53 lines
2.0 KiB
Diff
53 lines
2.0 KiB
Diff
From 28030eba61e8c4a4dd506cb8066b0dc0c3936edd Mon Sep 17 00:00:00 2001
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Message-Id: <28030eba61e8c4a4dd506cb8066b0dc0c3936edd.1601675151.git.zanussi@kernel.org>
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In-Reply-To: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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References: <5b5a156f9808b1acf1205606e03da117214549ea.1601675151.git.zanussi@kernel.org>
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From: Yang Shi <yang.shi@linaro.org>
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Date: Thu, 10 Dec 2015 10:58:51 -0800
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Subject: [PATCH 065/333] x86/signal: delay calling signals on 32bit
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Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.148-rt64.tar.xz
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When running some ptrace single step tests on x86-32 machine, the below problem
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is triggered:
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BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
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in_atomic(): 1, irqs_disabled(): 0, pid: 1041, name: dummy2
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Preemption disabled at:[<c100326f>] do_debug+0x1f/0x1a0
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CPU: 10 PID: 1041 Comm: dummy2 Tainted: G W 4.1.13-rt13 #1
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Call Trace:
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[<c1aa8306>] dump_stack+0x46/0x5c
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[<c1080517>] ___might_sleep+0x137/0x220
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[<c1ab0eff>] rt_spin_lock+0x1f/0x80
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[<c1064b5a>] do_force_sig_info+0x2a/0xc0
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[<c106567d>] force_sig_info+0xd/0x10
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[<c1010cff>] send_sigtrap+0x6f/0x80
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[<c10033b1>] do_debug+0x161/0x1a0
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[<c1ab2921>] debug_stack_correct+0x2e/0x35
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This happens since 959274753857 ("x86, traps: Track entry into and exit
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from IST context") which was merged in v4.1-rc1.
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Signed-off-by: Yang Shi <yang.shi@linaro.org>
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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arch/x86/include/asm/signal.h | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h
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index fb0438d06ca7..c00e27af2205 100644
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--- a/arch/x86/include/asm/signal.h
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+++ b/arch/x86/include/asm/signal.h
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@@ -37,7 +37,7 @@ typedef struct {
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* TIF_NOTIFY_RESUME and set up the signal to be sent on exit of the
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* trap.
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*/
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-#if defined(CONFIG_PREEMPT_RT_FULL) && defined(CONFIG_X86_64)
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+#if defined(CONFIG_PREEMPT_RT_FULL)
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#define ARCH_RT_DELAYS_SIGNAL_SEND
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#endif
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--
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2.17.1
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