diff --git a/arch/x86/purgatory/purgatory.c b/arch/x86/purgatory/purgatory.c
index 655139dd0532..45836aca1a4b 100644
--- a/arch/x86/purgatory/purgatory.c
+++ b/arch/x86/purgatory/purgatory.c
@@ -21,7 +21,7 @@ u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE] __section(".kexec-purgatory");
 
 struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX] __section(".kexec-purgatory");
 
-static int verify_sha256_digest(void)
+static bool verify_sha256_digest(void)
 {
 	struct kexec_sha_region *ptr, *end;
 	u8 digest[SHA256_DIGEST_SIZE];
@@ -31,22 +31,16 @@ static int verify_sha256_digest(void)
 	end = purgatory_sha_regions + ARRAY_SIZE(purgatory_sha_regions);
 
 	for (ptr = purgatory_sha_regions; ptr < end; ptr++)
-		sha256_update(&sctx, (uint8_t *)(ptr->start), ptr->len);
+		sha256_update(&sctx, (const u8 *)(ptr->start), ptr->len);
 
 	sha256_final(&sctx, digest);
 
-	if (memcmp(digest, purgatory_sha256_digest, sizeof(digest)))
-		return 1;
-
-	return 0;
+	return !memcmp(digest, purgatory_sha256_digest, sizeof(digest));
 }
 
 void purgatory(void)
 {
-	int ret;
-
-	ret = verify_sha256_digest();
-	if (ret) {
+	if (!verify_sha256_digest()) {
 		/* loop forever */
 		for (;;)
 			;