1 files changed, 49 insertions, 0 deletions
diff --git a/debian/patches-rt/0065-x86-signal-delay-calling-signals-on-32bit.patch b/debian/patches-rt/0065-x86-signal-delay-calling-signals-on-32bit.patch
new file mode 100644
index 000000000..d03ec8bc1
--- /dev/null
+++ b/debian/patches-rt/0065-x86-signal-delay-calling-signals-on-32bit.patch
@@ -0,0 +1,49 @@
+From b2265189b45c7240033cc856851c5bbf4c2dc323 Mon Sep 17 00:00:00 2001
+From: Yang Shi <yang.shi@linaro.org>
+Date: Thu, 10 Dec 2015 10:58:51 -0800
+Subject: [PATCH 065/347] x86/signal: delay calling signals on 32bit
+Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.246-rt110.tar.xz
+
+When running some ptrace single step tests on x86-32 machine, the below problem
+is triggered:
+
+BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
+in_atomic(): 1, irqs_disabled(): 0, pid: 1041, name: dummy2
+Preemption disabled at:[<c100326f>] do_debug+0x1f/0x1a0
+
+CPU: 10 PID: 1041 Comm: dummy2 Tainted: G        W       4.1.13-rt13 #1
+Call Trace:
+ [<c1aa8306>] dump_stack+0x46/0x5c
+ [<c1080517>] ___might_sleep+0x137/0x220
+ [<c1ab0eff>] rt_spin_lock+0x1f/0x80
+ [<c1064b5a>] do_force_sig_info+0x2a/0xc0
+ [<c106567d>] force_sig_info+0xd/0x10
+ [<c1010cff>] send_sigtrap+0x6f/0x80
+ [<c10033b1>] do_debug+0x161/0x1a0
+ [<c1ab2921>] debug_stack_correct+0x2e/0x35
+
+This happens since 959274753857 ("x86, traps: Track entry into and exit
+from IST context") which was merged in v4.1-rc1.
+
+Signed-off-by: Yang Shi <yang.shi@linaro.org>
+Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
+---
+ arch/x86/include/asm/signal.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
+index fb0438d06ca7..c00e27af2205 100644
+--- a/arch/x86/include/asm/signal.h
++++ b/arch/x86/include/asm/signal.h
+@@ -37,7 +37,7 @@ typedef struct {
+  * TIF_NOTIFY_RESUME and set up the signal to be sent on exit of the
+  * trap.
+  */
+-#if defined(CONFIG_PREEMPT_RT_FULL) && defined(CONFIG_X86_64)
++#if defined(CONFIG_PREEMPT_RT_FULL)
+ #define ARCH_RT_DELAYS_SIGNAL_SEND
+ #endif
+ 
+-- 
+2.36.1
+