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radix-tree: move declarations to header 

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.

[zhangpeng.00@bytedance.com: fix building radix tree test suite]
  Link: https://lkml.kernel.org/r/20230521095450.21332-1-zhangpeng.00@bytedance.com
Link: https://lkml.kernel.org/r/20230516194212.548910-1-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Peng Zhang <zhangpeng.00@bytedance.com>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Arnd Bergmann 2023-05-16 21:41:54 +02:00 committed by Andrew Morton
parent 2f012f2bac
commit bde1597d0f
4 changed files with 15 additions and 6 deletions
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2
lib/radix-tree.c
View File

@ -27,6 +27,8 @@
#include <linux/string.h>
#include <linux/xarray.h>
#include "radix-tree.h"
/*
* Radix tree node cache.
*/

8
lib/radix-tree.h Normal file
View File

@ -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);

6
lib/xarray.c
View File

@ -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)

5
tools/testing/radix-tree/Makefile
View File

@ -1,7 +1,7 @@
# SPDX-License-Identifier: GPL-2.0
CFLAGS += -I. -I../../include -g -Og -Wall -D_LGPL_SOURCE -fsanitize=address \
-fsanitize=undefined
CFLAGS += -I. -I../../include -I../../../lib -g -Og -Wall \
-D_LGPL_SOURCE -fsanitize=address -fsanitize=undefined
LDFLAGS += -fsanitize=address -fsanitize=undefined
LDLIBS+= -lpthread -lurcu
TARGETS = main idr-test multiorder xarray maple
@ -49,6 +49,7 @@ $(OFILES): Makefile *.h */*.h generated/map-shift.h generated/bit-length.h \
../../../include/linux/xarray.h \
../../../include/linux/maple_tree.h \
../../../include/linux/radix-tree.h \
../../../lib/radix-tree.h \
../../../include/linux/idr.h
radix-tree.c: ../../../lib/radix-tree.c