From: David Laight <david.laight.linux@gmail.com>
Date: Sun, 8 Mar 2026 11:37:26 +0000 (+0000)
Subject: tools/nolibc: Add _NOLIBC_OPTIMIZER_HIDE_VAR() to compiler.h
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6702425cd50ebb9a71d6b441df4b0df4f58d160a;p=thirdparty%2Fkernel%2Flinux.git

tools/nolibc: Add _NOLIBC_OPTIMIZER_HIDE_VAR() to compiler.h

Needed to stop compiler 'optimisations' bloating code.
Equivalent to the definition in include/linux/compiler.h

Signed-off-by: David Laight <david.laight.linux@gmail.com>
Acked-by: Willy Tarreau <w@1wt.eu>
Link: https://patch.msgid.link/20260308113742.12649-2-david.laight.linux@gmail.com
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---

diff --git a/tools/include/nolibc/compiler.h b/tools/include/nolibc/compiler.h
index a8c7619dcdde2..f03f84cfadce2 100644
--- a/tools/include/nolibc/compiler.h
+++ b/tools/include/nolibc/compiler.h
@@ -71,4 +71,7 @@
 #  define __nolibc_static_assert(_t)
 #endif
 
+/* Make the optimizer believe the variable can be manipulated arbitrarily. */
+#define _NOLIBC_OPTIMIZER_HIDE_VAR(var)	__asm__ ("" : "+r" (var))
+
 #endif /* _NOLIBC_COMPILER_H */