diff options
| author | Yang Shi <yang.shi@linaro.org> | 2015-12-10 10:58:51 -0800 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-12-23 17:13:54 +0100 |
| commit | 0b717e34bab626a965425a4f284e6b09896582e4 (patch) | |
| tree | 3040bf4654e31000a0477530dd8f661a86214a68 /arch/x86/include/asm/signal.h | |
| parent | 0c51dc51b8129f75d786ee9cee9879c87937b4d0 (diff) | |
| download | linux-rt-0b717e34bab626a965425a4f284e6b09896582e4.tar.gz | |
x86/signal: delay calling signals on 32bit
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>
Diffstat (limited to 'arch/x86/include/asm/signal.h')
| -rw-r--r-- | arch/x86/include/asm/signal.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/signal.h b/arch/x86/include/asm/signal.h index c370fba8c38b..d1328789b759 100644 --- a/arch/x86/include/asm/signal.h +++ b/arch/x86/include/asm/signal.h @@ -36,7 +36,7 @@ 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 |