned, &prev_range->unpinned);
-
-	if (range_on_lru(range))
-		lru_add(range);
-}
-
-/**
- * range_del() - Deletes and deallocates an ashmem_range structure
- * @range:	 The associated ashmem_range that has previously been allocated
- */
-static void range_del(struct ashmem_range *range)
-{
-	list_del(&range->unpinned);
-	if (range_on_lru(range))
-		lru_del(range);
-	kmem_cache_free(ashmem_range_cachep, range);
-}
-
-/**
- * range_shrink() - Shrinks an ashmem_range
- * @range:	    The associated ashmem_range being shrunk
- * @start:	    The starting byte of the new range
- * @end:	    The ending byte of the new range
- *
- * This does not modify the data inside the existing range in any way - It
- * simply shrinks the boundaries of the range.
- *
- * Theoretically, with a little tweaking, this could eventually be changed
- * to range_resize, and expand the lru_count if the new range is larger.
- */
-static inline void range_shrink(struct ashmem_range *range,
-				size_t start, size_t end)
-{
-	size_t pre = range_size(range);
-
-	range->pgstart = start;
-	range->pgend = end;
-
-	if (range_on_lru(range))
-		lru_count -= pre - range_size(range);
-}
-
-/**
- * ashmem_open() - Opens an Anonymous Shared Memory structure
- * @inode:	   The backing file's index node(?)
- * @file:	   The backing file
- *
- * Please note that the ashmem_area is not returned by this function - It is
- * instead written to "file->private_data".
- *
- * Return: 0 if successful, or another code if unsuccessful.
- */
-static int ashmem_open(struct inode *inode, struct file *file)
-{
-	struct ashmem_area *asma;
-	int ret;
-
-	ret = generic_file_open(inode, file);
-	if (ret)
-		return ret;
-
-	asma = kmem_cache_zalloc(ashmem_area_cachep, GFP_KERNEL);
-	if (!asma)
-		return -ENOMEM;
-
-	INIT_LIST_HEAD(&asma->unpinned_list);
-	memcpy(asma->name, ASHMEM_NAME_PREFIX, ASHMEM_NAME_PREFIX_LEN);
-	asma->prot_mask = PROT_MASK;
-	file->private_data = asma;
-
-	return 0;
-}
-
-/**
- * ashmem_release() - Releases an Anonymous Shared Memory structure
- * @ignored:	      The backing file's Index Node(?) - It is ignored here.
- * @file:	      The backing file
- *
- * Return: 0 if successful. If it is anything else, go have a coffee and
- * try again.
- */
-static int ashmem_release(struct inode *ignored, struct file *file)
-{
-	struct ashmem_area *asma = file->private_data;
-	struct ashmem_range *range, *next;
-
-	mutex_lock(&ashmem_mutex);
-	list_for_each_entry_safe(range, next, &asma->unpinned_list, unpinned)
-		range_del(range);
-	mutex_unlock(&ashmem_mutex);
-
-	if (asma->file)
-		fput(asma->file);
-	kmem_cache_free(ashmem_area_cachep, asma);
-
-	return 0;
-}
-
-static ssize_t ashmem_read_iter(struct kiocb *iocb, struct iov_iter *iter)
-{
-	struct ashmem_area *asma = iocb->ki_filp->private_data;
-	int ret = 0;
-
-	mutex_lock(&ashmem_mutex);
-
-	/* If size is not set, or set to 0, always return EOF. */
-	if (asma->size == 0)
-		goto out_unlock;
-
-	if (!asma->file) {
-		ret = -EBADF;
-		goto out_unlock;
-	}
-
-	/*
-	 * asma and asma->file are used outside the lock here.  We assume
-	 * once asma->file is set it will never be changed, and will not
-	 * be destroyed until all references to the file are dropped and
-	 * ashmem_release is called.
