From c74983e8b480f7bf770e78a5e16bf381c219f570 Mon Sep 17 00:00:00 2001
From: Andrew Boie <andrew.p.boie@intel.com>
Date: Fri, 6 Oct 2017 12:53:55 -0700
Subject: [PATCH] kernel: remove some kernel objects from tracking

These are removed as the APIs that use them are not suitable for
exporting to userspace.

- Kernel workqueues run in supervisor mode, so it would not be
appropriate to allow user threads to submit work to them. A future
enhancement may extend or introduce parallel API where the workqueue
threads may run in user mode (or leave as an exercise to the user).

- Kernel slabs store private bookkeeping data inside the
user-accessible slab buffers themselves. Alternate APIs are planned
here for managing slabs of kernel objects, implemented within the
runtime library and not the kernel.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
---
 include/kernel.h            | 4 ----
 kernel/userspace.c          | 8 --------
 scripts/gen_kobject_list.py | 4 ----
 3 files changed, 16 deletions(-)

diff --git a/include/kernel.h b/include/kernel.h
index 786fd81ed04..d404d1f5d32 100644
--- a/include/kernel.h
+++ b/include/kernel.h
@@ -133,8 +133,6 @@ struct k_mem_partition;
 enum k_objects {
 	/* Core kernel objects */
 	K_OBJ_ALERT,
-	K_OBJ_DELAYED_WORK,
-	K_OBJ_MEM_SLAB,
 	K_OBJ_MSGQ,
 	K_OBJ_MUTEX,
 	K_OBJ_PIPE,
@@ -142,8 +140,6 @@ enum k_objects {
 	K_OBJ_STACK,
 	K_OBJ_THREAD,
 	K_OBJ_TIMER,
-	K_OBJ_WORK,
-	K_OBJ_WORK_Q,
 
 	/* Driver subsystems */
 	K_OBJ_DRIVER_ADC,
diff --git a/kernel/userspace.c b/kernel/userspace.c
index a9ac39d15ee..f3dc263528c 100644
--- a/kernel/userspace.c
+++ b/kernel/userspace.c
@@ -36,10 +36,6 @@ const char *otype_to_str(enum k_objects otype)
 	/* Core kernel objects */
 	case K_OBJ_ALERT:
 		return "k_alert";
-	case K_OBJ_DELAYED_WORK:
-		return "k_delayed_work";
-	case K_OBJ_MEM_SLAB:
-		return "k_mem_slab";
 	case K_OBJ_MSGQ:
 		return "k_msgq";
 	case K_OBJ_MUTEX:
@@ -54,10 +50,6 @@ const char *otype_to_str(enum k_objects otype)
 		return "k_thread";
 	case K_OBJ_TIMER:
 		return "k_timer";
-	case K_OBJ_WORK:
-		return "k_work";
-	case K_OBJ_WORK_Q:
-		return "k_work_q";
 
 	/* Driver subsystems */
 	case K_OBJ_DRIVER_ADC:
diff --git a/scripts/gen_kobject_list.py b/scripts/gen_kobject_list.py
index 4d213b962ca..7fac22ecbe2 100755
--- a/scripts/gen_kobject_list.py
+++ b/scripts/gen_kobject_list.py
@@ -22,8 +22,6 @@ if LooseVersion(elftools.__version__) < LooseVersion('0.24'):
 
 kobjects = [
         "k_alert",
-        "k_delayed_work",
-        "k_mem_slab",
         "k_msgq",
         "k_mutex",
         "k_pipe",
@@ -31,8 +29,6 @@ kobjects = [
         "k_stack",
         "k_thread",
         "k_timer",
-        "k_work",
-        "k_work_q",
         "device"
         ]