From f39423084cf1f7958aea0c088b15c83a19b1c677 Mon Sep 17 00:00:00 2001
From: Joe Richey <joerichey@google.com>
Date: Mon, 6 Feb 2023 13:11:42 -0800
Subject: [PATCH] Use !0 instead of usize::MAX

We could use core::usize::MAX, but that is deprecated.

Signed-off-by: Joe Richey <joerichey@google.com>
---
 src/rdrand.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/rdrand.rs b/src/rdrand.rs
index 14dd8ed..c2e5297 100644
--- a/src/rdrand.rs
+++ b/src/rdrand.rs
@@ -50,8 +50,8 @@ compile_error!(
 // Fails with probability < 2^(-90) on 32-bit systems
 #[target_feature(enable = "rdrand")]
 unsafe fn self_test() -> bool {
-    // On AMD, RDRAND returns usize::MAX on failure, count it as a collision.
-    let mut prev = usize::MAX;
+    // On AMD, RDRAND returns 0xFF...FF on failure, count it as a collision.
+    let mut prev = !0; // TODO(MSRV 1.43): Move to usize::MAX
     let mut fails = 0;
     for _ in 0..8 {
         match rdrand() {