This is a note to let you know that I've just added the patch titled
compiler-gcc.h: Introduce __optimize function attribute
to the 4.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
compiler-gcc.h-introduce-__optimize-function-attribute.patch
and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From df5d45aa08f848b79caf395211b222790534ccc7 Mon Sep 17 00:00:00 2001
From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Date: Thu, 1 Feb 2018 11:21:58 +0100
Subject: compiler-gcc.h: Introduce __optimize function attribute
From: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
commit df5d45aa08f848b79caf395211b222790534ccc7 upstream.
Create a new function attribute __optimize, which allows to specify an
optimization level on a per-function basis.
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Acked-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/linux/compiler-gcc.h | 4 ++++
include/linux/compiler.h | 4 ++++
2 files changed, 8 insertions(+)
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -196,6 +196,10 @@
#endif /* __CHECKER__ */
#endif /* GCC_VERSION >= 40300 */
+#if GCC_VERSION >= 40400
+#define __optimize(level) __attribute__((__optimize__(level)))
+#endif /* GCC_VERSION >= 40400 */
+
#if GCC_VERSION >= 40500
#ifndef __CHECKER__
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -266,6 +266,10 @@ static __always_inline void __write_once
#endif /* __ASSEMBLY__ */
+#ifndef __optimize
+# define __optimize(level)
+#endif
+
/* Compile time object size, -1 for unknown */
#ifndef __compiletime_object_size
# define __compiletime_object_size(obj) -1
Patches currently in stable-queue which might be from geert@xxxxxxxxxxxxxx are
queue-4.14/compiler-gcc.h-__nostackprotector-needs-gcc-4.4-and-up.patch
queue-4.14/compiler-gcc.h-introduce-__optimize-function-attribute.patch