Yang Shi cf0a25436f arm64: replace read_lock to rcu lock in call_step_hook ... BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917 in_atomic(): 1, irqs_disabled(): 128, pid: 383, name: sh Preemption disabled at:[<ffff800000124c18>] kgdb_cpu_enter+0x158/0x6b8 CPU: 3 PID: 383 Comm: sh Tainted: G W 4.1.13-rt13 #2 Hardware name: Freescale Layerscape 2085a RDB Board (DT) Call trace: [<ffff8000000885e8>] dump_backtrace+0x0/0x128 [<ffff800000088734>] show_stack+0x24/0x30 [<ffff80000079a7c4>] dump_stack+0x80/0xa0 [<ffff8000000bd324>] ___might_sleep+0x18c/0x1a0 [<ffff8000007a20ac>] __rt_spin_lock+0x2c/0x40 [<ffff8000007a2268>] rt_read_lock+0x40/0x58 [<ffff800000085328>] single_step_handler+0x38/0xd8 [<ffff800000082368>] do_debug_exception+0x58/0xb8 Exception stack(0xffff80834a1e7c80 to 0xffff80834a1e7da0) 7c80: ffffff9c ffffffff 92c23ba0 0000ffff 4a1e7e40 ffff8083 001bfcc4 ffff8000 7ca0: f2000400 00000000 00000000 00000000 4a1e7d80 ffff8083 0049501c ffff8000 7cc0: 00005402 00000000 00aaa210 ffff8000 4a1e7ea0 ffff8083 000833f4 ffff8000 7ce0: ffffff9c ffffffff 92c23ba0 0000ffff 4a1e7ea0 ffff8083 001bfcc0 ffff8000 7d00: 4a0fc400 ffff8083 00005402 00000000 4a1e7d40 ffff8083 00490324 ffff8000 7d20: ffffff9c 00000000 92c23ba0 0000ffff 000a0000 00000000 00000000 00000000 7d40: 00000008 00000000 00080000 00000000 92c23b8b 0000ffff 92c23b8e 0000ffff 7d60: 00000038 00000000 00001cb2 00000000 00000005 00000000 92d7b498 0000ffff 7d80: 01010101 01010101 92be9000 0000ffff 00000000 00000000 00000030 00000000 [<ffff8000000833f4>] el1_dbg+0x18/0x6c This issue is similar with 62c6c61("arm64: replace read_lock to rcu lock in call_break_hook"), but comes to single_step_handler. This also solves kgdbts boot test silent hang issue on 4.4 -rt kernel. Signed-off-by: Yang Shi <yang.shi@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>		2016-02-16 15:40:45 +00:00
..
vdso	arm64: build vdso without libgcov	2015-11-12 15:18:07 +00:00
.gitignore
acpi_parking_protocol.c	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
acpi.c	Power management and ACPI updates for v4.4-rc1	2015-11-04 18:10:13 -08:00
alternative.c	arm64: mm: fold alternatives into .init	2015-12-10 17:36:08 +00:00
arm64ksyms.c	ARM: 8480/2: arm64: add implementation for arm-smccc	2016-01-04 16:24:45 +00:00
armv8_deprecated.c	arm64: add __init/__initdata section marker to some functions/variables	2015-12-02 12:17:11 +00:00
asm-offsets.c	* s390: Support for runtime instrumentation within guests,	2016-01-12 13:22:12 -08:00
cacheinfo.c
cpu_errata.c	arm64: prefetch: add alternative pattern for CPUs without a prefetcher	2016-02-16 15:12:32 +00:00
cpu_ops.c	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
cpufeature.c	arm64: prefetch: add alternative pattern for CPUs without a prefetcher	2016-02-16 15:12:32 +00:00
cpuidle.c
cpuinfo.c	arm64: restore bogomips information in /proc/cpuinfo	2015-11-19 17:57:18 +00:00
debug-monitors.c	arm64: replace read_lock to rcu lock in call_step_hook	2016-02-16 15:40:45 +00:00
efi-entry.S	arm64/efi: isolate EFI stub from the kernel proper	2015-10-12 16:20:12 +01:00
efi.c	arm64/efi: refactor EFI init and runtime code for reuse by 32-bit ARM	2015-12-09 16:57:23 +00:00
entry32.S
entry-fpsimd.S
entry-ftrace.S	arm64: ftrace: fix function_graph tracer panic	2015-10-02 11:12:56 +01:00
entry.S	arm64: entry: remove pointless SPSR mode check	2016-01-06 15:40:38 +00:00
fpsimd.c	arm64: add __init/__initdata section marker to some functions/variables	2015-12-02 12:17:11 +00:00
ftrace.c	arm64: ftrace: modify a stack frame in a safe way	2015-12-21 17:26:01 +00:00
head.S	arm64: mm: place empty_zero_page in bss	2016-02-16 15:10:44 +00:00
hw_breakpoint.c	arm64: Fix missing #include in hw_breakpoint.c	2015-10-12 12:10:53 +01:00
hyp-stub.S
image.h	arm64: hide __efistub_ aliases from kallsyms	2016-01-25 11:09:04 +00:00
insn.c	arm64: insn: remove BUG_ON from codegen	2016-01-17 19:15:26 -05:00
io.c
irq.c	arm64: remove irq_count and do_softirq_own_stack()	2015-12-21 17:26:01 +00:00
jump_label.c
kgdb.c
kuser32.S
Makefile	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
module.c	arm64: module: avoid undefined shift behavior in reloc_data()	2016-01-05 11:27:20 +00:00
paravirt.c	arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops	2015-12-21 14:40:54 +00:00
pci.c
perf_callchain.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
perf_event.c	arm64: perf: add support for Cortex-A72	2015-12-22 14:45:35 +00:00
perf_regs.c
process.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
psci.c	drivers: firmware: psci: move power_state handling to generic code	2015-10-02 14:35:16 +01:00
ptrace.c	arm64: Clear out any singlestep state on a ptrace detach operation	2015-12-07 17:48:21 +00:00
return_address.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
setup.c	arm64: unmap idmap earlier	2016-02-16 15:10:45 +00:00
signal32.c	arm64: compat: fix vfp save/restore across signal handlers in big-endian	2015-09-17 11:57:03 +01:00
signal.c
sleep.S	arm64: Store struct thread_info in sp_el0	2015-12-08 11:40:48 +00:00
smccc-call.S	ARM: 8480/2: arm64: add implementation for arm-smccc	2016-01-04 16:24:45 +00:00
smp_spin_table.c
smp.c	arm64: kernel: implement ACPI parking protocol	2016-02-16 15:12:32 +00:00
stacktrace.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
suspend.c	arm64: unify idmap removal	2016-02-16 15:10:44 +00:00
sys32.c
sys_compat.c
sys.c
time.c	arm64: ftrace: fix a stack tracer's output under function graph tracer	2015-12-21 17:26:02 +00:00
topology.c
trace-events-emulation.h
traps.c	arm64: traps: address fallout from printk -> pr_* conversion	2015-12-21 17:26:02 +00:00
vdso.c
vmlinux.lds.S	arm64: ensure _stext and _etext are page-aligned	2016-02-16 15:10:46 +00:00