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linux/arch/sparc/kernel
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David S. Miller ab5c780913 sparc64: Do irq_{enter,exit}() around generic_smp_call_function*(). 
Otherwise rcu_irq_{enter,exit}() do not happen and we get dumps like:

====================
[  188.275021] ===============================
[  188.309351] [ INFO: suspicious RCU usage. ]
[  188.343737] 3.18.0-rc3-00068-g20f3963-dirty #54 Not tainted
[  188.394786] -------------------------------
[  188.429170] include/linux/rcupdate.h:883 rcu_read_lock() used
illegally while idle!
[  188.505235]
other info that might help us debug this:

[  188.554230]
RCU used illegally from idle CPU!
rcu_scheduler_active = 1, debug_locks = 0
[  188.637587] RCU used illegally from extended quiescent state!
[  188.690684] 3 locks held by swapper/7/0:
[  188.721932]  #0:  (&x->wait#11){......}, at: [<0000000000495de8>] complete+0x8/0x60
[  188.797994]  #1:  (&p->pi_lock){-.-.-.}, at: [<000000000048510c>] try_to_wake_up+0xc/0x400
[  188.881343]  #2:  (rcu_read_lock){......}, at: [<000000000048a910>] select_task_rq_fair+0x90/0xb40
[  188.973043]stack backtrace:
[  188.993879] CPU: 7 PID: 0 Comm: swapper/7 Not tainted 3.18.0-rc3-00068-g20f3963-dirty #54
[  189.076187] Call Trace:
[  189.089719]  [0000000000499360] lockdep_rcu_suspicious+0xe0/0x100
[  189.147035]  [000000000048a99c] select_task_rq_fair+0x11c/0xb40
[  189.202253]  [00000000004852d8] try_to_wake_up+0x1d8/0x400
[  189.252258]  [000000000048554c] default_wake_function+0xc/0x20
[  189.306435]  [0000000000495554] __wake_up_common+0x34/0x80
[  189.356448]  [00000000004955b4] __wake_up_locked+0x14/0x40
[  189.406456]  [0000000000495e08] complete+0x28/0x60
[  189.448142]  [0000000000636e28] blk_end_sync_rq+0x8/0x20
[  189.496057]  [0000000000639898] __blk_mq_end_request+0x18/0x60
[  189.550249]  [00000000006ee014] scsi_end_request+0x94/0x180
[  189.601286]  [00000000006ee334] scsi_io_completion+0x1d4/0x600
[  189.655463]  [00000000006e51c4] scsi_finish_command+0xc4/0xe0
[  189.708598]  [00000000006ed958] scsi_softirq_done+0x118/0x140
[  189.761735]  [00000000006398ec] __blk_mq_complete_request_remote+0xc/0x20
[  189.827383]  [00000000004c75d0] generic_smp_call_function_single_interrupt+0x150/0x1c0
[  189.906581]  [000000000043e514] smp_call_function_single_client+0x14/0x40
====================

Based almost entirely upon a patch by Paul E. McKenney.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-07 09:50:48 -08:00
..
.gitignore
apc.c sparc idle: rename pm_idle to sparc_idle 2013-02-17 23:36:56 -05:00
asm-offsets.c [PATCH] sparc32: vm_area_struct access for old Sun SPARCs. 2013-07-10 13:56:10 -07:00
audit.c sparc64: fix sparse warnings in compat_audit.c 2014-05-18 19:01:34 -07:00
auxio_32.c sparc32: fix sparse warning in auxio_32.c 2014-05-18 19:01:27 -07:00
auxio_64.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
btext.c sparc64: fix sparse warning in btext.c 2014-05-18 19:01:30 -07:00
central.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
cherrs.S
chmc.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
compat_audit.c sparc64: fix sparse warnings in compat_audit.c 2014-05-18 19:01:34 -07:00
cpu.c sparc64: correctly recognise M6 and M7 cpu type 2014-09-09 15:24:10 -07:00
cpumap.c sparc64: support M6 and M7 for building CPU distribution map 2014-09-09 15:24:10 -07:00
cpumap.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
devices.c sparc32: drop tadpole specific code 2014-05-18 19:01:29 -07:00
dma.c
ds.c sparc64: Move request_irq() from ldc_bind() to ldc_alloc() 2014-09-16 18:31:31 -07:00
dtlb_miss.S
dtlb_prot.S sparc64: Fix corrupted thread fault code. 2014-10-18 23:03:09 -04:00
ebus.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
