D18606.id52158.diff
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	Index: sys/compat/linuxkpi/common/include/linux/cdev.h
	===================================================================
	--- sys/compat/linuxkpi/common/include/linux/cdev.h
	+++ sys/compat/linuxkpi/common/include/linux/cdev.h
	@@ -52,7 +52,8 @@
	struct cdev *cdev;
	dev_t dev;
	const struct file_operations *ops;
	- atomic_long_t refs;
	+ u_int refs;
	+ u_int siref;
	};

	static inline void
	@@ -61,7 +62,7 @@

	kobject_init(&cdev->kobj, &linux_cdev_static_ktype);
	cdev->ops = ops;
	- atomic_long_set(&cdev->refs, 0);
	+ cdev->refs = 1;
	}

	static inline struct linux_cdev *
	@@ -70,8 +71,9 @@
	struct linux_cdev *cdev;

	cdev = kzalloc(sizeof(struct linux_cdev), M_WAITOK);
	- if (cdev)
	+ if (cdev != NULL)
	kobject_init(&cdev->kobj, &linux_cdev_ktype);
	+ cdev->refs = 1;
	return (cdev);
	}

	Index: sys/compat/linuxkpi/common/include/linux/mm.h
	===================================================================
	--- sys/compat/linuxkpi/common/include/linux/mm.h
	+++ sys/compat/linuxkpi/common/include/linux/mm.h
	@@ -180,12 +180,8 @@
	return (-ENOTSUP);
	}

	-static inline int
	-zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
	- unsigned long size)
	-{
	- return (-ENOTSUP);
	-}
	+int zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
	+ unsigned long size);

	static inline int
	remap_pfn_range(struct vm_area_struct *vma, unsigned long addr,
	Index: sys/compat/linuxkpi/common/src/linux_compat.c
	===================================================================
	--- sys/compat/linuxkpi/common/src/linux_compat.c
	+++ sys/compat/linuxkpi/common/src/linux_compat.c
	@@ -40,6 +40,7 @@
	#include <sys/proc.h>
	#include <sys/sglist.h>
	#include <sys/sleepqueue.h>
	+#include <sys/refcount.h>
	#include <sys/lock.h>
	#include <sys/mutex.h>
	#include <sys/bus.h>
	@@ -100,6 +101,7 @@
	#undef cdev
	#define RB_ROOT(head) (head)->rbh_root

	+static void linux_cdev_deref(struct linux_cdev *ldev);
	static struct vm_area_struct linux_cdev_handle_find(void handle);

	struct kobject linux_class_root;
	@@ -538,7 +540,7 @@
	struct vm_fault vmf;

	/* fill out VM fault structure */
	- vmf.virtual_address = (void *)((uintptr_t)pidx << PAGE_SHIFT);
	+ vmf.virtual_address = (void *)IDX_TO_OFF(pidx);
	vmf.flags = (fault_type & VM_PROT_WRITE) ? FAULT_FLAG_WRITE : 0;
	vmf.pgoff = 0;
	vmf.page = NULL;
	@@ -672,6 +674,73 @@
	},
	};

