/* * This header provides constants for the STM32F4 RCC IP */ #ifndef _DT_BINDINGS_MFD_STM32F4_RCC_H #define _DT_BINDINGS_MFD_STM32F4_RCC_H /* AHB1 */ #define STM32F4_RCC_AHB1_GPIOA 0 #define STM32F4_RCC_AHB1_GPIOB 1 #define STM32F4_RCC_AHB1_GPIOC 2 #define STM32F4_RCC_AHB1_GPIOD 3 #define STM32F4_RCC_AHB1_GPIOE 4 #define STM32F4_RCC_AHB1_GPIOF 5 #define STM32F4_RCC_AHB1_GPIOG 6 #define STM32F4_RCC_AHB1_GPIOH 7 #define STM32F4_RCC_AHB1_GPIOI 8 #define STM32F4_RCC_AHB1_GPIOJ 9 #define STM32F4_RCC_AHB1_GPIOK 10 #define STM32F4_RCC_AHB1_CRC 12 #define STM32F4_RCC_AHB1_DMA1 21 #define STM32F4_RCC_AHB1_DMA2 22 #define STM32F4_RCC_AHB1_DMA2D 23 #define STM32F4_RCC_AHB1_ETHMAC 25 #define STM32F4_RCC_AHB1_OTGHS 29 #define STM32F4_AHB1_RESET(bit) (STM32F4_RCC_AHB1_##bit + (0x10 * 8)) #define STM32F4_AHB1_CLOCK(bit) (STM32F4_RCC_AHB1_##bit + (0x30 * 8)) /* AHB2 */ #define STM32F4_RCC_AHB2_DCMI 0 #define STM32F4_RCC_AHB2_CRYP 4 #define STM32F4_RCC_AHB2_HASH 5 #define STM32F4_RCC_AHB2_RNG 6 #define STM32F4_RCC_AHB2_OTGFS 7 #define STM32F4_AHB2_RESET(bit) (STM32F4_RCC_AHB2_##bit + (0x14 * 8)) #define STM32F4_AHB2_CLOCK(bit) (STM32F4_RCC_AHB2_##bit + (0x34 * 8)) /* AHB3 */ #define STM32F4_RCC_AHB3_FMC 0 #define STM32F4_AHB3_RESET(bit) (STM32F4_RCC_AHB3_##bit + (0x18 * 8)) #define STM32F4_AHB3_CLOCK(bit) (STM32F4_RCC_AHB3_##bit + (0x38 * 8)) /* APB1 */ #define STM32F4_RCC_APB1_TIM2 0 #define STM32F4_RCC_APB1_TIM3 1 #define STM32F4_RCC_APB1_TIM4 2 #define STM32F4_RCC_APB1_TIM5 3 #define STM32F4_RCC_APB1_TIM6 4 #define STM32F4_RCC_APB1_TIM7 5 #define STM32F4_RCC_APB1_TIM12 6 #define STM32F4_RCC_APB1_TIM13 7 #define STM32F4_RCC_APB1_TIM14 8 #define STM32F4_RCC_APB1_WWDG 11 #define STM32F4_RCC_APB1_SPI2 14 #define STM32F4_RCC_APB1_SPI3 15 #define STM32F4_RCC_APB1_UART2 17 #define STM32F4_RCC_APB1_UART3 18 #define STM32F4_RCC_APB1_UART4 19 #define STM32F4_RCC_APB1_UART5 20 #define STM32F4_RCC_APB1_I2C1 21 #define STM32F4_RCC_APB1_I2C2 22 #define STM32F4_RCC_APB1_I2C3 23 #define STM32F4_RCC_APB1_CAN1 25 #define STM32F4_RCC_APB1_CAN2 26 #define STM32F4_RCC_APB1_PWR 28 #define STM32F4_RCC_APB1_DAC 29 #define STM32F4_RCC_APB1_UART7 30 #define STM32F4_RCC_APB1_UART8 31 #define STM32F4_APB1_RESET(bit) (STM32F4_RCC_APB1_##bit + (0x20 * 8)) #define STM32F4_APB1_CLOCK(bit) (STM32F4_RCC_APB1_##bit + (0x40 * 8)) /* APB2 */ #define STM32F4_RCC_APB2_TIM1 0 #define STM32F4_RCC_APB2_TIM8 1 #define STM32F4_RCC_APB2_USART1 4 #define STM32F4_RCC_APB2_USART6 5 #define STM32F4_RCC_APB2_ADC 8 #define STM32F4_RCC_APB2_SDIO 11 #define STM32F4_RCC_APB2_SPI1 12 #define STM32F4_RCC_APB2_SPI4 13 #define STM32F4_RCC_APB2_SYSCFG 14 #define STM32F4_RCC_APB2_TIM9 16 #define STM32F4_RCC_APB2_TIM10 17 #define STM32F4_RCC_APB2_TIM11 18 #define STM32F4_RCC_APB2_SPI5 20 #define STM32F4_RCC_APB2_SPI6 21 #define STM32F4_RCC_APB2_SAI1 22 #define STM32F4_RCC_APB2_LTDC 26 #define STM32F4_APB2_RESET(bit) (STM32F4_RCC_APB2_##bit + (0x24 * 8)) #define STM32F4_APB2_CLOCK(bit) (STM32F4_RCC_APB2_##bit + (0x44 * 8)) #endif /* _DT_BINDINGS_MFD_STM32F4_RCC_H */ net-next.git/commit/include/net/inet6_hashtables.h?id=966d2b04e070bc040319aaebfec09e0144dc3341'>inet6_hashtables.h
diff options
context:
space:
mode:
authorDouglas Miller <dougmill@linux.vnet.ibm.com>2017-01-28 06:42:20 -0600
committerTejun Heo <tj@kernel.org>2017-01-28 07:49:42 -0500
commit966d2b04e070bc040319aaebfec09e0144dc3341 (patch)
tree4b96156e3d1dd4dfd6039b7c219c9dc4616da52d /include/net/inet6_hashtables.h
parent1b1bc42c1692e9b62756323c675a44cb1a1f9dbd (diff)
percpu-refcount: fix reference leak during percpu-atomic transition
percpu_ref_tryget() and percpu_ref_tryget_live() should return "true" IFF they acquire a reference. But the return value from atomic_long_inc_not_zero() is a long and may have high bits set, e.g. PERCPU_COUNT_BIAS, and the return value of the tryget routines is bool so the reference may actually be acquired but the routines return "false" which results in a reference leak since the caller assumes it does not need to do a corresponding percpu_ref_put(). This was seen when performing CPU hotplug during I/O, as hangs in blk_mq_freeze_queue_wait where percpu_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/net/inet6_hashtables.h')