-	 */
-	mutex_unlock(&ashmem_mutex);
-	ret = vfs_iter_read(asma->file, iter, &iocb->ki_pos, 0);
-	mutex_lock(&ashmem_mutex);
-	if (ret > 0)
-		asma->file->f_pos = iocb->ki_pos;
-out_unlock:
-	mutex_unlock(&ashmem_mutex);
-	return ret;
-}
-
-static loff_t ashmem_llseek(struct file *file, loff_t offset, int origin)
-{
-	struct ashmem_area *asma = file->private_data;
-	loff_t ret;
-
-	mutex_lock(&ashmem_mutex);
-
-	if (asma->size == 0) {
-		mutex_unlock(&ashmem_mutex);
-		return -EINVAL;
-	}
-
-	if (!asma->file) {
-		mutex_unlock(&ashmem_mutex);
-		return -EBADF;
-	}
-
-	mutex_unlock(&ashmem_mutex);
-
-	ret = vfs_llseek(asma->file, offset, origin);
-	if (ret < 0)
-		return ret;
-
-	/** Copy f_pos from backing file, since f_ops->llseek() sets it */
-	file->f_pos = asma->file->f_pos;
-	return ret;
-}
-
-static inline vm_flags_t calc_vm_may_flags(unsigned long prot)
-{
-	return _calc_vm_trans(prot, PROT_READ,  VM_MAYREAD) |
-	       _calc_vm_trans(prot, PROT_WRITE, VM_MAYWRITE) |
-	       _calc_vm_trans(prot, PROT_EXEC,  VM_MAYEXEC);
-}
-
-static int ashmem_vmfile_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	/* do not allow to mmap ashmem backing shmem file directly */
-	return -EPERM;
-}
-
-static unsigned long
-ashmem_vmfile_get_unmapped_area(struct file *file, unsigned long addr,
-				unsigned long len, unsigned long pgoff,
-				unsigned long flags)
-{
-	return current->mm->get_unmapped_area(file, addr, len, pgoff, flags);
-}
-
-static int ashmem_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	static struct file_operations vmfile_fops;
-	struct ashmem_area *asma = file->private_data;
-	int ret = 0;
-
-	mutex_lock(&ashmem_mutex);
-
-	/* user needs to SET_SIZE before mapping */
-	if (!asma->size) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* requested mapping size larger than object size */
-	if (vma->vm_end - vma->vm_start > PAGE_ALIGN(asma->size)) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* requested protection bits must match our allowed protection mask */
-	if ((vma->vm_flags & ~calc_vm_prot_bits(asma->prot_mask, 0)) &
-	    calc_vm_prot_bits(PROT_MASK, 0)) {
-		ret = -EPERM;
-		goto out;
-	}
-	vma->vm_flags &= ~calc_vm_may_flags(~asma->prot_mask);
-
-	if (!asma->file) {
-		char *name = ASHMEM_NAME_DEF;
-		struct file *vmfile;
-		struct inode *inode;
-
-		if (asma->name[ASHMEM_NAME_PREFIX_LEN] != '\0')
-			name = asma->name;
-
-		/* ... and allocate the backing shmem file */
-		vmfile = shmem_file_setup(name, asma->size, vma->vm_flags);
-		if (IS_ERR(vmfile)) {
-			ret = PTR_ERR(vmfile);
-			goto out;
-		}
-		vmfile->f_mode |= FMODE_LSEEK;
-		inode = file_inode(vmfile);
-		lockdep_set_class(&inode->i_rwsem, &backing_shmem_inode_class);
-		asma->file = vmfile;
-		/*
-		 * override mmap operation of the vmfile so that it can't be
-		 * remapped which would lead to creation of a new vma with no
-		 * asma permission checks. Have to override get_unmapped_area
-		 * as well to prevent VM_BUG_ON check for f_ops modification.
-		 */
-		if (!vmfile_fops.mmap) {
-			vmfile_fops = *vmfile->f_op;
-			vmfile_fops.mmap = ashmem_vmfile_mmap;
-			vmfile_fops.get_unmapped_area =
-					ashmem_vmfile_get_unmapped_area;
-		}
-		vmfile->f_op = &vmfile_fops;
-	}
-	get_file(asma->file);
-
-	/*
-	 * XXX - Reworked to use shmem_zero_setup() instead of
-	 * shmem_set_file while we're in staging. -jstultz
-	 */
-	if (vma->vm_flags & VM_SHARED) {
-		ret = shmem_zero_setup(vma);
-		if (ret) {
-			fput(asma->file);
-			goto out;
-		}
-	} else {
-		vma_set_anonymous(vma);
-	}
-
-	vma_set_file(vma, asma->file);
-	/* XXX: merge this with the get_file() above if possible */
-	fput(asma->file);
-
-out:
-	mutex_unlock(&ashmem_mutex);
-	return ret;
-}
-
-/*
- * ashmem_shrink - our cache shrinker, called from mm/vmscan.c
- *
- * 'nr_to_scan' is the number of objects to scan for freeing.
