add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/btrfs/ctree.h
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@@ -17,6 +17,7 @@
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 #include <linux/wait.h>
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 #include <linux/slab.h>
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 #include <trace/events/btrfs.h>
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+#include <asm/kmap_types.h>
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 #include <asm/unaligned.h>
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 #include <linux/pagemap.h>
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 #include <linux/btrfs.h>
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@@ -527,8 +528,6 @@
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 	 */
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 	int bg_extent_count;
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 };
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-
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-bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
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 enum {
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 	BTRFS_FS_BARRIER,