/* * Glibc independent futex library for testing kernel functionality. * Shamelessly stolen from Darren Hart * http://git.kernel.org/cgit/linux/kernel/git/dvhart/futextest.git/ */ #ifndef _FUTEX_H #define _FUTEX_H #include #include #include #include #include /** * futex() - SYS_futex syscall wrapper * @uaddr: address of first futex * @op: futex op code * @val: typically expected value of uaddr, but varies by op * @timeout: typically an absolute struct timespec (except where noted * otherwise). Overloaded by some ops * @uaddr2: address of second futex for some ops\ * @val3: varies by op * @opflags: flags to be bitwise OR'd with op, such as FUTEX_PRIVATE_FLAG * * futex() is used by all the following futex op wrappers. It can also be * used for misuse and abuse testing. Generally, the specific op wrappers * should be used instead. It is a macro instead of an static inline function as * some of the types over overloaded (timeout is used for nr_requeue for * example). * * These argument descriptions are the defaults for all * like-named arguments in the following wrappers except where noted below. */ #define futex(uaddr, op, val, timeout, uaddr2, val3, opflags) \ syscall(SYS_futex, uaddr, op | opflags, val, timeout, uaddr2, val3) /** * futex_wait() - block on uaddr with optional timeout * @timeout: relative timeout */ static inline int futex_wait(u_int32_t *uaddr, u_int32_t val, struct timespec *timeout, int opflags) { return futex(uaddr, FUTEX_WAIT, val, timeout, NULL, 0, opflags); } /** * futex_wake() - wake one or more tasks blocked on uaddr * @nr_wake: wake up to this many tasks */ static inline int futex_wake(u_int32_t *uaddr, int nr_wake, int opflags) { return futex(uaddr, FUTEX_WAKE, nr_wake, NULL, NULL, 0, opflags); } /** * futex_lock_pi() - block on uaddr as a PI mutex */ static inline int futex_lock_pi(u_int32_t *uaddr, struct timespec *timeout, int opflags) { return futex(uaddr, FUTEX_LOCK_PI, 0, timeout, NULL, 0, opflags); } /** * futex_unlock_pi() - release uaddr as a PI mutex, waking the top waiter */ static inline int futex_unlock_pi(u_int32_t *uaddr, int opflags) { return futex(uaddr, FUTEX_UNLOCK_PI, 0, NULL, NULL, 0, opflags); } /** * futex_cmp_requeue() - requeue tasks from uaddr to uaddr2 * @nr_wake: wake up to this many tasks * @nr_requeue: requeue up to this many tasks */ static inline int futex_cmp_requeue(u_int32_t *uaddr, u_int32_t val, u_int32_t *uaddr2, int nr_wake, int nr_requeue, int opflags) { return futex(uaddr, FUTEX_CMP_REQUEUE, nr_wake, nr_requeue, uaddr2, val, opflags); } #ifndef HAVE_PTHREAD_ATTR_SETAFFINITY_NP #include static inline int pthread_attr_setaffinity_np(pthread_attr_t *attr, size_t cpusetsize, cpu_set_t *cpuset) { attr = attr; cpusetsize = cpusetsize; cpuset = cpuset; return 0; } #endif /* User input sanitation */ #define futexbench_sanitize_numeric(__n) abs((__n)) #endif /* _FUTEX_H */ e0a94d9ad8b3ce2d0'>net/tipc/netlink.h
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authorDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-12 17:15:56 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2017-01-30 10:17:32 +0100
commite6e7b48b295afa5a5ab440de0a94d9ad8b3ce2d0 (patch)
tree77cadb6d8aad1b52c34e4afa8c9deef603bbe2ed /net/tipc/netlink.h
parent4e5b54f127426c82dc2816340c26d951a5bb3429 (diff)
drm: Don't race connector registration
I was under the misconception that the sysfs dev stuff can be fully set up, and then registered all in one step with device_add. That's true for properties and property groups, but not for parents and child devices. Those must be fully registered before you can register a child. Add a bit of tracking to make sure that asynchronous mst connector hotplugging gets this right. For consistency we rely upon the implicit barriers of the connector->mutex, which is taken anyway, to ensure that at least either the connector or device registration call will work out. Mildly tested since I can't reliably reproduce this on my mst box here. Reported-by: Dave Hansen <dave.hansen@intel.com> Cc: Dave Hansen <dave.hansen@intel.com> Acked-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/1484237756-2720-1-git-send-email-daniel.vetter@ffwll.ch
Diffstat (limited to 'net/tipc/netlink.h')