[RFC 10/10] arm64: Enable reclaimable stacks
From: David Stevens <hidden>
Date: 2026-08-27 23:32:13
Also in:
linux-mm, linux-rt-devel, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Implement top_of_blocked_task_stack() to get the stack pointer out of a thread_struct and enable HAVE_ARCH_RECLAIMABLE_STACK. Signed-off-by: David Stevens <redacted> --- arch/arm64/Kconfig | 1 + arch/arm64/include/asm/processor.h | 5 +++++ 2 files changed, 6 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b3afe0688919..262a4fddce19 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig@@ -173,6 +173,7 @@ config ARM64 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_VMAP_STACK + select HAVE_ARCH_RECLAIMABLE_STACK select HAVE_ARM_SMCCC select HAVE_ASM_MODVERSIONS select HAVE_EBPF_JIT
diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/processor.h
index c2a627f39314..f5a550835c94 100644
--- a/arch/arm64/include/asm/processor.h
+++ b/arch/arm64/include/asm/processor.h@@ -204,6 +204,11 @@ struct thread_struct { #endif }; +static inline unsigned long top_of_blocked_task_stack(struct thread_struct *thread) +{ + return thread->cpu_context.sp; +} + static inline unsigned int thread_get_vl(struct thread_struct *thread, enum vec_type type) {
--
2.55.0.897.gb25b4bd76c-goog