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Diffstat (limited to '')
| -rw-r--r-- | debian/patches-rt/riscv-add-PREEMPT_AUTO-support.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/debian/patches-rt/riscv-add-PREEMPT_AUTO-support.patch b/debian/patches-rt/riscv-add-PREEMPT_AUTO-support.patch new file mode 100644 index 000000000..60c3bf3aa --- /dev/null +++ b/debian/patches-rt/riscv-add-PREEMPT_AUTO-support.patch @@ -0,0 +1,44 @@ +From: Jisheng Zhang <jszhang@kernel.org> +Date: Tue, 31 Oct 2023 22:35:20 +0800 +Subject: [PATCH] riscv: add PREEMPT_AUTO support +Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/6.6/older/patches-6.6.7-rt18.tar.xz + +riscv has switched to GENERIC_ENTRY, so adding PREEMPT_AUTO is as simple +as adding TIF_ARCH_RESCHED_LAZY related definitions and enabling +HAVE_PREEMPT_AUTO. + +Signed-off-by: Jisheng Zhang <jszhang@kernel.org> +Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> +--- + arch/riscv/Kconfig | 1 + + arch/riscv/include/asm/thread_info.h | 2 ++ + 2 files changed, 3 insertions(+) + +--- a/arch/riscv/Kconfig ++++ b/arch/riscv/Kconfig +@@ -135,6 +135,7 @@ config RISCV + select HAVE_PERF_USER_STACK_DUMP + select HAVE_POSIX_CPU_TIMERS_TASK_WORK + select HAVE_PREEMPT_DYNAMIC_KEY if !XIP_KERNEL ++ select HAVE_PREEMPT_AUTO + select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RETHOOK if !XIP_KERNEL + select HAVE_RSEQ +--- a/arch/riscv/include/asm/thread_info.h ++++ b/arch/riscv/include/asm/thread_info.h +@@ -82,6 +82,7 @@ int arch_dup_task_struct(struct task_str + * - pending work-to-be-done flags are in lowest half-word + * - other flags in upper half-word(s) + */ ++#define TIF_ARCH_RESCHED_LAZY 0 /* Lazy rescheduling */ + #define TIF_NOTIFY_RESUME 1 /* callback before returning to user */ + #define TIF_SIGPENDING 2 /* signal pending */ + #define TIF_NEED_RESCHED 3 /* rescheduling necessary */ +@@ -96,6 +97,7 @@ int arch_dup_task_struct(struct task_str + #define _TIF_NEED_RESCHED (1 << TIF_NEED_RESCHED) + #define _TIF_NOTIFY_SIGNAL (1 << TIF_NOTIFY_SIGNAL) + #define _TIF_UPROBE (1 << TIF_UPROBE) ++#define _TIF_ARCH_RESCHED_LAZY (1 << TIF_ARCH_RESCHED_LAZY) + + #define _TIF_WORK_MASK \ + (_TIF_NOTIFY_RESUME | _TIF_SIGPENDING | _TIF_NEED_RESCHED | \ |