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| author |   Will Deacon <will.deacon@arm.com> | 2018-09-19 13:39:26 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-12-07 12:35:46 +0000 |
| commit | 08861d33d680838753f1f9d3ba9480d3651b764d (patch) | |
| tree | d4adfa8fdb8410eabebe2e9ba273134653a178a4 /arch/x86 | |
| parent | arm64: hugetlb: Register hugepages during arch init (diff) | |
| download | linux-dev-08861d33d680838753f1f9d3ba9480d3651b764d.tar.xz linux-dev-08861d33d680838753f1f9d3ba9480d3651b764d.zip | |
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 <rml@tech9.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/preempt.h | 3 |
1 files changed, 3 insertions, 0 deletions
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. |