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| author |   Yang Shi <yang.shi@linaro.org> | 2019-02-13 17:14:23 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@armlinux.org.uk> | 2019-02-26 11:24:50 +0000 |
| commit | 143c2a89e0e5fda6c6fd08d7bc1126438c19ae90 (patch) | |
| tree | 81172557d2a330840f8c97d87333f5eb770a1481 /arch/arm/include/asm/suspend.h | |
| parent | ARM: 8835/1: dma-mapping: Clear DMA ops on teardown (diff) | |
| download | linux-dev-143c2a89e0e5fda6c6fd08d7bc1126438c19ae90.tar.xz linux-dev-143c2a89e0e5fda6c6fd08d7bc1126438c19ae90.zip | |
ARM: 8839/1: kprobe: make patch_lock a raw_spinlock_t
When running kprobe on -rt kernel, the below bug is caught:
|BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:931
|in_atomic(): 1, irqs_disabled(): 128, pid: 14, name: migration/0
|Preemption disabled at:[<802f2b98>] cpu_stopper_thread+0xc0/0x140
|CPU: 0 PID: 14 Comm: migration/0 Tainted: G O 4.8.3-rt2 #1
|Hardware name: Freescale LS1021A
|[<8025a43c>] (___might_sleep)
|[<80b5b324>] (rt_spin_lock)
|[<80b5c31c>] (__patch_text_real)
|[<80b5c3ac>] (patch_text_stop_machine)
|[<802f2920>] (multi_cpu_stop)
Since patch_text_stop_machine() is called in stop_machine() which
disables IRQ, sleepable lock should be not used in this atomic context,
so replace patch_lock to raw lock.
Signed-off-by: Yang Shi <yang.shi@linaro.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'arch/arm/include/asm/suspend.h')
0 files changed, 0 insertions, 0 deletions