add led

hc

2024-05-10 10ebd8556b7990499c896a550e3d416b444211e6

 kernel/include/linux/iversion.h
..
..
@@ -113,6 +113,30 @@
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 }
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 /**
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+ * inode_set_max_iversion_raw - update i_version new value is larger
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+ * @inode: inode to set
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+ * @val: new i_version to set
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+ *
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+ * Some self-managed filesystems (e.g Ceph) will only update the i_version
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+ * value if the new value is larger than the one we already have.
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+ */
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+static inline void
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+inode_set_max_iversion_raw(struct inode *inode, u64 val)
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+{
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+	u64 cur, old;
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+
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+	cur = inode_peek_iversion_raw(inode);
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+	for (;;) {
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+		if (cur > val)
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+			break;
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+		old = atomic64_cmpxchg(&inode->i_version, cur, val);
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+		if (likely(old == cur))
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+			break;
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+		cur = old;
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+	}
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+}
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+
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+/**
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  * inode_set_iversion - set i_version to a particular value
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  * @inode: inode to set
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  * @val: new i_version value to set