From: Andi Kleen <andi@firstfloor.org>
To: linux-kernel@vger.kernel.org
Cc: sam@ravnborg.org, x86@kernel.org, linux-kbuild@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>
Subject: [PATCH 03/20] lto: Make asmlinkage __visible
Date: Tue, 18 Feb 2014 15:28:41 +0100 [thread overview]
Message-ID: <1392733738-8290-4-git-send-email-andi@firstfloor.org> (raw)
In-Reply-To: <1392733738-8290-1-git-send-email-andi@firstfloor.org>
From: Andi Kleen <ak@linux.intel.com>
With LTO the compiler needs to know which function can be
called from assembler, otherwise it would optimize
those functions away. We use the existing asmlinkage
for this, which is already used widely.
Note this causes warnings for static asmlinkage, which
is used in some places. These can be later cleaned up.
static asmlinkage usually makes no sense.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
include/linux/linkage.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/linux/linkage.h b/include/linux/linkage.h
index a6a42dd..34a513a 100644
--- a/include/linux/linkage.h
+++ b/include/linux/linkage.h
@@ -12,9 +12,9 @@
#endif
#ifdef __cplusplus
-#define CPP_ASMLINKAGE extern "C"
+#define CPP_ASMLINKAGE extern "C" __visible
#else
-#define CPP_ASMLINKAGE
+#define CPP_ASMLINKAGE __visible
#endif
#ifndef asmlinkage
--
1.8.5.2
next prev parent reply other threads:[~2014-02-18 14:29 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-18 14:28 Link Time Optimization patchkit v3 Andi Kleen
2014-02-18 14:28 ` [PATCH 01/20] x86, lto: Disable LTO for the x86 VDSO Andi Kleen
2014-02-18 14:28 ` [PATCH 02/20] lto: Disable LTO for hweight functions Andi Kleen
2014-02-18 14:28 ` Andi Kleen [this message]
2014-02-18 14:28 ` [PATCH 04/20] lto, workaround: Add workaround for initcall reordering Andi Kleen
2014-02-18 14:28 ` [PATCH 05/20] lto: Handle LTO common symbols in module loader Andi Kleen
2014-02-18 14:53 ` Konrad Rzeszutek Wilk
2014-02-18 14:28 ` [PATCH 06/20] lto: Disable LTO for sys_ni Andi Kleen
2014-02-18 14:28 ` [PATCH 07/20] lto: Don't let LATENCYTOP and LOCKDEP select KALLSYMS_ALL Andi Kleen
2014-02-18 14:28 ` [PATCH 08/20] Kbuild, lto, workaround: Don't warn for initcall_reference in modpost Andi Kleen
2014-02-18 14:28 ` [PATCH 09/20] Kbuild, lto: Drop .number postfixes " Andi Kleen
2014-02-18 14:28 ` [PATCH 10/20] Kbuild, lto: add ld-version and ld-ifversion macros Andi Kleen
2014-02-18 14:28 ` [PATCH 11/20] Kbuild, lto: Add a gcc-ld script to let run gcc as ld Andi Kleen
2014-02-18 14:28 ` [PATCH 12/20] Kbuild, lto: Disable LTO for asm-offsets.c Andi Kleen
2014-02-18 14:28 ` [PATCH 13/20] Kbuild, lto: Set TMPDIR for LTO v2 Andi Kleen
2014-02-18 14:35 ` H. Peter Anvin
2014-02-18 14:28 ` [PATCH 14/20] Kbuild, lto: Handle basic LTO in modpost Andi Kleen
2014-02-18 14:28 ` [PATCH 15/20] Kbuild, lto: Fix single pass kallsyms for LTO Andi Kleen
2014-02-18 14:28 ` [PATCH 16/20] Kbuild, lto: Add Link Time Optimization support v2 Andi Kleen
2014-02-18 14:28 ` [PATCH 17/20] Kbuild, bloat-o-meter: Ignore .lto_priv postfix Andi Kleen
2014-02-18 14:51 ` Konrad Rzeszutek Wilk
2014-02-18 14:28 ` [PATCH 18/20] lto: Mark spinlocks noinline when inline spinlocks are disabled Andi Kleen
2014-02-18 14:28 ` [PATCH 19/20] lto, module: Warn about modules that are not fully LTOed Andi Kleen
2014-02-18 14:50 ` Konrad Rzeszutek Wilk
2014-02-18 18:52 ` Andi Kleen
2014-02-18 14:28 ` [PATCH 20/20] lto: Don't inline __const_udelay Andi Kleen
2014-02-18 14:34 ` Link Time Optimization patchkit v3 H. Peter Anvin
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