- *
- * 'gfp_mask' is the mask of the allocation that got us into this mess.
- *
- * Return value is the number of objects freed or -1 if we cannot
- * proceed without risk of deadlock (due to gfp_mask).
- *
- * We approximate LRU via least-recently-unpinned, jettisoning unpinned partial
- * chunks of ashmem regions LRU-wise one-at-a-time until we hit 'nr_to_scan'
- * pages freed.
- */
-static unsigned long
-ashmem_shrink_scan(struct shrinker *shrink, struct shrink_control *sc)
-{
-	unsigned long freed = 0;
-
-	/* We might recurse into filesystem code, so bail out if necessary */
-	if (!(sc->gfp_mask & __GFP_FS))
-		return SHRINK_STOP;
-
-	if (!mutex_trylock(&ashmem_mutex))
-		return -1;
-
-	while (!list_empty(&ashmem_lru_list)) {
-		struct ashmem_range *range =
-			list_first_entry(&ashmem_lru_list, typeof(*range), lru);
-		loff_t start = range->pgstart * PAGE_SIZE;
-		loff_t end = (range->pgend + 1) * PAGE_SIZE;
-		struct file *f = range->asma->file;
-
-		get_file(f);
-		atomic_inc(&ashmem_shrink_inflight);
-		range->purged = ASHMEM_WAS_PURGED;
-		lru_del(range);
-
-		freed += range_size(range);
-		mutex_unlock(&ashmem_mutex);
-		f->f_op->fallocate(f,
-				   FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
-				   start, end - start);
-		fput(f);
-		if (atomic_dec_and_test(&ashmem_shrink_inflight))
-			wake_up_all(&ashmem_shrink_wait);
-		if (!mutex_trylock(&ashmem_mutex))
-			goto out;
-		if (--sc->nr_to_scan <= 0)
-			break;
-	}
-	mutex_unlock(&ashmem_mutex);
-out:
-	return freed;
-}
-
-static unsigned long
-ashmem_shrink_count(struct shrinker *shrink, struct shrink_control *sc)
-{
-	/*
-	 * note that lru_count is count of pages on the lru, not a count of
-	 * objects on the list. This means the scan function needs to return the
-	 * number of pages freed, not the number of objects scanned.
-	 */
-	return lru_count;
-}
-
-static struct shrinker ashmem_shrinker = {
-	.count_objects = ashmem_shrink_count,
-	.scan_objects = ashmem_shrink_scan,
-	/*
-	 * XXX (dchinner): I wish people would comment on why they need on
-	 * significant changes to the default value here
-	 */
-	.seeks = DEFAULT_SEEKS * 4,
-};
-
-static int set_prot_mask(struct ashmem_area *asma, unsigned long prot)
-{
-	int ret = 0;
-
-	mutex_lock(&ashmem_mutex);
-
-	/* the user can only remove, not add, protection bits */
-	if ((asma->prot_mask & prot) != prot) {
-		ret = -EINVAL;
-		goto out;
-	}
-
-	/* does the application expect PROT_READ to imply PROT_EXEC? */
-	if ((prot & PROT_READ) && (current->personality & READ_IMPLIES_EXEC))
-		prot |= PROT_EXEC;
-
-	asma->prot_mask = prot;
-
-out:
-	mutex_unlock(&ashmem_mutex);
-	return ret;
-}
-
-static int set_name(struct ashmem_area *asma, void __user *name)
-{
-	int len;
-	int ret = 0;
-	char local_name[ASHMEM_NAME_LEN];
-
-	/*
-	 * Holding the ashmem_mutex while doing a copy_from_user might cause
-	 * an data abort which would try to access mmap_lock. If another
-	 * thread has invoked ashmem_mmap then it will be holding the
-	 * semaphore and will be waiting for ashmem_mutex, there by leading to
-	 * deadlock. We'll release the mutex and take the name to a local
-	 * variable that does not need protection and later copy the local
-	 * variable to the structure member with lock held.
