cifs, msdos, vfat, hfs+: don't bother with parent in ->d_compare()

dentry->d_sb is just as good as parent->d_sb
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/cifs/dir.c

@@ -906,7 +906,7 @@ static int cifs_ci_hash(const struct dentry *dentry, struct qstr *q)
 static int cifs_ci_compare(const struct dentry *parent, const struct dentry *dentry,
 		unsigned int len, const char *str, const struct qstr *name)
 {
-	struct nls_table *codepage = CIFS_SB(parent->d_sb)->local_nls;
+	struct nls_table *codepage = CIFS_SB(dentry->d_sb)->local_nls;
 	wchar_t c1, c2;
 	int i, l1, l2;
 

fs/fat/namei_msdos.c

@@ -165,7 +165,7 @@ static int msdos_hash(const struct dentry *dentry, struct qstr *qstr)
 static int msdos_cmp(const struct dentry *parent, const struct dentry *dentry,
 		unsigned int len, const char *str, const struct qstr *name)
 {
-	struct fat_mount_options *options = &MSDOS_SB(parent->d_sb)->options;
+	struct fat_mount_options *options = &MSDOS_SB(dentry->d_sb)->options;
 	unsigned char a_msdos_name[MSDOS_NAME], b_msdos_name[MSDOS_NAME];
 	int error;
 

fs/fat/namei_vfat.c

@@ -141,7 +141,7 @@ static int vfat_hashi(const struct dentry *dentry, struct qstr *qstr)
 static int vfat_cmpi(const struct dentry *parent, const struct dentry *dentry,
 		unsigned int len, const char *str, const struct qstr *name)
 {
-	struct nls_table *t = MSDOS_SB(parent->d_sb)->nls_io;
+	struct nls_table *t = MSDOS_SB(dentry->d_sb)->nls_io;
 	unsigned int alen, blen;
 
 	/* A filename cannot end in '.' or we treat it like it has none */

fs/hfsplus/unicode.c

@@ -388,7 +388,7 @@ int hfsplus_hash_dentry(const struct dentry *dentry, struct qstr *str)
 int hfsplus_compare_dentry(const struct dentry *parent, const struct dentry *dentry,
 		unsigned int len, const char *str, const struct qstr *name)
 {
-	struct super_block *sb = parent->d_sb;
+	struct super_block *sb = dentry->d_sb;
 	int casefold, decompose, size;
 	int dsize1, dsize2, len1, len2;
 	const u16 *dstr1, *dstr2;

fs/hpfs/dentry.c

@@ -50,7 +50,7 @@ static int hpfs_compare_dentry(const struct dentry *parent, const struct dentry
 
 	if (hpfs_chk_name(name->name, &bl))
 		return 1;
-	if (hpfs_compare_names(parent->d_sb, str, al, name->name, bl, 0))
+	if (hpfs_compare_names(dentry->d_sb, str, al, name->name, bl, 0))
 		return 1;
 	return 0;
 }