	+int
	+zap_vma_ptes(struct vm_area_struct *vma, unsigned long address,
	+ unsigned long size)
	+{
	+ vm_object_t obj;
	+ vm_page_t m;
	+
	+ obj = vma->vm_obj;
	+ if (obj == NULL \|\| (obj->flags & OBJ_UNMANAGED) != 0)
	+ return (-ENOTSUP);
	+ VM_OBJECT_RLOCK(obj);
	+ for (m = vm_page_find_least(obj, OFF_TO_IDX(address));
	+ m != NULL && m->pindex < OFF_TO_IDX(address + size);
	+ m = TAILQ_NEXT(m, listq))
	+ pmap_remove_all(m);
	+ VM_OBJECT_RUNLOCK(obj);
	+ return (0);
	+}
	+
	+
	+static struct file_operations dummy_ldev_ops = {
	+ /* XXXKIB */
	+};
	+
	+static struct linux_cdev dummy_ldev = {
	+ .ops = &dummy_ldev_ops,
	+};
	+
	+#define LDEV_SI_DTR 0x0001
	+#define LDEV_SI_REF 0x0002
	+
	+static void
	+linux_get_fop(struct linux_file filp, const struct file_operations *fop,
	+ struct linux_cdev **dev)
	+{
	+ struct linux_cdev *ldev;
	+ u_int siref;
	+
	+ ldev = filp->f_cdev;
	+ if (ldev != NULL) {
	+ for (siref = ldev->siref;;) {
	+ if ((siref & LDEV_SI_DTR) != 0) {
	+ ldev = &dummy_ldev;
	+ siref = ldev->siref;
	+ MPASS((ldev->siref & LDEV_SI_DTR) == 0);
	+ } else if (atomic_fcmpset_int(&ldev->siref, &siref,
	+ siref + LDEV_SI_REF)) {
	+ break;
	+ }
	+ }
	+ *fop = ldev->ops;
	+ } else {
	+ *fop = filp->f_op;
	+ }
	+ *dev = ldev;
	+}
	+
	+static void
	+linux_drop_fop(struct linux_cdev *ldev)
	+{
	+
	+ if (ldev == NULL)
	+ return;
	+ MPASS((ldev->siref & ~LDEV_SI_DTR) != 0);
	+ atomic_subtract_int(&ldev->siref, LDEV_SI_REF);
	+}
	+
	#define OPW(fp,td,code) ({ \
	struct file *__fpop; \
	__typeof(code) __retval; \
	@@ -684,10 +753,12 @@
	})

	static int
	-linux_dev_fdopen(struct cdev dev, int fflags, struct thread td, struct file *file)
	+linux_dev_fdopen(struct cdev dev, int fflags, struct thread td,
	+ struct file *file)
	{
	struct linux_cdev *ldev;
	struct linux_file *filp;
	+ const struct file_operations *fop;
	int error;

	ldev = dev->si_drv1;
	@@ -699,20 +770,17 @@
	filp->f_flags = file->f_flag;
	filp->f_vnode = file->f_vnode;
	filp->_file = file;
	+ refcount_acquire(&ldev->refs);
	filp->f_cdev = ldev;

	linux_set_current(td);
	+ linux_get_fop(filp, &fop, &ldev);

	- /* get a reference on the Linux character device */
	- if (atomic_long_add_unless(&ldev->refs, 1, -1L) == 0) {
	- kfree(filp);
	- return (EINVAL);
	- }
	-
	- if (filp->f_op->open) {
	- error = -filp->f_op->open(file->f_vnode, filp);
	- if (error) {
	- atomic_long_dec(&ldev->refs);
	+ if (fop->open != NULL) {
	+ error = -fop->open(file->f_vnode, filp);
	+ if (error != 0) {
	+ linux_drop_fop(ldev);
	+ linux_cdev_deref(filp->f_cdev);
	kfree(filp);
	return (error);
	}
	@@ -723,6 +791,7 @@

	/* release the file from devfs */
	finit(file, filp->f_mode, DTYPE_DEV, filp, &linuxfileops);
	+ linux_drop_fop(ldev);
	return (ENXIO);
	}

	@@ -858,7 +927,8 @@

	static int
	linux_file_ioctl_sub(struct file fp, struct linux_file filp,
	- u_long cmd, caddr_t data, struct thread *td)
	+ const struct file_operations *fop, u_long cmd, caddr_t data,
	+ struct thread *td)
	{
	struct task_struct *task = current;
	unsigned size;
	@@ -883,20 +953,28 @@
	#if defined(__amd64__)
	if (td->td_proc->p_elf_machine == EM_386) {
	/* try the compat IOCTL handler first */
	- if (filp->f_op->compat_ioctl != NULL)
	- error = -OPW(fp, td, filp->f_op->compat_ioctl(filp, cmd, (u_long)data));
	- else
	+ if (fop->compat_ioctl != NULL) {
	+ error = -OPW(fp, td, fop->compat_ioctl(filp,
	+ cmd, (u_long)data));
	+ } else {
	error = ENOTTY;
	+ }

