add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/f2fs/hash.c
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@@ -12,7 +12,6 @@
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 #include <linux/types.h>
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 #include <linux/fs.h>
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 #include <linux/f2fs_fs.h>
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-#include <linux/cryptohash.h>
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 #include <linux/pagemap.h>
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 #include <linux/unicode.h>
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@@ -92,7 +91,7 @@
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 /*
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  * Compute @fname->hash.  For all directories, @fname->disk_name must be set.
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  * For casefolded directories, @fname->usr_fname must be set, and also
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- * @fname->cf_name if the filename is valid Unicode.
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+ * @fname->cf_name if the filename is valid Unicode and is not "." or "..".
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  */
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 void f2fs_hash_filename(const struct inode *dir, struct f2fs_filename *fname)
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 {
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@@ -111,10 +110,11 @@
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 		/*
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 		 * If the casefolded name is provided, hash it instead of the
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 		 * on-disk name.  If the casefolded name is *not* provided, that
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-		 * should only be because the name wasn't valid Unicode, so fall
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-		 * back to treating the name as an opaque byte sequence.  Note
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-		 * that to handle encrypted directories, the fallback must use
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-		 * usr_fname (plaintext) rather than disk_name (ciphertext).
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+		 * should only be because the name wasn't valid Unicode or was
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+		 * "." or "..", so fall back to treating the name as an opaque
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+		 * byte sequence.  Note that to handle encrypted directories,
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+		 * the fallback must use usr_fname (plaintext) rather than
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+		 * disk_name (ciphertext).
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 		 */
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 		WARN_ON_ONCE(!fname->usr_fname->name);
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 		if (fname->cf_name.name) {