From: Jisheng Zhang <[email protected]> riscv has switched to GENERIC_ENTRY, so adding PREEMPT_LAZY is as simple as adding TIF_NEED_RESCHED_LAZY related definitions and enabling ARCH_HAS_PREEMPT_LAZY.
[bigeasy: Replace old PREEMPT_AUTO bits with new PREEMPT_LAZY ] Cc: Paul Walmsley <[email protected]> Cc: Palmer Dabbelt <[email protected]> Cc: Albert Ou <[email protected]> Cc: [email protected] Signed-off-by: Jisheng Zhang <[email protected]> Signed-off-by: Sebastian Andrzej Siewior <[email protected]> --- arch/riscv/Kconfig | 1 + arch/riscv/include/asm/thread_info.h | 2 ++ 2 files changed, 3 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 62545946ecf43..3516c58480612 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -39,6 +39,7 @@ config RISCV select ARCH_HAS_MMIOWB select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE select ARCH_HAS_PMEM_API + select ARCH_HAS_PREEMPT_LAZY select ARCH_HAS_PREPARE_SYNC_CORE_CMD select ARCH_HAS_PTE_DEVMAP if 64BIT && MMU select ARCH_HAS_PTE_SPECIAL diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 9c10fb180f438..8b5a5ddea4293 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -107,6 +107,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); * - pending work-to-be-done flags are in lowest half-word * - other flags in upper half-word(s) */ +#define TIF_NEED_RESCHED_LAZY 0 /* Lazy rescheduling needed */ #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ #define TIF_SIGPENDING 2 /* signal pending */ #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ @@ -117,6 +118,7 @@ int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src); #define TIF_32BIT 11 /* compat-mode 32bit process */ #define TIF_RISCV_V_DEFER_RESTORE 12 /* restore Vector before returing to user */ +#define _TIF_NEED_RESCHED_LAZY (1 << TIF_NEED_RESCHED_LAZY) #define _TIF_NOTIFY_RESUME (1 << TIF_NOTIFY_RESUME) #define _TIF_SIGPENDING (1 << TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) -- 2.45.2
