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| author |   Daniel Rosenberg <drosen@google.com> | 2020-07-08 02:12:34 -0700 |
|---|---|---|
| committer |   Jaegeuk Kim <jaegeuk@kernel.org> | 2020-09-10 14:03:31 -0700 |
| commit | 3d7bfea8b8378277a25b42b28fe5a2a5ca76a7cf (patch) | |
| tree | 70947df66e566caf2bd0bc776c4ca85417fc7747 /include/linux/unicode.h | |
| parent | f2fs: compress: use more readable atomic_t type for {cic,dic}.ref (diff) | |
| download | linux-dev-3d7bfea8b8378277a25b42b28fe5a2a5ca76a7cf.tar.xz linux-dev-3d7bfea8b8378277a25b42b28fe5a2a5ca76a7cf.zip | |
unicode: Add utf8_casefold_hash
This adds a case insensitive hash function to allow taking the hash
without needing to allocate a casefolded copy of the string.
The existing d_hash implementations for casefolding allocate memory
within rcu-walk, by avoiding it we can be more efficient and avoid
worrying about a failed allocation.
Signed-off-by: Daniel Rosenberg <drosen@google.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'include/linux/unicode.h')
| -rw-r--r-- | include/linux/unicode.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/unicode.h b/include/linux/unicode.h index 990aa97d8049..74484d44c755 100644 --- a/include/linux/unicode.h +++ b/include/linux/unicode.h @@ -27,6 +27,9 @@ int utf8_normalize(const struct unicode_map *um, const struct qstr *str, int utf8_casefold(const struct unicode_map *um, const struct qstr *str, unsigned char *dest, size_t dlen); +int utf8_casefold_hash(const struct unicode_map *um, const void *salt, + struct qstr *str); + struct unicode_map *utf8_load(const char *version); void utf8_unload(struct unicode_map *um); |