From cc58dead4c79b88653b57b3b7a8088cd8e08ed46 Mon Sep 17 00:00:00 2001
From: Xing Xue <xingxue@outlook.com>
Date: Wed, 30 Jul 2025 15:12:11 -0400
Subject: [PATCH] Cast the 'addr' argument of 'madvise()' to match the AIX
 function signature in the 'libc' crate.

---
 src/sys/mman.rs | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/sys/mman.rs b/src/sys/mman.rs
index 867d207da3..bbb97f128b 100644
--- a/src/sys/mman.rs
+++ b/src/sys/mman.rs
@@ -555,9 +555,22 @@ pub unsafe fn madvise(
     length: size_t,
     advise: MmapAdvise,
 ) -> Result<()> {
+    let ptr = {
+        // The AIX signature of 'madvise()' differs from the POSIX specification,
+        // which expects 'void *' as the type of the 'addr' argument, whereas AIX uses
+        // 'caddr_t' (i.e., 'char *').
+        #[cfg(target_os = "aix")]
+        {
+            addr.as_ptr() as *mut u8
+        }
+        #[cfg(not(target_os = "aix"))]
+        {
+            addr.as_ptr()
+        }
+    };
+
     unsafe {
-        Errno::result(libc::madvise(addr.as_ptr(), length, advise as i32))
-            .map(drop)
+        Errno::result(libc::madvise(ptr, length, advise as i32)).map(drop)
     }
 }