Update info regarding arguments where BTF task struct pointers are required.

docs/linux/helper-function/bpf_get_task_stack.md

@@ -13,8 +13,8 @@ description: "This page documents the 'bpf_get_task_stack' eBPF helper function,
 > Copyright (c) 2015 The Libbpf Authors. All rights reserved.
 
 
-<!-- [HELPER_FUNC_DEF] -->
-Return a user or a kernel stack in bpf program provided buffer. Note: the user stack will only be populated if the _task_ is the current task; all other tasks will return -EOPNOTSUPP. To achieve this, the helper needs _task_, which is a valid pointer to **struct task_struct**. To store the stacktrace, the bpf program provides _buf_ with a nonnegative _size_.
+
+Return a user or a kernel stack in bpf program provided buffer. Note: the user stack will only be populated if the _task_ is the current task; all other tasks will return -EOPNOTSUPP. To achieve this, the helper needs _task_, which is a valid BTF pointer to **struct task_struct**, see [bpf_get_current_task_btf](../helper-function/bpf_get_current_task_btf.md) for more information. To store the stacktrace, the bpf program provides _buf_ with a nonnegative _size_.
 
 The last argument, _flags_, holds the number of stack frames to skip (from 0 to 255), masked with **BPF_F_SKIP_FIELD_MASK**. The next bits can be used to set the following flags:
 
@@ -37,7 +37,6 @@ The last argument, _flags_, holds the number of stack frames to skip (from 0 to
 The non-negative copied _buf_ length equal to or less than _size_ on success, or a negative error in case of failure.
 
 `#!c static long (* const bpf_get_task_stack)(struct task_struct *task, void *buf, __u32 size, __u64 flags) = (void *) 141;`
-<!-- [/HELPER_FUNC_DEF] -->
 
 ## Usage
 

docs/linux/helper-function/bpf_task_pt_regs.md

@@ -13,15 +13,14 @@ description: "This page documents the 'bpf_task_pt_regs' eBPF helper function, i
 > Copyright (c) 2015 The Libbpf Authors. All rights reserved.
 
 
-<!-- [HELPER_FUNC_DEF] -->
-Get the struct pt_regs associated with **task**.
+Get the struct pt_regs associated with **task**. Expects a BTF pointer to the "current" task. See [bpf_get_current_task_btf](../helper-function/bpf_get_current_task_btf.md) for more information.
 
 ### Returns
 
 A pointer to struct pt_regs.
 
 `#!c static long (* const bpf_task_pt_regs)(struct task_struct *task) = (void *) 175;`
-<!-- [/HELPER_FUNC_DEF] -->
+
 
 ## Usage
 

docs/linux/helper-function/bpf_task_storage_delete.md

@@ -13,8 +13,9 @@ description: "This page documents the 'bpf_task_storage_delete' eBPF helper func
 > Copyright (c) 2015 The Libbpf Authors. All rights reserved.
 
 
-<!-- [HELPER_FUNC_DEF] -->
+
 Delete a bpf_local_storage from a _task_.
+The map must be of **BPF_MAP_TYPE_TASK_STORAGE** type and the second argument a valid BTF pointer to **struct task_struct**.
 
 ### Returns
 
@@ -23,7 +24,7 @@ Delete a bpf_local_storage from a _task_.
 **-ENOENT** if the bpf_local_storage cannot be found.
 
 `#!c static long (* const bpf_task_storage_delete)(void *map, struct task_struct *task) = (void *) 157;`
-<!-- [/HELPER_FUNC_DEF] -->
+
 
 ## Usage
 

docs/linux/helper-function/bpf_task_storage_get.md

@@ -13,10 +13,10 @@ description: "This page documents the 'bpf_task_storage_get' eBPF helper functio
 > Copyright (c) 2015 The Libbpf Authors. All rights reserved.
 
 
-<!-- [HELPER_FUNC_DEF] -->
-Get a bpf_local_storage from the _task_.
 
-Logically, it could be thought of as getting the value from a _map_ with _task_ as the **key**.  From this perspective,  the usage is not much different from **bpf_map_lookup_elem**(_map_, **&**_task_) except this helper enforces the key must be a task_struct and the map must also be a **BPF_MAP_TYPE_TASK_STORAGE**.
+Get a bpf_local_storage from the _task_. 
+
+Logically, it could be thought of as getting the value from a _map_ with _task_ as the **key**. From this perspective, the usage is not much different from **bpf_map_lookup_elem**(_map_, **&**_task_) except this helper enforces the key must be a valid BTF pointer to **struct task_struct** (see [bpf_get_current_task_btf](../helper-function/bpf_get_current_task_btf.md) for more information), and the map must also be a **BPF_MAP_TYPE_TASK_STORAGE**. 
 
 Underneath, the value is stored locally at _task_ instead of the _map_.  The _map_ is used as the bpf-local-storage "type". The bpf-local-storage "type" (i.e. the _map_) is searched against all bpf_local_storage residing at _task_.
 
@@ -29,7 +29,7 @@ A bpf_local_storage pointer is returned on success.
 **NULL** if not found or there was an error in adding a new bpf_local_storage.
 
 `#!c static void *(* const bpf_task_storage_get)(void *map, struct task_struct *task, void *value, __u64 flags) = (void *) 156;`
-<!-- [/HELPER_FUNC_DEF] -->
+
 
 ## Usage