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radix_tree: add radix_tree_dump

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This is debug code which is #if 0 out.

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox <willy@linux.intel.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Matthew Wilcox 2016-03-17 14:21:57 -07:00 committed by Linus Torvalds
parent e614523653
commit 7cf19af4de
1 changed files with 35 additions and 0 deletions
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35
lib/radix-tree.c
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@ -173,6 +173,41 @@ radix_tree_find_next_bit(const unsigned long *addr,
return size;
}
#if 0
static void dump_node(void *slot, int height, int offset)
{
struct radix_tree_node *node;
int i;
if (!slot)
return;
if (height == 0) {
pr_debug("radix entry %p offset %d\n", slot, offset);
return;
}
node = indirect_to_ptr(slot);
pr_debug("radix node: %p offset %d tags %lx %lx %lx path %x count %d parent %p\n",
slot, offset, node->tags[0][0], node->tags[1][0],
node->tags[2][0], node->path, node->count, node->parent);
for (i = 0; i < RADIX_TREE_MAP_SIZE; i++)
dump_node(node->slots[i], height - 1, i);
}
/* For debug */
static void radix_tree_dump(struct radix_tree_root *root)
{
pr_debug("radix root: %p height %d rnode %p tags %x\n",
root, root->height, root->rnode,
root->gfp_mask >> __GFP_BITS_SHIFT);
if (!radix_tree_is_indirect_ptr(root->rnode))
return;
dump_node(root->rnode, root->height, 0);
}
#endif
/*
* This assumes that the caller has performed appropriate preallocation, and
* that the caller has pinned this thread of control to the current CPU.