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From: Maxime Coquelin <mcoquelin.stm32@gmail.com>
To: Russell King <linux@arm.linux.org.uk>,
	Arnd Bergmann <arnd@arndb.de>,
	u.kleine-koenig@pengutronix.de
Cc: linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	"Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>,
	"Russell King" <rmk+kernel@arm.linux.org.uk>
Subject: [PATCH] ARM: Re-enable TRACE_IRQFLAGS_SUPPORT on ARMv7-M
Date: Tue,  9 Jun 2015 00:24:48 +0200	[thread overview]
Message-ID: <1433802288-25508-1-git-send-email-mcoquelin.stm32@gmail.com> (raw)

Commit cb1293e2f594 ("ARM: 8375/1: disable some options on ARMv7-M") causes
build failure on ARMv7-M machines:

  CC      arch/arm/kernel/asm-offsets.s
In file included from include/linux/sem.h:5:0,
                 from include/linux/sched.h:35,
                 from arch/arm/kernel/asm-offsets.c:14:
include/linux/rcupdate.h: In function 'rcu_read_lock_sched_held':
include/linux/rcupdate.h:539:2: error: implicit declaration of function 'arch_irqs_disabled' [-Werror=implicit-function-declaration]
  return preempt_count() != 0 || irqs_disabled();
  ^
Commit cb1293e2f594 was initially introduced to fix build errors with randconfig,
as ARMv7-m selects TRACE_IRQFLAGS_SUPPORT but breaks build when TRACE_IRQFLAGS
is selected.

As there is no proper support yet for TRACE_IRQFLAGS, this patch partially
reverts commit cb1293e2f594, with the downside of build errors with randconfig
when TRACE_IRQFLAGS gets selected.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Maxime Coquelin <mcoquelin.stm32@gmail.com>
---
 arch/arm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index b47457d..e4e1694 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -171,7 +171,7 @@ config LOCKDEP_SUPPORT
 
 config TRACE_IRQFLAGS_SUPPORT
 	bool
-	default !CPU_V7M
+	default y
 
 config RWSEM_XCHGADD_ALGORITHM
 	bool
-- 
1.9.1


             reply	other threads:[~2015-06-08 22:24 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-06-08 22:24 Maxime Coquelin [this message]
2015-06-08 22:47 ` [PATCH] ARM: Re-enable TRACE_IRQFLAGS_SUPPORT on ARMv7-M Russell King - ARM Linux
2015-06-09  9:14   ` Maxime Coquelin
2015-06-09 11:41     ` Daniel Thompson
2015-06-09 14:42       ` Maxime Coquelin
2015-06-09 15:01       ` Russell King - ARM Linux
2015-06-09 17:37         ` Daniel Thompson
2015-06-10 10:03           ` Maxime Coquelin
2015-06-10 14:07           ` Joachim Eastwood

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