The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From adeaa21a4b6954e878f3f7d1c5659ed9c1fe567a Mon Sep 17 00:00:00 2001
From: Anisse Astier <aastier@xxxxxxxxxx>
Date: Mon, 17 Jun 2019 15:22:21 +0200
Subject: [PATCH] arm64: ssbd: explicitly depend on <linux/prctl.h>
Fix ssbd.c which depends implicitly on asm/ptrace.h including
linux/prctl.h (through for example linux/compat.h, then linux/time.h,
linux/seqlock.h, linux/spinlock.h and linux/irqflags.h), and uses
PR_SPEC* defines.
This is an issue since we'll soon be removing the include from
asm/ptrace.h.
Fixes: 9cdc0108baa8 ("arm64: ssbd: Add prctl interface for per-thread mitigation")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Anisse Astier <aastier@xxxxxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
diff --git a/arch/arm64/kernel/ssbd.c b/arch/arm64/kernel/ssbd.c
index 885f13e58708..52cfc6148355 100644
--- a/arch/arm64/kernel/ssbd.c
+++ b/arch/arm64/kernel/ssbd.c
@@ -5,6 +5,7 @@
#include <linux/compat.h>
#include <linux/errno.h>
+#include <linux/prctl.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <linux/thread_info.h>
