From: Hisam Mehboob <hisamshar@gmail.com>
To: acme@kernel.org
Cc: shuah@kernel.org, seanjc@google.com,
linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org,
Hisam Mehboob <hisamshar@gmail.com>,
Aqib Faruqui <aqibaf@amazon.com>
Subject: [PATCH] tools/include/linux/bitops.h: undef PAGE_SIZE after including limits.h
Date: Fri, 8 May 2026 04:48:55 +0500 [thread overview]
Message-ID: <20260507234854.273536-2-hisamshar@gmail.com> (raw)
musl libc defines PAGE_SIZE as a signed int in <limits.h>
under _GNU_SOURCE, conflicting with kernel headers that
require an unsigned 64-bit definition:
include/x86/processor.h:372:9: warning: 'PAGE_SIZE' redefined
/usr/include/x86_64-linux-musl/limits.h:97:9: note: this is the
location of the previous definition
Undefine PAGE_SIZE immediately after the #include <limits.h> to
prevent musl's definition from leaking into kernel headers. This
is a no-op on glibc, which does not define PAGE_SIZE in <limits.h>.
Reported-by: Aqib Faruqui <aqibaf@amazon.com>
Link: https://lore.kernel.org/kvm/aL8e0MMa4U2-nstQ@google.com/
Signed-off-by: Hisam Mehboob <hisamshar@gmail.com>
---
tools/include/linux/bitops.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/include/linux/bitops.h b/tools/include/linux/bitops.h
index b4e4cd071f8c..62117a77ceb5 100644
--- a/tools/include/linux/bitops.h
+++ b/tools/include/linux/bitops.h
@@ -4,6 +4,7 @@
#include <asm/types.h>
#include <limits.h>
+#undef PAGE_SIZE
#ifndef __WORDSIZE
#define __WORDSIZE (__SIZEOF_LONG__ * 8)
#endif
--
2.51.0
reply other threads:[~2026-05-07 23:50 UTC|newest]
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