	/* fallback to the regular IOCTL handler, if any */
	- if (error == ENOTTY && filp->f_op->unlocked_ioctl != NULL)
	- error = -OPW(fp, td, filp->f_op->unlocked_ioctl(filp, cmd, (u_long)data));
	+ if (error == ENOTTY && fop->unlocked_ioctl != NULL) {
	+ error = -OPW(fp, td, fop->unlocked_ioctl(filp,
	+ cmd, (u_long)data));
	+ }
	} else
	#endif
	- if (filp->f_op->unlocked_ioctl != NULL)
	- error = -OPW(fp, td, filp->f_op->unlocked_ioctl(filp, cmd, (u_long)data));
	- else
	- error = ENOTTY;
	+ {
	+ if (fop->unlocked_ioctl != NULL) {
	+ error = -OPW(fp, td, fop->unlocked_ioctl(filp,
	+ cmd, (u_long)data));
	+ } else {
	+ error = ENOTTY;
	+ }
	+ }
	if (size > 0) {
	task->bsd_ioctl_data = NULL;
	task->bsd_ioctl_len = 0;
	@@ -1065,30 +1143,36 @@
	static void
	linux_file_kqfilter_poll(struct linux_file *filp, int kqflags)
	{
	+ struct thread *td;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	int temp;

	- if (filp->f_kqflags & kqflags) {
	- struct thread *td = curthread;
	-
	- /* get the latest polling state */
	- temp = OPW(filp->_file, td, filp->f_op->poll(filp, NULL));
	-
	- spin_lock(&filp->f_kqlock);
	- /* clear kqflags */
	- filp->f_kqflags &= ~(LINUX_KQ_FLAG_NEED_READ \|
	- LINUX_KQ_FLAG_NEED_WRITE);
	- /* update kqflags */
	- if (temp & (POLLIN \| POLLOUT)) {
	- if (temp & POLLIN)
	- filp->f_kqflags \|= LINUX_KQ_FLAG_NEED_READ;
	- if (temp & POLLOUT)
	- filp->f_kqflags \|= LINUX_KQ_FLAG_NEED_WRITE;
	-
	- /* make sure the "knote" gets woken up */
	- KNOTE_LOCKED(&filp->f_selinfo.si_note, 0);
	- }
	- spin_unlock(&filp->f_kqlock);
	+ if ((filp->f_kqflags & kqflags) == 0)
	+ return;
	+
	+ td = curthread;
	+
	+ linux_get_fop(filp, &fop, &ldev);
	+ /* get the latest polling state */
	+ temp = OPW(filp->_file, td, fop->poll(filp, NULL));
	+ linux_drop_fop(ldev);
	+
	+ spin_lock(&filp->f_kqlock);
	+ /* clear kqflags */
	+ filp->f_kqflags &= ~(LINUX_KQ_FLAG_NEED_READ \|
	+ LINUX_KQ_FLAG_NEED_WRITE);
	+ /* update kqflags */
	+ if ((temp & (POLLIN \| POLLOUT)) != 0) {
	+ if ((temp & POLLIN) != 0)
	+ filp->f_kqflags \|= LINUX_KQ_FLAG_NEED_READ;
	+ if ((temp & POLLOUT) != 0)
	+ filp->f_kqflags \|= LINUX_KQ_FLAG_NEED_WRITE;
	+
	+ /* make sure the "knote" gets woken up */
	+ KNOTE_LOCKED(&filp->f_selinfo.si_note, 0);
	}
	+ spin_unlock(&filp->f_kqlock);
	}

	static int
	@@ -1137,9 +1221,9 @@
	}

	static int
	-linux_file_mmap_single(struct file fp, vm_ooffset_t offset,
	- vm_size_t size, struct vm_object **object, int nprot,
	- struct thread *td)
	+linux_file_mmap_single(struct file fp, const struct file_operations fop,
	+ vm_ooffset_t offset, vm_size_t size, struct vm_object *object,
	+ int nprot, struct thread *td)
	{
	struct task_struct *task;
	struct vm_area_struct *vmap;
	@@ -1151,7 +1235,7 @@
	filp = (struct linux_file *)fp->f_data;
	filp->f_flags = fp->f_flag;

	- if (filp->f_op->mmap == NULL)
	+ if (fop->mmap == NULL)
	return (EOPNOTSUPP);

	linux_set_current(td);
	@@ -1181,7 +1265,7 @@
	if (unlikely(down_write_killable(&vmap->vm_mm->mmap_sem))) {
	error = linux_get_error(task, EINTR);
	} else {
	- error = -OPW(fp, td, filp->f_op->mmap(filp, vmap));
	+ error = -OPW(fp, td, fop->mmap(filp, vmap));
	error = linux_get_error(task, error);
	up_write(&vmap->vm_mm->mmap_sem);
	}
	@@ -1300,6 +1384,8 @@
	int flags, struct thread *td)
	{
	struct linux_file *filp;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	ssize_t bytes;
	int error;

