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linux/arch/s390/kernel
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Heiko Carstens f6c9b16023 s390/diag: avoid lockdep recursion 
The diagnose tracer will indirectly call back into the lockdep code
when lockdep does not expect it (arch_spinlock). This causes lockdep
to disable itself and therefore we don't have a working lock
dependency validator anymore.

This patch effectively disables tracing of diag 0x9c and 0x44 if
lockdep is enabled.  If however lockdep is enabled spinlocks are
mainly implemented using a trylock variant, which will not issue any
diag 0x9c or 0x44. So this change has hardly any effect on tracing
except when arch_spinlock and friends are explicitly used.

Reported-and-Tested-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-02-11 13:05:56 +01:00
..
vdso32 s390/vdso: optimize getcpu system call 2016-01-11 13:01:24 +01:00
vdso64 s390/vdso: optimize getcpu system call 2016-01-11 13:01:24 +01:00
.gitignore
asm-offsets.c s390/vdso: optimize getcpu system call 2016-01-11 13:01:24 +01:00
audit.c
audit.h
base.S s390/kdump: fix nosmt kernel parameter 2015-06-25 09:39:26 +02:00
cache.c s390/cachinfo: add missing facility check to init_cache_level() 2015-07-28 08:54:42 +02:00
compat_audit.c
compat_linux.c
compat_linux.h
compat_ptrace.h
compat_signal.c s390/fpu: always enable the vector facility if it is available 2015-10-14 14:32:08 +02:00
compat_wrapper.c s390: wire up copy_file_range syscall 2016-01-19 12:14:02 +01:00
cpcmd.c s390/diag: add a statistic for diagnose calls 2015-10-14 14:32:06 +02:00
crash_dump.c s390: remove superfluous memblock_alloc() return value checks 2016-01-19 12:14:02 +01:00
debug.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
diag.c s390/diag: add a s390 prefix to the diagnose trace point 2015-11-09 09:10:47 +01:00
dis.c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 2016-01-13 13:16:16 -08:00
dumpstack.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
early.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
ebcdic.c
entry.h s390/udelay: make udelay have busy loop semantics 2015-10-14 14:32:13 +02:00
entry.S s390/spinlock: do not yield to a CPU in udelay/mdelay 2015-11-27 09:24:18 +01:00
ftrace.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
head64.S s390/facilities: always use lowcore's stfle field for storing facility bits 2015-12-18 14:59:19 +01:00
head_kdump.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
head.S s390/facilities: make use of generated facility list 2015-12-18 14:59:21 +01:00
idle.c
ipl.c s390: remove all usages of PSW_ADDR_AMODE 2016-01-19 12:14:02 +01:00
irq.c s390: remove runtime instrumentation interrupts 2015-11-03 14:40:51 +01:00
jump_label.c Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-03 15:46:07 -07:00
kprobes.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
lgr.c
machine_kexec.c s390/dump: rework CPU register dump code 2015-11-27 09:24:14 +01:00
Makefile s390: get rid of CONFIG_SCHED_MC and CONFIG_SCHED_BOOK 2015-12-30 10:34:57 +01:00
mcount.S
module.c module: use a structure to encapsulate layout. 2015-12-04 22:46:25 +01:00
nmi.c s390/nmi: reduce size of percpu variable 2015-10-27 09:33:57 +01:00
os_info.c s390/dump: streamline oldmem copy functions 2015-11-27 09:24:12 +01:00
perf_cpum_cf_events.c
perf_cpum_cf.c Merge branch 'linus' into perf/core, to pick up fixes before applying new changes 2015-09-28 08:06:57 +02:00
perf_cpum_sf.c s390/cpumf: rework program parameter setting to detect guest samples 2015-10-14 14:32:12 +02:00
perf_event.c s390/perf_event: fix address range for asynchronous stack 2016-02-10 09:25:22 +01:00
pgm_check.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
process.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
processor.c s390: show virtualization support in /proc/cpuinfo 2015-11-30 12:47:11 +01:00
ptrace.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
reipl.S s390/dump: rework CPU register dump code 2015-11-27 09:24:14 +01:00
relocate_kernel.S s390: remove "64" suffix from a couple of files 2015-03-25 11:49:34 +01:00
runtime_instr.c s390: remove runtime instrumentation interrupts 2015-11-03 14:40:51 +01:00
s390_ksyms.c s390/fpu: split fpu-internal.h into fpu internals, api, and type headers 2015-10-16 09:41:12 +02:00
sclp.c s390/sclp: Add VT220 support to early sclp console 2015-11-27 09:24:17 +01:00
setup.c s390: remove all usages of PSW_ADDR_AMODE 2016-01-19 12:14:02 +01:00
signal.c s390: remove all usages of PSW_ADDR_AMODE 2016-01-19 12:14:02 +01:00
smp.c s390: remove superfluous memblock_alloc() return value checks 2016-01-19 12:14:02 +01:00
stacktrace.c s390/stacktrace: add save_stack_trace_regs() 2016-02-10 09:25:22 +01:00
suspend.c PCI: Include <linux/pci.h>, not <asm/pci.h> 2015-06-08 07:55:03 -05:00
swsusp.S s390/hibernate: fix save and restore of vector registers 2015-09-17 13:43:41 +02:00
sys_s390.c s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
syscalls.S s390: wire up copy_file_range syscall 2016-01-19 12:14:02 +01:00
sysinfo.c s390/sysinfo: add missing SYSIB 1.2.2 multithreading fields 2016-01-11 12:27:00 +01:00
time.c s390/etr,stp: fix possible deadlock on machine check 2015-10-14 14:32:18 +02:00
topology.c s390/topology: reduce per_cpu() invocations 2015-10-27 09:34:39 +01:00
trace.c s390/diag: avoid lockdep recursion 2016-02-11 13:05:56 +01:00
traps.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
uprobes.c s390/uprobes: fix address space annotation 2015-03-25 11:49:47 +01:00
vdso.c s390/vdso: optimize getcpu system call 2016-01-11 13:01:24 +01:00
vmlinux.lds.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
vtime.c s390/vtime: correct scaled cputime of partially idle CPUs 2015-09-30 16:22:38 +02:00