ext4: hash: simplify kzalloc(n * 1, ...) to kzalloc(n, ...)

sizeof(char) evaluates to 1. Remove the churn.

Signed-off-by: Ethan Carter Edwards <ethan@ethancedwards.com>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Link: https://patch.msgid.link/20250316-ext4-hash-kcalloc-v2-1-2a99e93ec6e0@ethancedwards.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

Author: ethancedwards8

fs/ext4/hash.c

@@ -302,7 +302,7 @@ int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
 
 	if (len && IS_CASEFOLDED(dir) &&
 	   (!IS_ENCRYPTED(dir) || fscrypt_has_encryption_key(dir))) {
-		buff = kzalloc(sizeof(char) * PATH_MAX, GFP_KERNEL);
+		buff = kzalloc(PATH_MAX, GFP_KERNEL);
 		if (!buff)
 			return -ENOMEM;