The patch titled
Subject: radix-tree: move declarations to header
has been added to the -mm mm-hotfixes-unstable branch. Its filename is
radix-tree-move-declarations-to-header.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/radix-tree-move-declarations-to-header.patch
This patch will later appear in the mm-hotfixes-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next via the mm-everything
branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there every 2-3 working days
------------------------------------------------------
From: Arnd Bergmann <arnd@xxxxxxxx>
Subject: radix-tree: move declarations to header
Date: Tue, 16 May 2023 21:41:54 +0200
The xarray.c file contains the only call to radix_tree_node_rcu_free(),
and it comes with its own extern declaration for it. This means the
function definition causes a missing-prototype warning:
lib/radix-tree.c:288:6: error: no previous prototype for 'radix_tree_node_rcu_free' [-Werror=missing-prototypes]
Instead, move the declaration for this function to a new header that can
be included by both, and do the same for the radix_tree_node_cachep
variable that has the same underlying problem but does not cause a warning
with gcc.
Link: https://lkml.kernel.org/r/20230516194212.548910-1-arnd@xxxxxxxxxx
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
lib/radix-tree.c | 2 ++
lib/radix-tree.h | 8 ++++++++
lib/xarray.c | 6 ++----
3 files changed, 12 insertions(+), 4 deletions(-)
--- a/lib/radix-tree.c~radix-tree-move-declarations-to-header
+++ a/lib/radix-tree.c
@@ -27,6 +27,8 @@
#include <linux/string.h>
#include <linux/xarray.h>
+#include "radix-tree.h"
+
/*
* Radix tree node cache.
*/
--- /dev/null
+++ a/lib/radix-tree.h
@@ -0,0 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0+
+/* radix-tree helpers that are only shared with xarray */
+
+struct kmem_cache;
+struct rcu_head;
+
+extern struct kmem_cache *radix_tree_node_cachep;
+extern void radix_tree_node_rcu_free(struct rcu_head *head);
--- a/lib/xarray.c~radix-tree-move-declarations-to-header
+++ a/lib/xarray.c
@@ -12,6 +12,8 @@
#include <linux/slab.h>
#include <linux/xarray.h>
+#include "radix-tree.h"
+
/*
* Coding conventions in this file:
*
@@ -247,10 +249,6 @@ void *xas_load(struct xa_state *xas)
}
EXPORT_SYMBOL_GPL(xas_load);
-/* Move the radix tree node cache here */
-extern struct kmem_cache *radix_tree_node_cachep;
-extern void radix_tree_node_rcu_free(struct rcu_head *head);
-
#define XA_RCU_FREE ((struct xarray *)1)
static void xa_node_free(struct xa_node *node)
_
Patches currently in -mm which might be from arnd@xxxxxxxx are
radix-tree-move-declarations-to-header.patch
kasan-add-kasan_tag_mismatch-prototype.patch
kasan-use-internal-prototypes-matching-gcc-13-builtins.patch
