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RDMA/uverbs: Hoist the common process of disassociate_ucontext into ib core

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This patch hoisted the common process of disassociate_ucontext
callback function into ib core code, and these code are common
to ervery ib_device driver.

Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
Acked-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Wei Hu(Xavier)
2018-05-28 19:39:26 +08:00
committed by Doug Ledford
부모 0b25c9cc53
커밋 a0976f418d
3개의 변경된 파일과 41개의 추가작업 그리고 69개의 파일을 삭제
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34
drivers/infiniband/hw/mlx5/main.c
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@@ -1973,38 +1973,7 @@ static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
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 ||
owning_process->state == TASK_DEAD) {
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);
mutex_lock(&context->vma_private_list_mutex);
list_for_each_entry_safe(vma_private, n, &context->vma_private_list,
list) {
@@ -2021,9 +1990,6 @@ static void mlx5_ib_disassociate_ucontext(struct ib_ucontext *ibcontext)
kfree(vma_private);
}
mutex_unlock(&context->vma_private_list_mutex);
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)