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[RFC,2/4] types: add rcuref_long_t

Message ID 20241005-brauner-file-rcuref-v1-2-725d5e713c86@kernel.org (mailing list archive)
State New
Headers show
Series fs: port files to rcuref_long_t | expand

Commit Message

Christian Brauner Oct. 5, 2024, 7:16 p.m. UTC 
Add a variant of rcuref that operates on atomic_long_t instead of
atomic_t so it can be used for data structures that require
atomic_long_t.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 include/linux/types.h | 10 ++++++++++
 1 file changed, 10 insertions(+)
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Patch

diff --git a/include/linux/types.h b/include/linux/types.h
index 2bc8766ba20cab014a380f02e5644bd0d772ec67..b10bf351f3e4d1f1c1ca16248199470306de4aa0 100644
--- a/include/linux/types.h
+++ b/include/linux/types.h
@@ -190,6 +190,16 @@  typedef struct {
 
 #define RCUREF_INIT(i)	{ .refcnt = ATOMIC_INIT(i - 1) }
 
+typedef struct {
+#ifdef CONFIG_64BIT
+	atomic64_t refcnt;
+#else
+	atomic_t refcnt;
+#endif
+} rcuref_long_t;
+
+#define RCUREF_LONG_INIT(i)	{ .refcnt = ATOMIC_LONG_INIT(i - 1) }
+
 struct list_head {
 	struct list_head *next, *prev;
 };