entry.h sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
entry.S sparc32: Fix exit flag passed from traced sys_sigreturn 2013-07-31 19:10:04 -07:00
etrap_32.S
etrap_64.S
fpu_traps.S
ftrace.c ftrace: Do not pass data to ftrace_dyn_arch_init 2014-03-07 10:06:14 -05:00
getsetcc.S
head_32.S
head_64.S sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
helpers.S
hvapi.c sparc64: T5 PMU 2014-09-16 18:26:40 -07:00
hvcalls.S sparc64: T5 PMU 2014-09-16 18:26:40 -07:00
hvtramp.S sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
idprom.c
iommu_common.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
iommu.c sparc64: fix sparse warning in pci.c 2014-05-18 19:01:31 -07:00
ioport.c sparc32: dma_alloc_coherent must honour gfp flags 2014-09-10 14:03:28 -07:00
irq_32.c sparc32: fix sparse warnings in irq_32.c 2014-04-29 01:12:25 -04:00
irq_64.c sparc64: sparse irq 2014-10-05 16:53:40 -07:00
irq.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
itlb_miss.S
ivec.S
jump_label.c
kernel.h sparc64: fix sparse warning in kgdb_64.c 2014-05-18 19:01:34 -07:00
kgdb_32.c sparc: explicitly include sched.h to get task_thread_info declaration 2013-02-06 11:04:10 -08:00
kgdb_64.c sparc64: fix sparse warning in kgdb_64.c 2014-05-18 19:01:34 -07:00
kprobes.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
kstack.h
ktlb.S sparc64: Adjust vmalloc region size based upon available virtual address bits. 2014-10-05 16:53:40 -07:00
ldc.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc 2014-10-11 20:36:34 -04:00
led.c
leon_kernel.c sparc: leon: Fix race condition between leon_cycles_offset and timer_interrupt 2014-09-09 16:39:10 -07:00
leon_pci_grpci1.c sparc32: replace flip_dword() with swab32() 2014-05-02 01:30:21 -04:00
leon_pci_grpci2.c sparc32: replace flip_dword() with swab32() 2014-05-02 01:30:21 -04:00
leon_pci.c sparc32: introduce asm-generic/io.h 2014-05-02 01:30:21 -04:00
leon_pmc.c sparc32: fix sparse warnings in leon_pmc.c 2014-04-29 01:12:27 -04:00
leon_smp.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
Makefile sparc32: drop tadpole specific code 2014-05-18 19:01:29 -07:00
mdesc.c sparc: Add support for seek and shorter read to /dev/mdesc 2014-07-21 21:37:06 -07:00
misctrap.S
module.c mm/arch: use NUMA_NO_NODE 2013-11-13 12:09:05 +09:00
nmi.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
of_device_32.c
of_device_64.c
of_device_common.c sparc: fix sparse warnings in of_device_common.c 2014-04-29 01:12:27 -04:00
of_device_common.h
pci_common.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
pci_fire.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_impl.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
pci_msi.c
pci_psycho.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_sabre.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
pci_schizo.c sparc64: Fix crashes in schizo_pcierr_intr_other(). 2014-11-01 00:33:58 -04:00
pci_sun4v_asm.S
pci_sun4v.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
pci_sun4v.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
pci.c sparc64: Properly claim resources as each PCI bus is probed. 2014-08-13 21:17:49 -07:00
pcic.c sparc32: fix sparse warnings in pcic.c 2014-05-18 19:01:27 -07:00
pcr.c sparc64: T5 PMU 2014-09-16 18:26:40 -07:00
perf_event.c Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu 2014-10-15 07:48:18 +02:00
pmc.c sparc idle: rename pm_idle to sparc_idle 2013-02-17 23:36:56 -05:00
power.c sparc: remove __devinit, __devexit annotations 2013-01-12 15:28:45 -08:00
process_32.c sparc32: fix sparse warning in auxio_32.c 2014-05-18 19:01:27 -07:00
process_64.c sparc64: Fix pcr_ops initialization and usage bugs. 2014-08-11 20:45:12 -07:00
prom_32.c
prom_64.c sparc64: fix sparse warning in prom_64.c 2014-05-18 19:01:31 -07:00
prom_common.c of: Fix locking vs. interrupts 2013-06-13 22:12:14 +01:00
