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From: Arnd Bergmann <arnd@arndb.de>
To: linux-arch@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@vger.kernel.org,
	Russell King <rmk+kernel@armlinux.org.uk>,
	Andrew Morton <akpm@linux-foundation.org>,
	kernel-build-reports@lists.linaro.org,
	kvmarm@lists.cs.columbia.edu, Arnd Bergmann <arnd@arndb.de>
Subject: [PATCH 10/13] asm-generic: mark cmpxchg as __always_inline for gcc-4.3
Date: Fri, 16 Dec 2016 11:56:31 +0100	[thread overview]
Message-ID: <20161216105634.235457-11-arnd@arndb.de> (raw)
Message-ID: <20161216105631.4_wGNn-R_gFcJsU1WNnc54pt_H7ATDzP9h9JRYRxcQo@z> (raw)
In-Reply-To: <20161216105634.235457-1-arnd@arndb.de>

With CONFIG_OPTIMIZE_INLINING and older compilers, we can get
a link error such as

kernel/task_work.o: In function `__cmpxchg_local_generic':
task_work.c:(.text+0x14c): undefined reference to `wrong_size_cmpxchg'
kernel/locking/rtmutex.o: In function `__cmpxchg_local_generic':
rtmutex.c:(.text+0x5ec): undefined reference to `wrong_size_cmpxchg'
kernel/trace/ring_buffer.o: In function `__cmpxchg_local_generic':

Marking the functions in question as __always_inline avoids that
possibility.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
---
 include/asm-generic/cmpxchg-local.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/include/asm-generic/cmpxchg-local.h b/include/asm-generic/cmpxchg-local.h
index 70bef78912b7..e82d7032b1b8 100644
--- a/include/asm-generic/cmpxchg-local.h
+++ b/include/asm-generic/cmpxchg-local.h
@@ -11,7 +11,8 @@ extern unsigned long wrong_size_cmpxchg(volatile void *ptr)
  * Generic version of __cmpxchg_local (disables interrupts). Takes an unsigned
  * long parameter, supporting various types of architectures.
  */
-static inline unsigned long __cmpxchg_local_generic(volatile void *ptr,
+static __always_inline unsigned long
+__cmpxchg_local_generic(volatile void *ptr,
 		unsigned long old, unsigned long new, int size)
 {
 	unsigned long flags, prev;
@@ -50,8 +51,8 @@ static inline unsigned long __cmpxchg_local_generic(volatile void *ptr,
 /*
  * Generic version of __cmpxchg64_local. Takes an u64 parameter.
  */
-static inline u64 __cmpxchg64_local_generic(volatile void *ptr,
-		u64 old, u64 new)
+static __always_inline u64
+__cmpxchg64_local_generic(volatile void *ptr, u64 old, u64 new)
 {
 	u64 prev;
 	unsigned long flags;
-- 
2.9.0


  parent reply	other threads:[~2016-12-16 10:57 UTC|newest]

