From fcad15456b04ec59e2ab7df7ba27a4d8933c7f6a Mon Sep 17 00:00:00 2001
From: John Baldwin <jhb@FreeBSD.org>
Date: Tue, 27 Aug 2024 17:16:19 -0400
Subject: [PATCH] aligned_alloc: Permit alignment values smaller than
 sizeof(uintptr_t) (#671)

posix_memalign() requires alignment values of at least
sizeof(uintptr_t), but aligned_alloc() does not.  memalign() regressed
to require larger alignment in commit
6cbc50fe2c255b5b47ea63f4cf759a6a20f6e7a6.

Fixes #668
---
 src/snmalloc/global/libc.h | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/snmalloc/global/libc.h b/src/snmalloc/global/libc.h
index 700fd390..2a6db38a 100644
--- a/src/snmalloc/global/libc.h
+++ b/src/snmalloc/global/libc.h
@@ -145,8 +145,7 @@ namespace snmalloc::libc
 
   inline void* memalign(size_t alignment, size_t size)
   {
-    if (SNMALLOC_UNLIKELY(
-          alignment < sizeof(uintptr_t) || !bits::is_pow2(alignment)))
+    if (SNMALLOC_UNLIKELY(alignment == 0 || !bits::is_pow2(alignment)))
     {
       return set_error(EINVAL);
     }