-	 */
-	len = strncpy_from_user(local_name, name, ASHMEM_NAME_LEN);
-	if (len < 0)
-		return len;
-
-	mutex_lock(&ashmem_mutex);
-	/* cannot change an existing mapping's name */
-	if (asma->file)
-		ret = -EINVAL;
-	else
-		strscpy(asma->name + ASHMEM_NAME_PREFIX_LEN, local_name,
-			ASHMEM_NAME_LEN);
-
-	mutex_unlock(&ashmem_mutex);
-	return ret;
-}
-
-static int get_name(struct ashmem_area *asma, void __user *name)
-{
-	int ret = 0;
-	size_t len;
-	/*
-	 * Have a local variable to which we'll copy the content
-	 * from asma with the lock held. Later we can copy this to the user
-	 * space safely without holding any locks. So even if we proceed to
-	 * wait for mmap_lock, it won't lead to deadlock.
-	 */
-	char local_name[ASHMEM_NAME_LEN];
-
-	mutex_lock(&ashmem_mutex);
-	if (asma->name[ASHMEM_NAME_PREFIX_LEN] != '\0') {
-		/*
-		 * Copying only `len', instead of ASHMEM_NAME_LEN, bytes
-		 * prevents us from revealing one user's stack to another.
-		 */
-		len = strlen(asma->name + ASHMEM_NAME_PREFIX_LEN) + 1;
-		memcpy(local_name, asma->name + ASHMEM_NAME_PREFIX_LEN, len);
-	} else {
-		len = sizeof(ASHMEM_NAME_DEF);
-		memcpy(local_name, ASHMEM_NAME_DEF, len);
-	}
-	mutex_unlock(&ashmem_mutex);
-
-	/*
-	 * Now we are just copying from the stack variable to userland
-	 * No lock held
-	 */
-	if (copy_to_user(name, local_name, len))
-		ret = -EFAULT;
-	return ret;
-}
-
-/*
- * ashmem_pin - pin the given ashmem region, returning whether it was
- * previously purged (ASHMEM_WAS_PURGED) or not (ASHMEM_NOT_PURGED).
- *
- * Caller must hold ashmem_mutex.
- */
-static int ashmem_pin(struct ashmem_area *asma, size_t pgstart, size_t pgend,
-		      struct ashmem_range **new_range)
-{
-	struct ashmem_range *range, *next;
-	int ret = ASHMEM_NOT_PURGED;
-
-	list_for_each_entry_safe(range, next, &asma->unpinned_list, unpinned) {
-		/* moved past last applicable page; we can short circuit */
-		if (range_before_page(range, pgstart))
-			break;
-
-		/*
-		 * The user can ask us to pin pages that span multiple ranges,
-		 * or to pin pages that aren't even unpinned, so this is messy.
-		 *
-		 * Four cases:
-		 * 1. The requested range subsumes an existing range, so we
-		 *    just remove the entire matching range.
-		 * 2. The requested range overlaps the start of an existing
-		 *    range, so we just update that range.
-		 * 3. The requested range overlaps the end of an existing
-		 *    range, so we just update that range.
-		 * 4. The requested range punches a hole in an existing range,
-		 *    so we have to update one side of the range and then
-		 *    create a new range for the other side.
-		 */
-		if (page_range_in_range(range, pgstart, pgend)) {
-			ret |= range->purged;
-
-			/* Case #1: Easy. Just nuke the whole thing. */
-			if (page_range_subsumes_range(range, pgstart, pgend)) {
-				range_del(range);
-				continue;
-			}
-
-			/* Case #2: We overlap from the start, so adjust it */
-			if (range->pgstart >= pgstart) {
-				range_shrink(range, pgend + 1, range->pgend);
-				continue;
-			}
-
-			/* Case #3: We overlap from the rear, so adjust it */
-			if (range->pgend <= pgend) {
-				range_shrink(range, range->pgstart,
-					     pgstart - 1);
-				continue;
-			}
-
-			/*
-			 * Case #4: We eat a chunk out of the middle. A bit
-			 * more complicated, we allocate a new range for the
-			 * second half and adjust the first chunk's endpoint.
-			 */
-			range_alloc(asma, range, range->purged,
-				    pgend + 1, range->pgend, new_range);
-			range_shrink(range, range->pgstart, pgstart - 1);
-			break;
-		}
-	}
-
-	return ret;
-}
-
-/*
- * ashmem_unpin - unpin the given range of pages. Returns zero on success.
- *
- * Caller must hold ashmem_mutex.
