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

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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>
This commit is contained in:
Pali Rohár 2020-03-17 23:25:52 +01:00 committed by Namjae Jeon
parent 31f5acc0aa
commit dddf7da398
1 changed files with 2 additions and 8 deletions
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10
fs/exfat/namei.c
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@ -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);