The patch titled
Subject: Revert "scripts/gdb: add a Radix Tree Parser"
has been removed from the -mm tree. Its filename was
revert-scripts-gdb-add-a-radix-tree-parser.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Kieran Bingham <kieran@xxxxxxxxxxxxxxx>
Subject: Revert "scripts/gdb: add a Radix Tree Parser"
This reverts commit e127a73d41ac ("scripts/gdb: add a Radix Tree Parser")
The python implementation of radix-tree was merged at the same time as the
radix-tree system was heavily reworked from commit e9256efcc8e3
("radix-tree: introduce radix_tree_empty") to 3bcadd6fa6c4 ("radix-tree:
free up the bottom bit of exceptional entries for reuse") and no longer
functions, but also prevents other gdb scripts from loading.
This functionality has not yet hit a release, so simply remove it for now
Link: http://lkml.kernel.org/r/1467127337-11135-6-git-send-email-kieran@xxxxxxxxxxx
Signed-off-by: Kieran Bingham <kieran@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/gdb/linux/constants.py.in | 7 --
scripts/gdb/linux/radixtree.py | 97 ----------------------------
scripts/gdb/vmlinux-gdb.py | 1
3 files changed, 105 deletions(-)
diff -puN scripts/gdb/linux/constants.py.in~revert-scripts-gdb-add-a-radix-tree-parser scripts/gdb/linux/constants.py.in
--- a/scripts/gdb/linux/constants.py.in~revert-scripts-gdb-add-a-radix-tree-parser
+++ a/scripts/gdb/linux/constants.py.in
@@ -14,7 +14,6 @@
#include <linux/fs.h>
#include <linux/mount.h>
-#include <linux/radix-tree.h>
/* We need to stringify expanded macros so that they can be parsed */
@@ -51,9 +50,3 @@ LX_VALUE(MNT_NOEXEC)
LX_VALUE(MNT_NOATIME)
LX_VALUE(MNT_NODIRATIME)
LX_VALUE(MNT_RELATIME)
-
-/* linux/radix-tree.h */
-LX_VALUE(RADIX_TREE_INDIRECT_PTR)
-LX_GDBPARSED(RADIX_TREE_HEIGHT_MASK)
-LX_GDBPARSED(RADIX_TREE_MAP_SHIFT)
-LX_GDBPARSED(RADIX_TREE_MAP_MASK)
diff -puN scripts/gdb/linux/radixtree.py~revert-scripts-gdb-add-a-radix-tree-parser /dev/null
--- a/scripts/gdb/linux/radixtree.py
+++ /dev/null
@@ -1,97 +0,0 @@
-#
-# gdb helper commands and functions for Linux kernel debugging
-#
-# Radix Tree Parser
-#
-# Copyright (c) 2016 Linaro Ltd
-#
-# Authors:
-# Kieran Bingham <kieran.bingham@xxxxxxxxxx>
-#
-# This work is licensed under the terms of the GNU GPL version 2.
-#
-
-import gdb
-
-from linux import utils
-from linux import constants
-
-radix_tree_root_type = utils.CachedType("struct radix_tree_root")
-radix_tree_node_type = utils.CachedType("struct radix_tree_node")
-
-
-def is_indirect_ptr(node):
- long_type = utils.get_long_type()
- return (node.cast(long_type) & constants.LX_RADIX_TREE_INDIRECT_PTR)
-
-
-def indirect_to_ptr(node):
- long_type = utils.get_long_type()
- node_type = node.type
- indirect_ptr = node.cast(long_type) & ~constants.LX_RADIX_TREE_INDIRECT_PTR
- return indirect_ptr.cast(node_type)
-
-
-def maxindex(height):
- height = height & constants.LX_RADIX_TREE_HEIGHT_MASK
- return gdb.parse_and_eval("height_to_maxindex["+str(height)+"]")
-
-
-def lookup(root, index):
- if root.type == radix_tree_root_type.get_type().pointer():
- root = root.dereference()
- elif root.type != radix_tree_root_type.get_type():
- raise gdb.GdbError("Must be struct radix_tree_root not {}"
- .format(root.type))
-
- node = root['rnode']
- if node is 0:
- return None
-
- if not (is_indirect_ptr(node)):
- if (index > 0):
- return None
- return node
-
- node = indirect_to_ptr(node)
-
- height = node['path'] & constants.LX_RADIX_TREE_HEIGHT_MASK
- if (index > maxindex(height)):
- return None
-
- shift = (height-1) * constants.LX_RADIX_TREE_MAP_SHIFT
-
- while True:
- new_index = (index >> shift) & constants.LX_RADIX_TREE_MAP_MASK
- slot = node['slots'][new_index]
-
- node = slot.cast(node.type.pointer()).dereference()
- if node is 0:
- return None
-
- shift -= constants.LX_RADIX_TREE_MAP_SHIFT
- height -= 1
-
- if (height <= 0):
- break
-
- return node
-
-
-class LxRadixTree(gdb.Function):
- """ Lookup and return a node from a RadixTree.
-
-$lx_radix_tree_lookup(root_node [, index]): Return the node at the given index.
-If index is omitted, the root node is dereferenced and returned."""
-
- def __init__(self):
- super(LxRadixTree, self).__init__("lx_radix_tree_lookup")
-
- def invoke(self, root, index=0):
- result = lookup(root, index)
- if result is None:
- raise gdb.GdbError("No entry in tree at index {}".format(index))
-
- return result
-
-LxRadixTree()
diff -puN scripts/gdb/vmlinux-gdb.py~revert-scripts-gdb-add-a-radix-tree-parser scripts/gdb/vmlinux-gdb.py
--- a/scripts/gdb/vmlinux-gdb.py~revert-scripts-gdb-add-a-radix-tree-parser
+++ a/scripts/gdb/vmlinux-gdb.py
@@ -31,4 +31,3 @@ else:
import linux.lists
import linux.proc
import linux.constants
- import linux.radixtree
_
Patches currently in -mm which might be from kieran@xxxxxxxxxxxxxxx are
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