# # 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. et-next.git/'>summaryrefslogtreecommitdiff
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authorAndrei Vagin <avagin@openvz.org>2017-01-04 19:28:14 -0800
committerEric W. Biederman <ebiederm@xmission.com>2017-01-10 13:34:56 +1300
commitadd7c65ca426b7a37184dd3d2172394e23d585d6 (patch)
tree28b08b519540041b06ed0ab0b1c005076b932e8e /sound/arm
parent75422726b0f717d67db3283c2eb5bc14fa2619c5 (diff)
pid: fix lockdep deadlock warning due to ucount_lock
========================================================= [ INFO: possible irq lock inversion dependency detected ] 4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G W --------------------------------------------------------- swapper/1/0 just changed the state of lock: (&(&sighand->siglock)->rlock){-.....}, at: [<ffffffffbd0a1bc6>] __lock_task_sighand+0xb6/0x2c0 but this lock took another, HARDIRQ-unsafe lock in the past: (ucounts_lock){+.+...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&sighand->siglock)->rlock --> &(&tty->ctrl_lock)->rlock --> ucounts_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ucounts_lock); local_irq_disable(); lock(&(&sighand->siglock)->rlock); lock(&(&tty->ctrl_lock)->rlock); <Interrupt> lock(&(&sighand->siglock)->rlock); *** DEADLOCK *** This patch removes a dependency between rlock and ucount_lock. Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces") Cc: stable@vger.kernel.org Signed-off-by: Andrei Vagin <avagin@openvz.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'sound/arm')