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
..
boot	ARM: SoC fixes for v4.5-rc	2016-02-07 15:23:20 -08:00
configs	arm64: defconfig: updates for 4.5	2016-01-26 11:24:41 +00:00
crypto	arm64: crypto: reduce priority of core AES cipher	2015-11-18 12:09:08 +00:00
include	arm64: prefetch: add missing #include for spin_lock_prefetch	2016-02-16 15:12:34 +00:00
kernel	arm64: replace read_lock to rcu lock in call_step_hook	2016-02-16 15:40:45 +00:00
kvm	arm64: KVM: Fix guest dead loop when register accessor returns false	2016-01-24 21:56:01 +00:00
lib	arm64: lib: patch in prfm for copy_page if requested	2016-02-16 15:12:33 +00:00
mm	arm64: ptdump: Indicate whether memory should be faulting	2016-02-16 15:40:44 +00:00
net	arm64: bpf: add extra pass to handle faulty codegen	2016-01-17 19:15:26 -05:00
xen	xen/arm: introduce HYPERVISOR_platform_op on arm and arm64	2015-12-21 14:40:56 +00:00
Kconfig	arm64: Add support for ARCH_SUPPORTS_DEBUG_PAGEALLOC	2016-02-16 15:40:30 +00:00
Kconfig.debug	arch: consolidate CONFIG_STRICT_DEVM in lib/Kconfig.debug	2016-01-09 06:30:49 -08:00
Kconfig.platforms	ARM: SoC support for Tegra platforms for v4.5	2016-01-22 17:30:52 -08:00
Makefile	arm64: errata: Add -mpc-relative-literal-loads to build flags	2016-01-26 11:17:23 +00:00