litmus-rt-ext-res.git - LITMUS^RT with extended reservations for Forbidden Zones paper @ RTAS'20

diff options

author	Richard Genoud <richard.genoud@gmail.com>	2018-11-27 11:06:35 -0500
committer	Vinod Koul <vkoul@kernel.org>	2018-11-29 09:19:41 -0500
commit	77e75fda94d2ebb86aa9d35fb1860f6395bf95de (patch)
tree	156e1330cf21567a8951fc23417f7656ded15429 /tools/perf/scripts/python/bin/export-to-sqlite-report
parent	98f5f932254b88ce828bc8e4d1642d14e5854caa (diff)

dmaengine: at_hdmac: fix module unloading

of_dma_controller_free() was not called on module onloading. This lead to a soft lockup: watchdog: BUG: soft lockup - CPU#0 stuck for 23s! Modules linked in: at_hdmac [last unloaded: at_hdmac] when of_dma_request_slave_channel() tried to call ofdma->of_dma_xlate(). Cc: stable@vger.kernel.org Fixes: bbe89c8e3d59 ("at_hdmac: move to generic DMA binding") Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>

Diffstat (limited to 'tools/perf/scripts/python/bin/export-to-sqlite-report')

0 files changed, 0 insertions, 0 deletions

/* * linux/kernel/posix-timers.c * * * 2002-10-15 Posix Clocks & timers * by George Anzinger george@mvista.com * * Copyright (C) 2002 2003 by MontaVista Software. * * 2004-06-01 Fix CLOCK_REALTIME clock/timer TIMER_ABSTIME bug. * Copyright (C) 2004 Boris Hu * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. * * MontaVista Software | 1237 East Arques Avenue | Sunnyvale | CA 94085 | USA */ /* These are all the functions necessary to implement * POSIX clocks & timers */ #include <linux/mm.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/time.h> #include <linux/mutex.h> #include <asm/uaccess.h> #include <linux/list.h> #include <linux/init.h> #include <linux/compiler.h> #include <linux/idr.h> #include <linux/posix-timers.h> #include <linux/syscalls.h> #include <linux/wait.h> #include <linux/workqueue.h> #include <linux/module.h> /* * Management arrays for POSIX timers. Timers are kept in slab memory * Timer ids are allocated by an external routine that keeps track of the * id and the timer. The external interface is: * * void *idr_find(struct idr *idp, int id); to find timer_id <id> * int idr_get_new(struct idr *idp, void *ptr); to get a new id and * related it to <ptr> * void idr_remove(struct idr *idp, int id); to release <id> * void idr_init(struct idr *idp); to initialize <idp> * which we supply. * The idr_get_new *may* call slab for more memory so it must not be * called under a spin lock. Likewise idr_remore may release memory * (but it may be ok to do this under a lock...). * idr_find is just a memory look up and is quite fast. A -1 return * indicates that the requested id does not exist. */ /* * Lets keep our timers in a slab cache :-) */ static struct kmem_cache *posix_timers_cache; static struct idr posix_timers_id; static DEFINE_SPINLOCK(idr_lock); /* * we assume that the new SIGEV_THREAD_ID shares no bits with the other * SIGEV values. Here we put out an error if this assumption fails. */ #if SIGEV_THREAD_ID != (SIGEV_THREAD_ID & \ ~(SIGEV_SIGNAL | SIGEV_NONE | SIGEV_THREAD)) #error "SIGEV_THREAD_ID must not share bit with other SIGEV values!" #endif /* * The timer ID is turned into a timer address by idr_find(). * Verifying a valid ID consists of: * * a) checking that idr_find() returns other than -1. * b) checking that the timer id matches the one in the timer itself. * c) that the timer owner is in the callers thread group. */ /* * CLOCKs: The POSIX standard calls for a couple of clocks and allows us * to implement others. This structure defines the various * clocks and allows the possibility of adding others. We * provide an interface to add clocks to the table and expect * the "arch" code to add at least one clock that is high * resolution. Here we define the standard CLOCK_REALTIME as a * 1/HZ resolution clock. * * RESOLUTION: Clock resolution is used to round up timer and interval * times, NOT to report clock times, which are reported with as * much resolution as the system can muster. In some cases this * resolution may depend on the underlying clock hardware and * may not be quantifiable until run time, and only then is the * necessary code is written. The standard says we should say * something about this issue in the documentation... * * FUNCTIONS: The CLOCKs structure defines possible functions to handle * various clock functions. For clocks that use the standard * system timer code these entries should be NULL. This will * allow dispatch without the overhead of indirect function * calls. CLOCKS that depend on other sources (e.g. WWV or GPS) * must supply functions here, even if the function just returns * ENOSYS. The standard POSIX timer management code assumes the * following: 1.) The k_itimer struct (sched.h) is used for the * timer. 2.) The list, it_lock, it_clock, it_id and it_pid * fields are not modified by timer code. * * At this time all functions EXCEPT clock_nanosleep can be * redirected by the CLOCKS structure. Clock_nanosleep is in * there, but the code ignores it. * * Permissions: It is assumed that the clock_settime() function defined * for each clock will take care of permission checks. Some * clocks may be set able by any user (i.e. local process * clocks) others not. Currently the only set able clock we * have is CLOCK_REALTIME and its high res counter part, both of * which we beg off on and pass to do_sys_settimeofday(). */ static struct k_clock posix_clocks[MAX_CLOCKS];


context:
space:
mode: