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8e94de44ea748e6ea2b7e922b3203fd6b8403102
linux/arch/s390/include/asm
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Sven Schnelle ddf4aada93 s390/ftrace: fix endless recursion in function_graph tracer 
[ Upstream commit 6feeee8efc ]

The following sequence triggers a kernel stack overflow on s390x:

mount -t tracefs tracefs /sys/kernel/tracing
cd /sys/kernel/tracing
echo function_graph > current_tracer
[crash]

This is because preempt_count_{add,sub} are in the list of traced
functions, which can be demonstrated by:

echo preempt_count_add >set_ftrace_filter
echo function_graph > current_tracer
[crash]

The stack overflow happens because get_tod_clock_monotonic() gets called
by ftrace but itself calls preempt_{disable,enable}(), which leads to a
endless recursion. Fix this by using preempt_{disable,enable}_notrace().

Fixes: 011620688a ("s390/time: ensure get_clock_monotonic() returns monotonic values")
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2019-12-31 16:36:20 +01:00
..
fpu
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
airq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
alternative-asm.h
s390: add assembler macros for CPU alternatives
2018-03-28 08:38:27 +02:00
alternative.h
s390: add a few more SPDX identifiers
2017-12-05 07:51:09 +01:00
ap.h
s390/ap: rework assembler functions to use unions for in/out register variables
2019-06-25 11:35:53 +08:00
appldata.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
archrandom.h
s390/archrandom: Rework arch random implementation.
2018-05-30 11:18:04 +02:00
asm-prototypes.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
atomic_ops.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
atomic.h
atomics/treewide: Make conditional inc/dec ops optional
2018-06-21 14:25:24 +02:00
barrier.h
s390: add optimized array_index_mask_nospec
2018-02-05 07:51:41 +01:00
bitops.h
s390/bitops: add test_and_clear_bit_inv()
2018-01-26 10:47:38 +01:00
bug.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
bugs.h
s390: add a few more SPDX identifiers
2017-12-05 07:51:09 +01:00
cache.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ccwdev.h
s390/cio: add helper to query utility strings per given ccw device
2018-05-23 08:06:56 +02:00
ccwgroup.h
s390/cio: add test for ccwgroup device
2018-05-23 08:06:58 +02:00
checksum.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
chpid.h
s390/cio: rename struct channel_path_desc
2018-03-26 16:13:11 +02:00
cio.h
s390: assume diag308 set always works
2018-04-10 07:38:59 +02:00
clp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cmb.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cmpxchg.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
compat.h
y2038: s390: Remove unneeded ipc uapi header files
2018-04-20 16:19:58 +02:00
cpacf.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
cpcmd.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpu_mf.h
s390/cpum_sf: save TOD clock base in SDBs for time conversion
2018-07-31 11:02:27 +02:00
cpu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpufeature.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cputime.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
crw.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
css_chars.h
s390/cio: sanitize css_general_characteristics definition
2018-06-12 15:14:05 +02:00
ctl_reg.h
KVM: s390: introduce defines for control registers
2018-05-17 09:02:27 +02:00
current.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
debug.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
delay.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
diag.h
s390/diag: add diag26c support for VNIC info
2018-01-02 13:52:23 -05:00
dis.h
s390/tools: generate header files in arch/s390/include/generated/
2018-01-23 07:36:53 +01:00
dma.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
dwarf.h
s390/vdso: revise CFI annotations of vDSO functions
2017-12-13 10:51:36 +01:00
eadm.h
s390/eadm: fix CONFIG_BLOCK include dependency
2018-02-02 10:47:14 +01:00
ebcdic.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
elf.h
s390: limit brk randomization to 32MB
2019-05-04 09:20:11 +02:00
exec.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
extable.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
extmem.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
facility.h
s390: fix stfle zero padding
2019-07-21 09:03:14 +02:00
fcx.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ftrace.h
s390/ftrace: Add -mfentry and -mnop-mcount support
2018-08-15 22:39:53 -04:00
futex.h
s390: remove all code using the access register mode
2017-11-14 11:01:47 +01:00
gmap.h
s390/mm: Add huge page dirty sync support
2018-07-30 11:20:18 +01:00
hardirq.h
softirq/s390: Move default mutators of overwritten softirq mask to s390
2018-05-14 11:25:28 +02:00
hugetlb.h
s390/mm: Clear skeys for newly mapped huge guest pmds
2018-07-30 11:20:18 +01:00
hw_irq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
idals.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
idle.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
io.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
ipl.h
s390/ipl: correct kdump reipl block checksum calculation
2018-04-10 07:39:00 +02:00
irq.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
irqflags.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
isc.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
itcw.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
jump_label.h
s390/jump_label: Use "jdd" constraint on gcc9
2019-06-25 11:35:52 +08:00
Kbuild
Merge tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