- */
-static int ashmem_unpin(struct ashmem_area *asma, size_t pgstart, size_t pgend,
-			struct ashmem_range **new_range)
-{
-	struct ashmem_range *range, *next;
-	unsigned int purged = ASHMEM_NOT_PURGED;
-
-restart:
-	list_for_each_entry_safe(range, next, &asma->unpinned_list, unpinned) {
-		/* short circuit: this is our insertion point */
-		if (range_before_page(range, pgstart))
-			break;
-
-		/*
-		 * The user can ask us to unpin pages that are already entirely
-		 * or partially pinned. We handle those two cases here.
-		 */
-		if (page_range_subsumed_by_range(range, pgstart, pgend))
-			return 0;
-		if (page_range_in_range(range, pgstart, pgend)) {
-			pgstart = min(range->pgstart, pgstart);
-			pgend = max(range->pgend, pgend);
-			purged |= range->purged;
-			range_del(range);
-			goto restart;
-		}
-	}
-
-	range_alloc(asma, range, purged, pgstart, pgend, new_range);
-	return 0;
-}
-
-/*
- * ashmem_get_pin_status - Returns ASHMEM_IS_UNPINNED if _any_ pages in the
- * given interval are unpinned and ASHMEM_IS_PINNED otherwise.
- *
- * Caller must hold ashmem_mutex.
- */
-static int ashmem_get_pin_status(struct ashmem_area *asma, size_t pgstart,
-				 size_t pgend)
-{
-	struct ashmem_range *range;
-	int ret = ASHMEM_IS_PINNED;
-
-	list_for_each_entry(range, &asma->unpinned_list, unpinned) {
-		if (range_before_page(range, pgstart))
-			break;
-		if (page_range_in_range(range, pgstart, pgend)) {
-			ret = ASHMEM_IS_UNPINNED;
-			break;
-		}
-	}
-
-	return ret;
-}
-
-static int ashmem_pin_unpin(struct ashmem_area *asma, unsigned long cmd,
-			    void __user *p)
-{
-	struct ashmem_pin pin;
-	size_t pgstart, pgend;
-	int ret = -EINVAL;
-	struct ashmem_range *range = NULL;
-
-	if (copy_from_user(&pin, p, sizeof(pin)))
-		return -EFAULT;
-
-	if (cmd == ASHMEM_PIN || cmd == ASHMEM_UNPIN) {
-		range = kmem_cache_zalloc(ashmem_range_cachep, GFP_KERNEL);
-		if (!range)
-			return -ENOMEM;
-	}
-
-	mutex_lock(&ashmem_mutex);
-	wait_event(ashmem_shrink_wait, !atomic_read(&ashmem_shrink_inflight));
-
-	if (!asma->file)
-		goto out_unlock;
-
-	/* per custom, you can pass zero for len to mean "everything onward" */
-	if (!pin.len)
-		pin.len = PAGE_ALIGN(asma->size) - pin.offset;
-
-	if ((pin.offset | pin.len) & ~PAGE_MASK)
-		goto out_unlock;
-
-	if (((__u32)-1) - pin.offset < pin.len)
-		goto out_unlock;
-
-	if (PAGE_ALIGN(asma->size) < pin.offset + pin.len)
-		goto out_unlock;
-
-	pgstart = pin.offset / PAGE_SIZE;
-	pgend = pgstart + (pin.len / PAGE_SIZE) - 1;
-
-	switch (cmd) {
-	case ASHMEM_PIN:
-		ret = ashmem_pin(asma, pgstart, pgend, &range);
-		break;
-	case ASHMEM_UNPIN:
-		ret = ashmem_unpin(asma, pgstart, pgend, &range);
-		break;
-	case ASHMEM_GET_PIN_STATUS:
-		ret = ashmem_get_pin_status(asma, pgstart, pgend);
-		break;
-	}
-
-out_unlock:
-	mutex_unlock(&ashmem_mutex);
-	if (range)
-		kmem_cache_free(ashmem_range_cachep, range);
-
-	return ret;
-}
-
-static long ashmem_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
-{
-	struct ashmem_area *asma = file->private_data;
-	long ret = -ENOTTY;
-
-	switch (cmd) {
-	case ASHMEM_SET_NAME:
-		ret = set_name(asma, (void __user *)arg);
-		break;
-	case ASHMEM_GET_NAME:
-		ret = get_name(asma, (void __user *)arg);
-		break;
-	case ASHMEM_SET_SIZE:
-		ret = -EINVAL;
-		mutex_lock(&ashmem_mutex);
-		if (!asma->file) {
-			ret = 0;
-			asma->size = (size_t)arg;
-		}
-		mutex_unlock(&ashmem_mutex);
