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sched/rt, Kconfig: Unbreak def/oldconfig with CONFIG_PREEMPT=y

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The merge of the CONFIG_PREEMPT_RT stub renamed CONFIG_PREEMPT to
CONFIG_PREEMPT_LL which causes all defconfigs which have CONFIG_PREEMPT=y
set to fall back to CONFIG_PREEMPT_NONE because CONFIG_PREEMPT depends on
the preemption mode choice wich defaults to NONE. This also affects
oldconfig builds.

So rather than changing 114 defconfig files and being an annoyance to
users, revert the rename and select a new config symbol PREEMPTION. That
keeps everything working smoothly and the revelant ifdef's are going to be
fixed up step by step.

Reported-by: Mark Rutland <mark.rutland@arm.com>
Fixes: a50a3f4b6a ("sched/rt, Kconfig: Introduce CONFIG_PREEMPT_RT")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Thomas Gleixner 2019-07-22 17:59:19 +02:00
parent 5f9e832c13
commit b8d3349803
1 changed files with 4 additions and 4 deletions
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8
kernel/Kconfig.preempt
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@ -35,10 +35,10 @@ config PREEMPT_VOLUNTARY
Select this if you are building a kernel for a desktop system.
config PREEMPT_LL
config PREEMPT
bool "Preemptible Kernel (Low-Latency Desktop)"
depends on !ARCH_NO_PREEMPT
select PREEMPT
select PREEMPTION
select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK
help
This option reduces the latency of the kernel by making
@ -58,7 +58,7 @@ config PREEMPT_LL
config PREEMPT_RT
bool "Fully Preemptible Kernel (Real-Time)"
depends on EXPERT && ARCH_SUPPORTS_RT
select PREEMPT
select PREEMPTION
help
This option turns the kernel into a real-time kernel by replacing
various locking primitives (spinlocks, rwlocks, etc.) with
@ -77,6 +77,6 @@ endchoice
config PREEMPT_COUNT
bool
config PREEMPT
config PREEMPTION
bool
select PREEMPT_COUNT