Commit dddf7da3 authored by Pali Rohár's avatar Pali Rohár Committed by Namjae Jeon
Browse files

exfat: Simplify exfat_utf8_d_hash() for code points above U+FFFF 



Function partial_name_hash() takes long type value into which can be stored
one Unicode code point. Therefore conversion from UTF-32 to UTF-16 is not
needed.

Signed-off-by: default avatarPali Rohár <pali@kernel.org>
Signed-off-by: default avatarNamjae Jeon <namjae.jeon@samsung.com>
parent 31f5acc0

fs/exfat/namei.c

+2 −8
Original line number Diff line number Diff line
@@ -147,16 +147,10 @@ static int exfat_utf8_d_hash(const struct dentry *dentry, struct qstr *qstr) 
			return charlen;



		/*

		 * Convert to UTF-16: code points above U+FFFF are encoded as

		 * surrogate pairs.

		 * exfat_toupper() works only for code points up to the U+FFFF.

		 */

		if (u > 0xFFFF) {

			hash = partial_name_hash(exfat_high_surrogate(u), hash);

			hash = partial_name_hash(exfat_low_surrogate(u), hash);

		} else {

			hash = partial_name_hash(exfat_toupper(sb, u), hash);

		}

		hash = partial_name_hash(u <= 0xFFFF ? exfat_toupper(sb, u) : u,

					 hash);

	}



	qstr->hash = end_name_hash(hash);