2018-02-01 16:56:07 -08:00
kdebug.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
kexec.h
s390/kexec_file: Add ELF loader
2018-04-16 09:10:23 +02:00
kprobes.h
s390/kprobes: Remove jprobe implementation
2018-06-21 12:33:10 +02:00
kvm_host.h
KVM: Call kvm_arch_memslots_updated() before updating memslots
2019-03-23 20:10:13 +01:00
kvm_para.h
KVM: Introduce paravirtualization hints and KVM_HINTS_DEDICATED
2018-03-06 18:40:44 +01:00
linkage.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
livepatch.h
s390: include: Remove redundant license text
2017-11-24 15:37:22 +01:00
lowcore.h
s390: align struct lowcore to double page size
2018-07-02 11:25:01 +02:00
mmu_context.h
s390/vdso: correct vdso mapping for compat tasks
2019-11-20 18:47:53 +01:00
mmu.h
s390/vdso: avoid 64-bit vdso mapping for compat tasks
2019-11-20 18:47:08 +01:00
mmzone.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
module.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
nmi.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
nospec-branch.h
s390: correct nospec auto detection init order
2018-04-11 17:46:00 +02:00
nospec-insn.h
s390: disable asm code expolines if cc does not support it
2018-06-25 10:14:37 +02:00
numa.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
os_info.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
page-states.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
page.h
s390/dma: provide proper ARCH_ZONE_DMA_BITS value
2019-08-16 10:12:50 +02:00
pci_clp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci_debug.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
pci_dma.h
s390: move s390_pci_dma_ops to asm/pci_dma.h
2018-01-10 16:41:19 +01:00
pci_insn.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
pci_io.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pci.h
s390/pci: add fmt3 fmb
2018-07-04 08:35:58 +02:00
percpu.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
perf_event.h
s390/bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type
2017-12-05 15:02:41 +01:00
pgalloc.h
s390/mm: add mm_pxd_folded() checks to pxd_free()
2019-12-31 16:35:31 +01:00
pgtable.h
s390/mm: properly clear _PAGE_NOEXEC bit when it is not supported
2019-12-17 20:34:57 +01:00
pkey.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
pnet.h
s390/net: add pnetid support
2018-05-30 11:18:03 +02:00
preempt.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
processor.h
s390: run user space and KVM guests with modified branch prediction
2018-02-05 14:48:50 +01:00
ptrace.h
s390/bpf: correct broken uapi for BPF_PROG_TYPE_PERF_EVENT program type
2017-12-05 15:02:41 +01:00
purgatory.h
s390/purgatory: Remove duplicate variable definitions
2018-07-06 08:47:51 +02:00
qdio.h
s390/qdio: reset old sbal_state flags
2018-06-25 10:14:37 +02:00
runtime_instr.h
s390/runtime instrumentation: provide uapi header file
2018-02-02 10:47:15 +01:00
schid.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sclp.h
s390/hibernate: fix error handling when suspend cpu != resume cpu
2018-09-20 13:20:23 +02:00
scsw.h
s390: fix comment for scsw_cmd_is_valid_sctl
2018-02-22 15:31:24 +01:00
seccomp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sections.h
s390: remove unused _ehead symbol
2018-07-02 11:24:58 +02:00
segment.h
s390: add a few more SPDX identifiers
2017-12-05 07:51:09 +01:00
serial.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
set_memory.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
setup.h
s390/boot: block uncompressed vmlinux booting attempts
2018-07-02 11:25:05 +02:00
shmparam.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
signal.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
sigp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
smp.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
sparsemem.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
spinlock_types.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
spinlock.h
Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2017-11-13 12:38:26 -08:00
stp.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
string.h
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2017-11-13 11:47:01 -08:00
switch_to.h
s390: always save and restore all registers on context switch
2017-12-05 07:51:08 +01:00
syscall.h
s390: include: Remove redundant license text
2017-11-24 15:37:22 +01:00
sysinfo.h
s390/sysinfo: add and display licensed internal code identifier
2018-02-02 10:47:15 +01:00
termios.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
thread_info.h
s390: update sampling tag after task pid change
2018-04-23 07:57:17 +02:00
timex.h
s390/ftrace: fix endless recursion in function_graph tracer
2019-12-31 16:36:20 +01:00
tlb.h
s390/mm: fix mis-accounting of pgtable_bytes
2018-11-27 16:13:03 +01:00
tlbflush.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
topology.h
s390/topology: fix compile error in file arch/s390/kernel/smp.c
2017-11-20 08:51:01 +01:00
uaccess.h
s390/uaccess: avoid (false positive) compiler warnings
2019-11-06 13:06:08 +01:00
unistd.h
s390/syscalls: use generated syscall_table.h and unistd.h header files
2018-01-23 07:36:52 +01:00
uprobes.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
user.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vdso.h
s390/vdso: add missing boot_vdso_data declaration
2017-11-14 22:07:49 +01:00
vga.h
s390: add a few more SPDX identifiers
2017-12-05 07:51:09 +01:00
vtime.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vtimer.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
vx-insn.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
xor.h
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00