	@@ -1312,8 +1398,10 @@
	if (uio->uio_resid > DEVFS_IOSIZE_MAX)
	return (EINVAL);
	linux_set_current(td);
	- if (filp->f_op->read) {
	- bytes = OPW(file, td, filp->f_op->read(filp, uio->uio_iov->iov_base,
	+ linux_get_fop(filp, &fop, &ldev);
	+ if (fop->read != NULL) {
	+ bytes = OPW(file, td, fop->read(filp,
	+ uio->uio_iov->iov_base,
	uio->uio_iov->iov_len, &uio->uio_offset));
	if (bytes >= 0) {
	uio->uio_iov->iov_base =
	@@ -1328,6 +1416,7 @@

	/* update kqfilter status, if any */
	linux_file_kqfilter_poll(filp, LINUX_KQ_FLAG_HAS_READ);
	+ linux_drop_fop(ldev);

	return (error);
	}
	@@ -1337,10 +1426,11 @@
	int flags, struct thread *td)
	{
	struct linux_file *filp;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	ssize_t bytes;
	int error;

	- error = 0;
	filp = (struct linux_file *)file->f_data;
	filp->f_flags = file->f_flag;
	/* XXX no support for I/O vectors currently */
	@@ -1349,14 +1439,17 @@
	if (uio->uio_resid > DEVFS_IOSIZE_MAX)
	return (EINVAL);
	linux_set_current(td);
	- if (filp->f_op->write) {
	- bytes = OPW(file, td, filp->f_op->write(filp, uio->uio_iov->iov_base,
	+ linux_get_fop(filp, &fop, &ldev);
	+ if (fop->write != NULL) {
	+ bytes = OPW(file, td, fop->write(filp,
	+ uio->uio_iov->iov_base,
	uio->uio_iov->iov_len, &uio->uio_offset));
	if (bytes >= 0) {
	uio->uio_iov->iov_base =
	((uint8_t *)uio->uio_iov->iov_base) + bytes;
	uio->uio_iov->iov_len -= bytes;
	uio->uio_resid -= bytes;
	+ error = 0;
	} else {
	error = linux_get_error(current, -bytes);
	}
	@@ -1366,6 +1459,8 @@
	/* update kqfilter status, if any */
	linux_file_kqfilter_poll(filp, LINUX_KQ_FLAG_HAS_WRITE);

	+ linux_drop_fop(ldev);
	+
	return (error);
	}

	@@ -1374,16 +1469,21 @@
	struct thread *td)
	{
	struct linux_file *filp;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	int revents;

	filp = (struct linux_file *)file->f_data;
	filp->f_flags = file->f_flag;
	linux_set_current(td);
	- if (filp->f_op->poll != NULL)
	- revents = OPW(file, td, filp->f_op->poll(filp, LINUX_POLL_TABLE_NORMAL)) & events;
	- else
	+ linux_get_fop(filp, &fop, &ldev);
	+ if (fop->poll != NULL) {
	+ revents = OPW(file, td, fop->poll(filp,
	+ LINUX_POLL_TABLE_NORMAL)) & events;
	+ } else {
	revents = 0;
	-
	+ }
	+ linux_drop_fop(ldev);
	return (revents);
	}

	@@ -1391,23 +1491,28 @@
	linux_file_close(struct file file, struct thread td)
	{
	struct linux_file *filp;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	int error;

	filp = (struct linux_file *)file->f_data;

	- KASSERT(file_count(filp) == 0, ("File refcount(%d) is not zero", file_count(filp)));
	+ KASSERT(file_count(filp) == 0,
	+ ("File refcount(%d) is not zero", file_count(filp)));

