Kefeng Wang e9b7b1c0c1 sample-trace-array: Fix sleeping function called from invalid context ... BUG: sleeping function called from invalid context at kernel/locking/mutex.c:935 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 0, name: swapper/5 1 lock held by swapper/5/0: #0: ffff80001002bd90 (samples/ftrace/sample-trace-array.c:38){+.-.}-{0:0}, at: call_timer_fn+0x8/0x3e0 CPU: 5 PID: 0 Comm: swapper/5 Not tainted 5.7.0+ #8 Hardware name: QEMU QEMU Virtual Machine, BIOS 0.0.0 02/06/2015 Call trace: dump_backtrace+0x0/0x1a0 show_stack+0x20/0x30 dump_stack+0xe4/0x150 ___might_sleep+0x160/0x200 __might_sleep+0x58/0x90 __mutex_lock+0x64/0x948 mutex_lock_nested+0x3c/0x58 __ftrace_set_clr_event+0x44/0x88 trace_array_set_clr_event+0x24/0x38 mytimer_handler+0x34/0x40 [sample_trace_array] mutex_lock() will be called in interrupt context, using workqueue to fix it. Link: https://lkml.kernel.org/r/20200610011244.2209486-1-wangkefeng.wang@huawei.com Cc: stable@vger.kernel.org Fixes: 89ed42495e ("tracing: Sample module to demonstrate kernel access to Ftrace instances.") Reviewed-by: Divya Indi <divya.indi@oracle.com> Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2020-06-16 21:21:02 -04:00
..
auxdisplay	samples: auxdisplay: use 'userprogs' syntax	2020-05-17 18:52:02 +09:00
binderfs	binderfs: add gitignore for generated sample program	2020-06-13 13:41:24 -07:00
bpf	samples, bpf: Refactor kprobe, tail call kern progs map definition	2020-05-19 17:13:03 +02:00
configfs	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 145	2019-05-30 11:25:18 -07:00
connector	samples: connector: build sample program for target architecture	2020-05-17 18:52:01 +09:00
ftrace	sample-trace-array: Fix sleeping function called from invalid context	2020-06-16 21:21:02 -04:00
hidraw	samples: hidraw: build sample program for target architecture	2020-05-17 18:52:01 +09:00
hw_breakpoint	samples/hw_breakpoint: drop use of kallsyms_lookup_name()	2020-04-07 10:43:44 -07:00
kdb	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
kfifo	proc: convert everything to "struct proc_ops"	2020-02-04 03:05:26 +00:00
kobject	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
kprobes	samples/kprobes: Add __kprobes and NOKPROBE_SYMBOL() for handlers.	2020-05-12 17:15:33 +02:00
livepatch	livepatch: Handle allocation failure in the sample of shadow variable API	2020-01-17 11:12:06 +01:00
mei	samples: mei: build sample program for target architecture	2020-05-17 18:52:02 +09:00
mic/mpssd	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
pidfd	samples: pidfd: build sample program for target architecture	2020-05-17 18:52:02 +09:00
pktgen	docs: networking: convert pktgen.txt to ReST	2020-04-30 12:56:37 -07:00
qmi	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
rpmsg	samples/rpmsg: Introduce a module parameter for message count	2019-08-26 22:10:39 -07:00
seccomp	samples: seccomp: build sample programs for target architecture	2020-05-17 18:52:01 +09:00
timers	samples: timers: use 'userprogs' syntax	2020-05-17 18:52:02 +09:00
trace_events	tracing: Fix doc mistakes in trace sample	2020-05-07 13:32:57 -04:00
trace_printk	samples/trace_printk: Wait for IRQ work to finish	2019-12-21 16:08:22 -05:00
uhid	samples: uhid: build sample program for target architecture	2020-05-17 18:52:01 +09:00
v4l	media: rename VFL_TYPE_GRABBER to _VIDEO	2020-02-24 16:52:39 +01:00
vfio-mdev	vmalloc: fix remap_vmalloc_range() bounds checks	2020-04-21 11:11:56 -07:00
vfs	Kbuild updates for v5.8	2020-06-06 12:00:25 -07:00
watch_queue	watch_queue: add gitignore for generated sample program	2020-06-13 13:00:54 -07:00
watchdog	samples: watchdog: use 'userprogs' syntax	2020-05-17 18:52:02 +09:00
Kconfig	Kbuild updates for v5.8 (2nd)	2020-06-13 13:29:16 -07:00
Makefile	Kbuild updates for v5.8 (2nd)	2020-06-13 13:29:16 -07:00