prom_irqtrans.c
prom.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
psycho_common.c
psycho_common.h sparc: drop use of extern for prototypes in arch/sparc/* 2014-05-18 19:01:29 -07:00
ptrace_32.c sparc32: fix sparse warning in ptrace_32.c 2014-04-29 01:12:26 -04:00
ptrace_64.c ARCH: AUDIT: audit_syscall_entry() should not require the arch 2014-09-23 16:21:26 -04:00
reboot.c
rtrap_32.S
rtrap_64.S Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2013-11-19 10:40:00 -08:00
sbus.c sparc: kernel/sbus.c: fix memory leakage 2013-01-21 14:33:00 -08:00
setup_32.c sparc32: fix sparse warnings in setup_32.c 2014-04-29 01:12:25 -04:00
setup_64.c sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
signal32.c sparc64: clean up compat_sigset_t.seta handling 2014-05-18 19:01:32 -07:00
signal_32.c sparc32: fix sparse warnings in signal_32.c 2014-04-29 01:12:25 -04:00
signal_64.c sparc64: fix sparse "Should it be static?" warnings in signal32.c 2014-05-18 19:01:32 -07:00
sigutil_32.c
sigutil_64.c
sigutil.h
smp_32.c sparc: fix decimal printf format specifiers prefixed with 0x 2014-08-06 14:41:10 -07:00
smp_64.c sparc64: Do irq_{enter,exit}() around generic_smp_call_function*(). 2014-11-07 09:50:48 -08:00
sparc_ksyms_32.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
sparc_ksyms_64.c sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
spiterrs.S
sstate.c
stacktrace.c
starfire.c
sun4d_irq.c sparc32: fix sparse warnings in sun4d_irq.c 2014-04-29 01:12:25 -04:00
sun4d_smp.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
sun4m_irq.c sun4M: add include of slab.h for kzalloc 2014-02-12 16:10:45 -05:00
sun4m_smp.c sparc: delete __cpuinit/__CPUINIT usage from all users 2013-07-14 19:36:52 -04:00
sun4v_ivec.S
sun4v_tlb_miss.S sparc64: sun4v TLB error power off events 2014-09-16 17:46:44 -07:00
sys32.S sparc: Hook up renameat2 syscall. 2014-07-21 22:27:56 -07:00
sys_sparc32.c sparc64: fix sparse warnings in sys_sparc32.c 2014-05-18 19:01:31 -07:00
sys_sparc_32.c sparc32: fix sparse warnings in sys_sparc_32.c 2014-05-18 19:01:28 -07:00
sys_sparc_64.c sparc64: fix sparse warnings in sys_sparc_64.c + unaligned_64.c 2014-05-18 19:01:30 -07:00
syscalls.S sparc64: don't treat 64-bit syscall return codes as 32-bit 2014-03-17 15:54:52 -04:00
sysfs.c sparc64: fix format string mismatch in arch/sparc/kernel/sysfs.c 2014-05-21 12:54:42 -07:00
systbls_32.S sparc: Hook up bpf system call. 2014-10-28 11:30:43 -07:00
systbls_64.S sparc: Hook up bpf system call. 2014-10-28 11:30:43 -07:00
systbls.h sparc64: fix sparse warnings in sys_sparc32.c 2014-05-18 19:01:31 -07:00
time_32.c sparc32: fix sparse warnings in time_32.c 2014-05-18 19:01:27 -07:00
time_64.c sparc: Replace __get_cpu_var uses 2014-08-26 13:45:55 -04:00
trampoline_32.S sparc: delete non-required instances of include <linux/init.h> 2014-01-28 23:38:23 -08:00
trampoline_64.S sparc64: Fix register corruption in top-most kernel stack frame during boot. 2014-10-24 09:52:49 -07:00
traps_32.c sparc: fix sparse warning in math_{32,64} 2014-05-18 19:01:28 -07:00
traps_64.c sparc64: sun4v TLB error power off events 2014-09-16 17:46:44 -07:00
tsb.S sparc64: Fix corrupted thread fault code. 2014-10-18 23:03:09 -04:00
ttable_32.S
ttable_64.S
una_asm_32.S
una_asm_64.S
unaligned_32.c sparc: use %s for unaligned panic 2014-07-21 21:37:06 -07:00
unaligned_64.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next 2014-06-19 07:50:07 -10:00
utrap.S
vio.c sparc64: Add vio_set_intr() to enable/disable Rx interrupts 2014-09-30 14:40:45 -07:00
viohs.c sparc: VIO protocol version 1.6 2014-09-30 14:17:08 -07:00
visemul.c
vmlinux.lds.S sparc64: Kill unnecessary tables and increase MAX_BANKS. 2014-10-05 16:53:40 -07:00
windows.c sparc32: fix sparse warnings in windows.c 2014-04-29 01:12:25 -04:00
winfixup.S
wof.S
wuf.S