exfat: Simplify exfat_utf8_d_hash() for code points above U+FFFF (dddf7da3) · Commits · 戴 / test

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:

Pali Rohár <pali@kernel.org> Signed-off-by:

Namjae Jeon <namjae.jeon@samsung.com>

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);

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