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Subject[PATCH] ARM: Re-enable TRACE_IRQFLAGS_SUPPORT on ARMv7-M
Date
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


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