Convert 'alloc_flex' family to use the new default GFP_KERNEL argument

This is the exact same thing as the 'alloc_obj()' version, only much
smaller because there are a lot fewer users of the *alloc_flex()
interface.

As with alloc_obj() version, this was done entirely with mindless brute
force, using the same script, except using 'flex' in the pattern rather
than 'objs*'.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

security/integrity/ima/ima_modsig.c

@@ -65,7 +65,7 @@ int ima_read_modsig(enum ima_hooks func, const void *buf, loff_t buf_len,
 	buf_len -= sig_len + sizeof(*sig);
 
 	/* Allocate sig_len additional bytes to hold the raw PKCS#7 data. */
-	hdr = kzalloc_flex(*hdr, raw_pkcs7, sig_len, GFP_KERNEL);
+	hdr = kzalloc_flex(*hdr, raw_pkcs7, sig_len);
 	if (!hdr)
 		return -ENOMEM;
 

security/integrity/ima/ima_policy.c

@@ -342,7 +342,7 @@ static struct ima_rule_opt_list *ima_alloc_rule_opt_list(const substring_t *src)
 		return ERR_PTR(-EINVAL);
 	}
 
-	opt_list = kzalloc_flex(*opt_list, items, count, GFP_KERNEL);
+	opt_list = kzalloc_flex(*opt_list, items, count);
 	if (!opt_list) {
 		kfree(src_copy);
 		return ERR_PTR(-ENOMEM);

security/landlock/domain.c

@@ -95,7 +95,7 @@ static struct landlock_details *get_current_details(void)
 	 * caller.
 	 */
 	details =
-		kzalloc_flex(*details, exe_path, path_size, GFP_KERNEL);
+		kzalloc_flex(*details, exe_path, path_size);
 	if (!details)
 		return ERR_PTR(-ENOMEM);
 

security/loadpin/loadpin.c

@@ -327,7 +327,7 @@ static int read_trusted_verity_root_digests(unsigned int fd)
 
 		len /= 2;
 
-		trd = kzalloc_flex(*trd, data, len, GFP_KERNEL);
+		trd = kzalloc_flex(*trd, data, len);
 		if (!trd) {
 			rc = -ENOMEM;
 			goto err;