	+ error = 0;
	filp->f_flags = file->f_flag;
	linux_set_current(td);
	linux_poll_wait_dequeue(filp);
	- error = -OPW(file, td, filp->f_op->release(filp->f_vnode, filp));
	+ linux_get_fop(filp, &fop, &ldev);
	+ if (fop->release != NULL)
	+ error = -OPW(file, td, fop->release(filp->f_vnode, filp));
	funsetown(&filp->f_sigio);
	if (filp->f_vnode != NULL)
	vdrop(filp->f_vnode);
	- if (filp->f_cdev != NULL) {
	- /* put a reference on the Linux character device */
	- atomic_long_dec(&filp->f_cdev->refs);
	- }
	+ linux_drop_fop(ldev);
	+ if (filp->f_cdev != NULL)
	+ linux_cdev_deref(filp->f_cdev);
	kfree(filp);

	return (error);
	@@ -1418,27 +1523,30 @@
	struct thread *td)
	{
	struct linux_file *filp;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	int error;

	+ error = 0;
	filp = (struct linux_file *)fp->f_data;
	filp->f_flags = fp->f_flag;
	- error = 0;
	+ linux_get_fop(filp, &fop, &ldev);

	linux_set_current(td);
	switch (cmd) {
	case FIONBIO:
	break;
	case FIOASYNC:
	- if (filp->f_op->fasync == NULL)
	+ if (fop->fasync == NULL)
	break;
	- error = -OPW(fp, td, filp->f_op->fasync(0, filp, fp->f_flag & FASYNC));
	+ error = -OPW(fp, td, fop->fasync(0, filp, fp->f_flag & FASYNC));
	break;
	case FIOSETOWN:
	error = fsetown((int )data, &filp->f_sigio);
	if (error == 0) {
	- if (filp->f_op->fasync == NULL)
	+ if (fop->fasync == NULL)
	break;
	- error = -OPW(fp, td, filp->f_op->fasync(0, filp,
	+ error = -OPW(fp, td, fop->fasync(0, filp,
	fp->f_flag & FASYNC));
	}
	break;
	@@ -1446,16 +1554,17 @@
	(int )data = fgetown(&filp->f_sigio);
	break;
	default:
	- error = linux_file_ioctl_sub(fp, filp, cmd, data, td);
	+ error = linux_file_ioctl_sub(fp, filp, fop, cmd, data, td);
	break;
	}
	+ linux_drop_fop(ldev);
	return (error);
	}

	static int
	linux_file_mmap_sub(struct thread *td, vm_size_t objsize, vm_prot_t prot,
	vm_prot_t maxprotp, int flagsp, struct file *fp,
	- vm_ooffset_t foff, vm_object_t objp)
	+ vm_ooffset_t foff, const struct file_operations fop, vm_object_t *objp)
	{
	/*
	* Character devices do not provide private mappings
	@@ -1467,7 +1576,8 @@
	if ((*flagsp & (MAP_PRIVATE \| MAP_COPY)) != 0)
	return (EINVAL);

	- return (linux_file_mmap_single(fp, foff, objsize, objp, (int)prot, td));
	+ return (linux_file_mmap_single(fp, fop, foff, objsize, objp,
	+ (int)prot, td));
	}

	static int
	@@ -1476,6 +1586,8 @@
	struct thread *td)
	{
	struct linux_file *filp;
	+ const struct file_operations *fop;
	+ struct linux_cdev *ldev;
	struct mount *mp;
	struct vnode *vp;
	vm_object_t object;
	@@ -1522,15 +1634,18 @@
	}
	maxprot &= cap_maxprot;

	- error = linux_file_mmap_sub(td, size, prot, &maxprot, &flags, fp, &foff,
	- &object);
	+ linux_get_fop(filp, &fop, &ldev);
	+ error = linux_file_mmap_sub(td, size, prot, &maxprot, &flags, fp,
	+ &foff, fop, &object);
	if (error != 0)
	- return (error);
	+ goto out;

	error = vm_mmap_object(map, addr, size, prot, maxprot, flags, object,
	foff, FALSE, td);
	if (error != 0)
	vm_object_deallocate(object);
	+out:
	+ linux_drop_fop(ldev);
	return (error);
	}

	@@ -1951,6 +2066,14 @@
	return (isdone);
	}

	+static void
	+linux_cdev_deref(struct linux_cdev *ldev)
	+{
	+
	+ if (refcount_release(&ldev->refs))
	+ kfree(ldev);
	+}
	+
	static void
	linux_cdev_release(struct kobject *kobj)
	{
	@@ -1960,7 +2083,7 @@
	cdev = container_of(kobj, struct linux_cdev, kobj);
	parent = kobj->parent;
	linux_destroy_dev(cdev);
	- kfree(cdev);
	+ linux_cdev_deref(cdev);
	kobject_put(parent);
	}