-		break;
-	case ASHMEM_GET_SIZE:
-		ret = asma->size;
-		break;
-	case ASHMEM_SET_PROT_MASK:
-		ret = set_prot_mask(asma, arg);
-		break;
-	case ASHMEM_GET_PROT_MASK:
-		ret = asma->prot_mask;
-		break;
-	case ASHMEM_PIN:
-	case ASHMEM_UNPIN:
-	case ASHMEM_GET_PIN_STATUS:
-		ret = ashmem_pin_unpin(asma, cmd, (void __user *)arg);
-		break;
-	case ASHMEM_PURGE_ALL_CACHES:
-		ret = -EPERM;
-		if (capable(CAP_SYS_ADMIN)) {
-			struct shrink_control sc = {
-				.gfp_mask = GFP_KERNEL,
-				.nr_to_scan = LONG_MAX,
-			};
-			ret = ashmem_shrink_count(&ashmem_shrinker, &sc);
-			ashmem_shrink_scan(&ashmem_shrinker, &sc);
-		}
-		break;
-	}
-
-	return ret;
-}
-
-/* support of 32bit userspace on 64bit platforms */
-#ifdef CONFIG_COMPAT
-static long compat_ashmem_ioctl(struct file *file, unsigned int cmd,
-				unsigned long arg)
-{
-	switch (cmd) {
-	case COMPAT_ASHMEM_SET_SIZE:
-		cmd = ASHMEM_SET_SIZE;
-		break;
-	case COMPAT_ASHMEM_SET_PROT_MASK:
-		cmd = ASHMEM_SET_PROT_MASK;
-		break;
-	}
-	return ashmem_ioctl(file, cmd, arg);
-}
-#endif
-#ifdef CONFIG_PROC_FS
-static void ashmem_show_fdinfo(struct seq_file *m, struct file *file)
-{
-	struct ashmem_area *asma = file->private_data;
-
-	mutex_lock(&ashmem_mutex);
-
-	if (asma->file)
-		seq_printf(m, "inode:\t%ld\n", file_inode(asma->file)->i_ino);
-
-	if (asma->name[ASHMEM_NAME_PREFIX_LEN] != '\0')
-		seq_printf(m, "name:\t%s\n",
-			   asma->name + ASHMEM_NAME_PREFIX_LEN);
-
-	seq_printf(m, "size:\t%zu\n", asma->size);
-
-	mutex_unlock(&ashmem_mutex);
-}
-#endif
-static const struct file_operations ashmem_fops = {
-	.owner = THIS_MODULE,
-	.open = ashmem_open,
-	.release = ashmem_release,
-	.read_iter = ashmem_read_iter,
-	.llseek = ashmem_llseek,
-	.mmap = ashmem_mmap,
-	.unlocked_ioctl = ashmem_ioctl,
-#ifdef CONFIG_COMPAT
-	.compat_ioctl = compat_ashmem_ioctl,
-#endif
-#ifdef CONFIG_PROC_FS
-	.show_fdinfo = ashmem_show_fdinfo,
-#endif
-};
-
-static struct miscdevice ashmem_misc = {
-	.minor = MISC_DYNAMIC_MINOR,
-	.name = "ashmem",
-	.fops = &ashmem_fops,
-};
-
-static int __init ashmem_init(void)
-{
-	int ret = -ENOMEM;
-
-	ashmem_area_cachep = kmem_cache_create("ashmem_area_cache",
-					       sizeof(struct ashmem_area),
-					       0, 0, NULL);
-	if (!ashmem_area_cachep) {
-		pr_err("failed to create slab cache\n");
-		goto out;
-	}
-
-	ashmem_range_cachep = kmem_cache_create("ashmem_range_cache",
-						sizeof(struct ashmem_range),
-						0, SLAB_RECLAIM_ACCOUNT, NULL);
-	if (!ashmem_range_cachep) {
-		pr_err("failed to create slab cache\n");
-		goto out_free1;
-	}
-
-	ret = misc_register(&ashmem_misc);
-	if (ret) {
-		pr_err("failed to register misc device!\n");
-		goto out_free2;
-	}
-
-	ret = register_shrinker(&ashmem_shrinker);
-	if (ret) {
-		pr_err("failed to register shrinker!\n");
-		goto out_demisc;
-	}
-
-	pr_info("initialized\n");
-
-	return 0;
-
-out_demisc:
-	misc_deregister(&ashmem_misc);
-out_free2:
-	kmem_cache_destroy(ashmem_range_cachep);
-out_free1:
-	kmem_cache_destroy(ashmem_area_cachep);
-out:
-	return ret;
-}
-device_initcall(ashmem_init);
diff --git a/drivers/staging/android/ashmem.h b/drivers/staging/android/ashmem.h
deleted file mode 100644
index 1a478173cd214..0000000000000
--- a/drivers/staging/android/ashmem.h
+++ /dev/null
@@ -1,24 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR Apache-2.0 */
-/*
- * include/linux/ashmem.h
- *
- * Copyright 2008 Google Inc.
