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exfat: Simplify exfat_utf8_d_cmp() for code points above U+FFFF

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If two Unicode code points represented in UTF-16 are different then also
their UTF-32 representation must be different. 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 22:34:33 +01:00
committed by Namjae Jeon
parent 3d77e6a880
commit 197298a649
1 changed files with 2 additions and 7 deletions
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7
fs/exfat/namei.c
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@ -185,13 +185,8 @@ static int exfat_utf8_d_cmp(const struct dentry *dentry, unsigned int len,
if (u_a <= 0xFFFF && u_b <= 0xFFFF) { if (u_a <= 0xFFFF && u_b <= 0xFFFF) {
if (exfat_toupper(sb, u_a) != exfat_toupper(sb, u_b)) if (exfat_toupper(sb, u_a) != exfat_toupper(sb, u_b))
return 1; return 1;
} else if (u_a > 0xFFFF && u_b > 0xFFFF) {
if (exfat_low_surrogate(u_a) !=
exfat_low_surrogate(u_b) ||
exfat_high_surrogate(u_a) !=
exfat_high_surrogate(u_b))
return 1;
} else { } else {
if (u_a != u_b)
return 1; return 1;
} }
} }