From 08861d33d680838753f1f9d3ba9480d3651b764d Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Wed, 19 Sep 2018 13:39:26 +0100 Subject: [PATCH] preempt: Move PREEMPT_NEED_RESCHED definition into arch code PREEMPT_NEED_RESCHED is never used directly, so move it into the arch code where it can potentially be implemented using either a different bit in the preempt count or as an entirely separate entity. Cc: Robert Love Cc: Thomas Gleixner Cc: Peter Zijlstra Cc: Martin Schwidefsky Acked-by: Peter Zijlstra (Intel) Signed-off-by: Will Deacon --- arch/s390/include/asm/preempt.h | 2 ++ arch/x86/include/asm/preempt.h | 3 +++ include/linux/preempt.h | 3 --- 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/s390/include/asm/preempt.h b/arch/s390/include/asm/preempt.h index 23a14d187fb1..b5ea9e14c017 100644 --- a/arch/s390/include/asm/preempt.h +++ b/arch/s390/include/asm/preempt.h @@ -8,6 +8,8 @@ #ifdef CONFIG_HAVE_MARCH_Z196_FEATURES +/* We use the MSB mostly because its available */ +#define PREEMPT_NEED_RESCHED 0x80000000 #define PREEMPT_ENABLED (0 + PREEMPT_NEED_RESCHED) static inline int preempt_count(void) diff --git a/arch/x86/include/asm/preempt.h b/arch/x86/include/asm/preempt.h index 90cb2f36c042..99a7fa9ab0a3 100644 --- a/arch/x86/include/asm/preempt.h +++ b/arch/x86/include/asm/preempt.h @@ -8,6 +8,9 @@ DECLARE_PER_CPU(int, __preempt_count); +/* We use the MSB mostly because its available */ +#define PREEMPT_NEED_RESCHED 0x80000000 + /* * We use the PREEMPT_NEED_RESCHED bit as an inverted NEED_RESCHED such * that a decrement hitting 0 means we can and should reschedule. diff --git a/include/linux/preempt.h b/include/linux/preempt.h index c01813c3fbe9..dd92b1a93919 100644 --- a/include/linux/preempt.h +++ b/include/linux/preempt.h @@ -53,9 +53,6 @@ #define SOFTIRQ_DISABLE_OFFSET (2 * SOFTIRQ_OFFSET) -/* We use the MSB mostly because its available */ -#define PREEMPT_NEED_RESCHED 0x80000000 - #define PREEMPT_DISABLED (PREEMPT_DISABLE_OFFSET + PREEMPT_ENABLED) /* -- 2.30.2