- * Author: Robert Love
- */
-
-#ifndef _LINUX_ASHMEM_H
-#define _LINUX_ASHMEM_H
-
-#include <linux/limits.h>
-#include <linux/ioctl.h>
-#include <linux/compat.h>
-
-#include "uapi/ashmem.h"
-
-/* support of 32bit userspace on 64bit platforms */
-#ifdef CONFIG_COMPAT
-#define COMPAT_ASHMEM_SET_SIZE		_IOW(__ASHMEMIOC, 3, compat_size_t)
-#define COMPAT_ASHMEM_SET_PROT_MASK	_IOW(__ASHMEMIOC, 5, unsigned int)
-#endif
-
-#endif	/* _LINUX_ASHMEM_H */
diff --git a/drivers/staging/android/uapi/ashmem.h b/drivers/staging/android/uapi/ashmem.h
deleted file mode 100644
index 134efacb32190..0000000000000
--- a/drivers/staging/android/uapi/ashmem.h
+++ /dev/null
@@ -1,43 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR Apache-2.0 */
-/*
- * Copyright 2008 Google Inc.
- * Author: Robert Love
- */
-
-#ifndef _UAPI_LINUX_ASHMEM_H
-#define _UAPI_LINUX_ASHMEM_H
-
-#include <linux/ioctl.h>
-#include <linux/types.h>
-
-#define ASHMEM_NAME_LEN		256
-
-#define ASHMEM_NAME_DEF		"dev/ashmem"
-
-/* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
-#define ASHMEM_NOT_PURGED	0
-#define ASHMEM_WAS_PURGED	1
-
-/* Return values from ASHMEM_GET_PIN_STATUS: Is the mapping pinned? */
-#define ASHMEM_IS_UNPINNED	0
-#define ASHMEM_IS_PINNED	1
-
-struct ashmem_pin {
-	__u32 offset;	/* offset into region, in bytes, page-aligned */
-	__u32 len;	/* length forward from offset, in bytes, page-aligned */
-};
-
-#define __ASHMEMIOC		0x77
-
-#define ASHMEM_SET_NAME		_IOW(__ASHMEMIOC, 1, char[ASHMEM_NAME_LEN])
-#define ASHMEM_GET_NAME		_IOR(__ASHMEMIOC, 2, char[ASHMEM_NAME_LEN])
-#define ASHMEM_SET_SIZE		_IOW(__ASHMEMIOC, 3, size_t)
-#define ASHMEM_GET_SIZE		_IO(__ASHMEMIOC, 4)
-#define ASHMEM_SET_PROT_MASK	_IOW(__ASHMEMIOC, 5, unsigned long)
-#define ASHMEM_GET_PROT_MASK	_IO(__ASHMEMIOC, 6)
-#define ASHMEM_PIN		_IOW(__ASHMEMIOC, 7, struct ashmem_pin)
-#define ASHMEM_UNPIN		_IOW(__ASHMEMIOC, 8, struct ashmem_pin)
-#define ASHMEM_GET_PIN_STATUS	_IO(__ASHMEMIOC, 9)
-#define ASHMEM_PURGE_ALL_CACHES	_IO(__ASHMEMIOC, 10)
-
-#endif	/* _UAPI_LINUX_ASHMEM_H */
