linux-next/lib/radix-tree.h

// 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);
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> 2023-05-16 19:41:54 +00:00			`// 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);`