Add the TIF_NEED_RESCHED_NODELAY bit and enable it in Kconfig
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Prakash Sangappa <prakash.sangappa@oracle.com>
---
arch/x86/Kconfig | 1 +
arch/x86/include/asm/thread_info.h | 2 ++
2 files changed, 3 insertions(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 71019b3b54ea..8925af10b9b5 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -101,6 +101,7 @@ config X86
select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
select ARCH_HAS_PMEM_API if X86_64
select ARCH_HAS_PREEMPT_LAZY
+ select ARCH_HAS_PREEMPT_NODELAY
select ARCH_HAS_PTE_DEVMAP if X86_64
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_HW_PTE_YOUNG
diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h
index 9282465eea21..00ef128cea9d 100644
--- a/arch/x86/include/asm/thread_info.h
+++ b/arch/x86/include/asm/thread_info.h
@@ -90,6 +90,7 @@ struct thread_info {
#define TIF_NEED_RESCHED_LAZY 4 /* Lazy rescheduling needed */
#define TIF_SINGLESTEP 5 /* reenable singlestep on user return*/
#define TIF_SSBD 6 /* Speculative store bypass disable */
+#define TIF_NEED_RESCHED_NODELAY 7 /* No delay rescheduling needed */
#define TIF_SPEC_IB 9 /* Indirect branch speculation mitigation */
#define TIF_SPEC_L1D_FLUSH 10 /* Flush L1D on mm switches (processes) */
#define TIF_USER_RETURN_NOTIFY 11 /* notify kernel of userspace return */
@@ -114,6 +115,7 @@ struct thread_info {
#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY)
#define _TIF_SINGLESTEP (1 << TIF_SINGLESTEP)
#define _TIF_SSBD (1 << TIF_SSBD)
+#define _TIF_NEED_RESCHED_NODELAY (1 << TIF_NEED_RESCHED_NODELAY)
#define _TIF_SPEC_IB (1 << TIF_SPEC_IB)
#define _TIF_SPEC_L1D_FLUSH (1 << TIF_SPEC_L1D_FLUSH)
#define _TIF_USER_RETURN_NOTIFY (1 << TIF_USER_RETURN_NOTIFY)
--
2.43.5