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#
# CAIF net configurations
#

menuconfig CAIF
	tristate "CAIF support"
	select CRC_CCITT
	default n
	---help---
	The "Communication CPU to Application CPU Interface" (CAIF) is a packet
	based connection-oriented MUX protocol developed by ST-Ericsson for use
	with its modems. It is accessed from user space as sockets (PF_CAIF).

	Say Y (or M) here if you build for a phone product (e.g. Android or
	MeeGo ) that uses CAIF as transport, if unsure say N.

	If you select to build it as module then CAIF_NETDEV also needs to be
	built as modules. You will also need to say yes to any CAIF physical
	devices that your platform requires.

	See Documentation/networking/caif for a further explanation on how to
	use and configure CAIF.

config  CAIF_DEBUG
	bool "Enable Debug"
	depends on CAIF
	default n
	---help---
	Enable the inclusion of debug code in the CAIF stack.
	Be aware that doing this will impact performance.
	If unsure say N.

config CAIF_NETDEV
	tristate "CAIF GPRS Network device"
	depends on CAIF
	default CAIF
	---help---
	Say Y if you will be using a CAIF based GPRS network device.
	This can be either built-in or a loadable module,
	If you select to build it as a built-in then the main CAIF device must
	also be a built-in.
	If unsure say Y.

config CAIF_USB
	tristate "CAIF USB support"
	depends on CAIF
	default n
	---help---
	Say Y if you are using CAIF over USB CDC NCM.
	This can be either built-in or a loadable module,
	If you select to build it as a built-in then the main CAIF device must
	also be a built-in.
	If unsure say N.
repare+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 'net/ipv4/tcp_input.c')