Thread overview: 84+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-12-16 10:56 [RFC] minimum gcc version for kernel: raise to gcc-4.3 or 4.6? Arnd Bergmann
2016-12-16 10:56 ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 01/13] [HACK] gcc-4.5: avoid link errors for unused function pointers Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 02/13] KVM: arm: fix gcc-4.5 build Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2017-01-04 10:38   ` Christoffer Dall
2017-01-04 10:38     ` Christoffer Dall
2016-12-16 10:56 ` [PATCH 03/13] ARM: div64: fix building with gcc-4.5 and lower Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 04/13] vfio-pci: use 32-bit comparisons for register address for gcc-4.5 Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 15:30   ` Alex Williamson
2016-12-16 19:50     ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 05/13] clk: pxa: fix gcc-4.4 build Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 06/13] ARM: atomic: " Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 07/13] watchdog: kempld: fix gcc-4.3 build Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 08/13] arm/arm64: xen: avoid gcc-4.4 warning Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` [PATCH 09/13] ARM: mark cmpxchg and xchg __always_inline for gcc-4.3 Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 10:56 ` Arnd Bergmann [this message]
2016-12-16 10:56   ` [PATCH 10/13] asm-generic: mark cmpxchg as " Arnd Bergmann
2016-12-16 10:56 ` [PATCH 11/13] fs: fix unsigned enum warning with gcc-4.2 Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2017-01-03 22:47   ` Brendan Gregg
2017-02-28 21:53     ` Brendan Gregg
2016-12-16 10:56 ` [PATCH 12/13] KVM: arm: avoid binary number literals for gcc-4.2 Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2017-01-04 10:39   ` Christoffer Dall
2017-01-04 10:39     ` Christoffer Dall
2016-12-16 10:56 ` [PATCH 13/13] ARM: avoid 'Q' asm constraint for gcc-4.1 and earlier Arnd Bergmann
2016-12-16 10:56   ` Arnd Bergmann
2016-12-16 11:14 ` [RFC] minimum gcc version for kernel: raise to gcc-4.3 or 4.6? Arnd Bergmann
2016-12-16 11:14   ` Arnd Bergmann
2017-04-16 19:52   ` Kees Cook
2017-04-20 10:15     ` Arnd Bergmann
2017-04-20 19:52       ` Kees Cook
2017-04-20 19:52         ` Kees Cook
2017-04-21 20:55         ` Arnd Bergmann
2017-04-21 20:55           ` Arnd Bergmann
2017-04-21 21:05           ` Kees Cook
2017-04-21 21:05             ` Kees Cook
2017-04-22  3:10             ` Maciej W. Rozycki
2017-04-22  3:10               ` Maciej W. Rozycki
2017-04-22 15:30               ` Arnd Bergmann
2017-04-22 15:30                 ` Arnd Bergmann
2017-04-23 20:13                 ` Geert Uytterhoeven
2017-04-23 20:13                   ` Geert Uytterhoeven
2017-04-24  9:44                   ` Arnd Bergmann
2017-04-24  9:44                     ` Arnd Bergmann
2017-04-24 10:17                     ` Geert Uytterhoeven
2017-04-24 10:17                       ` Geert Uytterhoeven
2017-04-24 14:13                       ` Arnd Bergmann
2017-04-24 16:53                     ` Maciej W. Rozycki
2017-04-24 17:29                       ` Arnd Bergmann
2017-04-24 18:16                         ` Geert Uytterhoeven
2017-04-24 18:16                           ` Geert Uytterhoeven
2017-04-24 18:30                         ` Maciej W. Rozycki
2017-04-24 18:30                           ` Maciej W. Rozycki
2017-04-24 20:30                           ` Arnd Bergmann
2017-04-24 20:52                             ` Kees Cook
2017-04-25  7:06                               ` Geert Uytterhoeven
2017-04-25  7:06                                 ` Geert Uytterhoeven
2017-04-25  9:22     ` Suzuki K Poulose
2017-04-25  9:22       ` Suzuki K Poulose
2016-12-16 15:54 ` Geert Uytterhoeven
2016-12-16 15:54   ` Geert Uytterhoeven
2016-12-16 19:58   ` Arnd Bergmann
2016-12-16 19:58     ` Arnd Bergmann
2016-12-16 20:34     ` Geert Uytterhoeven
2016-12-16 20:34       ` Geert Uytterhoeven
2016-12-16 17:00 ` Sebastian Andrzej Siewior
2016-12-16 22:00   ` Arnd Bergmann
2016-12-16 22:00     ` Arnd Bergmann
2016-12-17 11:29     ` Sebastian Andrzej Siewior
2016-12-17 11:29       ` Sebastian Andrzej Siewior
2017-01-02 12:23       ` Russell King - ARM Linux
2017-01-02 12:23         ` Russell King - ARM Linux
2016-12-20  9:59     ` Heiko Carstens
2016-12-20  9:59       ` Heiko Carstens

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