add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/include/linux/ramfs.h
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@@ -7,6 +7,7 @@
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 struct inode *ramfs_get_inode(struct super_block *sb, const struct inode *dir,
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 	 umode_t mode, dev_t dev);
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 extern int ramfs_init_fs_context(struct fs_context *fc);
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+extern void ramfs_kill_sb(struct super_block *sb);
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 #ifdef CONFIG_MMU
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 static inline int