smb: client: scope end_of_dacl to CIFS_DEBUG2 use in parse_dacl

After validate_dacl() was factored out in commit 149822e5541c, the
local end_of_dacl in parse_dacl() is only read by the dump_ace()
call under #ifdef CONFIG_CIFS_DEBUG2.  With CIFS_DEBUG2 off the
variable is assigned but never used, which gcc -W=1 flags as
-Wunused-but-set-variable.

Remove the local and compute the end-of-dacl pointer inline at the
single call site inside the existing CIFS_DEBUG2 guard.  No
functional change: when CIFS_DEBUG2 is enabled the argument value
is identical to what the removed local carried; when CIFS_DEBUG2
is disabled the code was already dead.

Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Fixes: 149822e5541c ("smb: client: validate the whole DACL before rewriting it in cifsacl")
Signed-off-by: Michael Bommarito <[email protected]>
Assisted-by: Claude:claude-opus-4-7
Signed-off-by: Steve French <[email protected]>

Author: mjbommar

fs/smb/client/cifsacl.c

@@ -836,7 +836,7 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
 	int i;
 	u16 num_aces = 0;
 	int acl_size;
-	char *acl_base, *end_of_dacl;
+	char *acl_base;
 	struct smb_ace **ppace;
 
 	/* BB need to add parm so we can store the SID BB */
@@ -860,7 +860,6 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
 	   user/group/other have no permissions */
 	fattr->cf_mode &= ~(0777);
 
-	end_of_dacl = (char *)pdacl + le16_to_cpu(pdacl->size);
 	acl_base = (char *)pdacl;
 	acl_size = sizeof(struct smb_acl);
 
@@ -876,7 +875,8 @@ static void parse_dacl(struct smb_acl *pdacl, char *end_of_acl,
 			ppace[i] = (struct smb_ace *) (acl_base + acl_size);
 
 #ifdef CONFIG_CIFS_DEBUG2
-			dump_ace(ppace[i], end_of_dacl);
+			dump_ace(ppace[i],
+				 (char *)pdacl + le16_to_cpu(pdacl->size));
 #endif
 			if (mode_from_special_sid &&
 			    ppace[i]->sid.num_subauth >= 3 &&