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path: root/include/dt-bindings/clock/exynos5440.h
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/*
 * Copyright (c) 2013 Samsung Electronics Co., Ltd.
 * Author: Andrzej Hajda <a.hajda@samsung.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * Device Tree binding constants for Exynos5440 clock controller.
*/

#ifndef _DT_BINDINGS_CLOCK_EXYNOS_5440_H
#define _DT_BINDINGS_CLOCK_EXYNOS_5440_H

#define CLK_XTAL		1
#define CLK_ARM_CLK		2
#define CLK_CPLLA		3
#define CLK_CPLLB		4
#define CLK_SPI_BAUD		16
#define CLK_PB0_250		17
#define CLK_PR0_250		18
#define CLK_PR1_250		19
#define CLK_B_250		20
#define CLK_B_125		21
#define CLK_B_200		22
#define CLK_SATA		23
#define CLK_USB			24
#define CLK_GMAC0		25
#define CLK_CS250		26
#define CLK_PB0_250_O		27
#define CLK_PR0_250_O		28
#define CLK_PR1_250_O		29
#define CLK_B_250_O		30
#define CLK_B_125_O		31
#define CLK_B_200_O		32
#define CLK_SATA_O		33
#define CLK_USB_O		34
#define CLK_GMAC0_O		35
#define CLK_CS250_O		36

/* must be greater than maximal clock id */
#define CLK_NR_CLKS		37

#endif /* _DT_BINDINGS_CLOCK_EXYNOS_5440_H */
pu_ref_kill (blk_mq_freeze_queue_start) raced with percpu_ref_tryget (blk_mq_timeout_work). Sample stack trace: __switch_to+0x2c0/0x450 __schedule+0x2f8/0x970 schedule+0x48/0xc0 blk_mq_freeze_queue_wait+0x94/0x120 blk_mq_queue_reinit_work+0xb8/0x180 blk_mq_queue_reinit_prepare+0x84/0xa0 cpuhp_invoke_callback+0x17c/0x600 cpuhp_up_callbacks+0x58/0x150 _cpu_up+0xf0/0x1c0 do_cpu_up+0x120/0x150 cpu_subsys_online+0x64/0xe0 device_online+0xb4/0x120 online_store+0xb4/0xc0 dev_attr_store+0x68/0xa0 sysfs_kf_write+0x80/0xb0 kernfs_fop_write+0x17c/0x250 __vfs_write+0x6c/0x1e0 vfs_write+0xd0/0x270 SyS_write+0x6c/0x110 system_call+0x38/0xe0 Examination of the queue showed a single reference (no PERCPU_COUNT_BIAS, and __PERCPU_REF_DEAD, __PERCPU_REF_ATOMIC set) and no requests. However, conditions at the time of the race are count of PERCPU_COUNT_BIAS + 0 and __PERCPU_REF_DEAD and __PERCPU_REF_ATOMIC set. The fix is to make the tryget routines use an actual boolean internally instead of the atomic long result truncated to a int. Fixes: e625305b3907 percpu-refcount: make percpu_ref based on longs instead of ints Link: https://bugzilla.kernel.org/show_bug.cgi?id=190751 Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Fixes: e625305b3907 ("percpu-refcount: make percpu_ref based on longs instead of ints") Cc: stable@vger.kernel.org # v3.18+
Diffstat (limited to 'include/xen/xen.h')