	@@ -1977,20 +2100,19 @@
	}

	void
	-linux_destroy_dev(struct linux_cdev *cdev)
	+linux_destroy_dev(struct linux_cdev *ldev)
	{

	- if (cdev->cdev == NULL)
	+ if (ldev->cdev == NULL)
	return;

	- atomic_long_dec(&cdev->refs);
	-
	- /* wait for all open files to be closed */
	- while (atomic_long_read(&cdev->refs) != -1L)
	- pause("ldevdrn", hz);
	+ MPASS((ldev->siref & LDEV_SI_DTR) == 0);
	+ atomic_set_int(&ldev->siref, LDEV_SI_DTR);
	+ while ((atomic_load_int(&ldev->siref) & ~LDEV_SI_DTR) != 0)
	+ pause("ldevdtr", hz / 4);

	- destroy_dev(cdev->cdev);
	- cdev->cdev = NULL;
	+ destroy_dev(ldev->cdev);
	+ ldev->cdev = NULL;
	}

	const struct kobj_type linux_cdev_ktype = {
	Index: sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
	===================================================================
	--- sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
	+++ sys/dev/mlx5/mlx5_ib/mlx5_ib_main.c
	@@ -1335,6 +1335,70 @@
	return 0;
	}

	+static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
	+{
	+ int ret;
	+ struct vm_area_struct *vma;
	+ struct mlx5_ib_vma_private_data vma_private, n;
	+ struct mlx5_ib_ucontext *context = to_mucontext(ibcontext);
	+ struct task_struct *owning_process = NULL;
	+ struct mm_struct *owning_mm = NULL;
	+
	+ owning_process = get_pid_task(ibcontext->tgid, PIDTYPE_PID);
	+ if (!owning_process)
	+ return;
	+
	+ owning_mm = get_task_mm(owning_process);
	+ if (!owning_mm) {
	+ pr_info("no mm, disassociate ucontext is pending task termination\n");
	+ while (1) {
	+ put_task_struct(owning_process);
	+ usleep_range(1000, 2000);
	+ owning_process = get_pid_task(ibcontext->tgid,
	+ PIDTYPE_PID);
	+ if (!owning_process \|\|
	+#if 0
	+ owning_process->state == TASK_DEAD
	+#else
	+ owning_process->task_thread->td_proc->p_state == PRS_ZOMBIE
	+#endif
	+ ) {
	+ pr_info("disassociate ucontext done, task was terminated\n");
	+ /* in case task was dead need to release the
	+ * task struct.
	+ */
	+ if (owning_process)
	+ put_task_struct(owning_process);
	+ return;
	+ }
	+ }
	+ }
	+
	+ /* need to protect from a race on closing the vma as part of
	+ * mlx5_ib_vma_close.
	+ */
	+ down_write(&owning_mm->mmap_sem);
	+ list_for_each_entry_safe(vma_private, n, &context->vma_private_list,
	+ list) {
	+ vma = vma_private->vma;
	+ ret = zap_vma_ptes(vma, vma->vm_start,
	+ PAGE_SIZE);
	+ WARN_ONCE(ret, "%s: zap_vma_ptes failed", __func__);
	+ /* context going to be destroyed, should
	+ * not access ops any more.
	+ */
	+#if 0
	+ vma->vm_flags &= ~(VM_SHARED \| VM_MAYSHARE);
	+#endif
	+ vma->vm_ops = NULL;
	+ list_del(&vma_private->list);
	+ kfree(vma_private);
	+ }
	+ up_write(&owning_mm->mmap_sem);
	+ mmput(owning_mm);
	+ put_task_struct(owning_process);
	+}
	+
	static inline char *mmap_cmd2str(enum mlx5_ib_mmap_cmd cmd)
	{
	switch (cmd) {
	@@ -3084,6 +3148,8 @@
	dev->ib_dev.set_vf_guid = mlx5_ib_set_vf_guid;
	}

	+ dev->ib_dev.disassociate_ucontext = mlx5_ib_disassociate_ucontext;
	+
	mlx5_ib_internal_fill_odp_caps(dev);

	if (MLX5_CAP_GEN(mdev, imaicl)) {

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