Re: [PATCH] tee: add FOLL_LONGTERM for CMA case when alloc shm

• u32 page_flag = FOLL_WRITE;

if (!tee_device_get(teedev)) return ERR_PTR(-EINVAL); @@ -255,9 +256,11 @@ register_shm_helper(struct tee_context *ctx, unsigned long addr, ret = ERR_PTR(-ENOMEM); goto err_free_shm; }

+#if IS_ENABLED(CONFIG_CMA)

• page_flag |= FOLL_LONGTERM;

+#endif if (flags & TEE_SHM_USER_MAPPED)

If this mapping is long live it should always use FOLL_LONGTERM.

The ifdef does not make sense.