From: david.laight.linux@gmail.com
To: "Willy Tarreau" <w@1wt.eu>,
"Thomas Weißschuh" <linux@weissschuh.net>,
linux-kernel@vger.kernel.org, "Cheng Li" <lechain@gmail.com>
Cc: David Laight <david.laight.linux@gmail.com>
Subject: [PATCH v5 next 01/17] tools/nolibc: Add _NOLIBC_OPTIMIZER_HIDE_VAR() to compiler.h
Date: Sun, 8 Mar 2026 11:37:26 +0000 [thread overview]
Message-ID: <20260308113742.12649-2-david.laight.linux@gmail.com> (raw)
In-Reply-To: <20260308113742.12649-1-david.laight.linux@gmail.com>
From: David Laight <david.laight.linux@gmail.com>
Needed to stop compiler 'optimisations' bloating code.
Equivalent to the definition in include/linux/compiler.h
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: David Laight <david.laight.linux@gmail.com>
---
Unchanged for v5.
Changes for v4:
- Remove #if guard
tools/include/nolibc/compiler.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/include/nolibc/compiler.h b/tools/include/nolibc/compiler.h
index a8c7619dcdde..f03f84cfadce 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 */
--
2.39.5
next prev parent reply other threads:[~2026-03-08 11:37 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-08 11:37 [PATCH v5 next 00/17] Enhance printf() david.laight.linux
2026-03-08 11:37 ` david.laight.linux [this message]
2026-03-08 11:37 ` [PATCH v5 next 02/17] selftests/nolibc: Rename w to written in expect_vfprintf() david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 03/17] tools/nolibc: Implement strerror() in terms of strerror_r() david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 04/17] tools/nolibc: Rename the 'errnum' parameter to strerror() david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 05/17] tools/nolibc/printf: Output pad characters in 16 byte chunks david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 06/17] tools/nolibc/printf: Simplify __nolibc_printf() david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 07/17] tools/nolibc/printf: Use goto and reduce indentation david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 08/17] tools/nolibc/printf: Use bit-masks to hold requested flag, length and conversion chars david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 09/17] tools/nolibc/printf: Add support for length modifiers tzqL and formats iX david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 10/17] tools/nolibc/printf: Handle "%s" with the numeric formats david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 11/17] tools/nolibc/printf: Prepend sign to converted number david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 12/17] tools/nolibc/printf: Add support for conversion flags space and plus david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 13/17] tools/nolibc/printf: Special case 0 and add support for %#x david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 14/17] tools/nolibc/printf: Add support for left aligning fields david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 15/17] tools/nolibc/printf: Add support for zero padding and field precision david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 16/17] tools/nolibc/printf: Add support for octal output david.laight.linux
2026-03-08 11:37 ` [PATCH v5 next 17/17] selftests/nolibc: Use printf variable field widths and precisions david.laight.linux
2026-03-08 11:58 ` [PATCH v5 next 00/17] Enhance printf() Willy Tarreau
2026-03-08 21:01 ` Thomas Weißschuh
2026-03-08 22:41 ` David Laight
2026-03-09 6:55 ` Willy Tarreau
2026-03-09 9:20 ` David Laight
2026-03-13 20:07 ` Thomas Weißschuh
2026-03-13 22:40 ` David Laight
2026-03-14 4:48 ` Willy Tarreau
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