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4e042af463
linux/arch/s390/kernel
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Heiko Carstens 4e042af463 s390/kexec: fix crash on resize of reserved memory 
Reducing the size of reserved memory for the crash kernel will result
in an immediate crash on s390. Reason for that is that we do not
create struct pages for memory that is reserved. If that memory is
freed any access to struct pages which correspond to this memory will
result in invalid memory accesses and a kernel panic.

Fix this by properly creating struct pages when the system gets
initialized. Change the code also to make use of set_memory_ro() and
set_memory_rw() so page tables will be split if required.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2016-06-13 15:58:19 +02:00
..
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/mm: split arch/s390/mm/pgtable.c 2016-03-08 15:00:15 +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/cpuinfo: show dynamic and static cpu mhz 2016-06-13 15:58:17 +02:00
compat_audit.c
compat_linux.c groups: Consolidate the setgroups permission checks 2014-12-05 17:19:27 -06:00
compat_linux.h s390: add support for vector extension 2014-10-09 09:14:13 +02:00
compat_ptrace.h
compat_signal.c s390/compat: correct restore of high gprs on signal return 2016-02-22 09:29:35 +01:00
compat_wrapper.c s390: wire up copy_file_range syscall 2016-01-19 12:14:02 +01:00
cpcmd.c s390: Use pr_warn instead of pr_warning 2016-03-07 13:12:04 +01:00
crash_dump.c s390: make couple of variables and functions static 2016-05-10 13:24:50 +02:00
debug.c s390: Use pr_warn instead of pr_warning 2016-03-07 13:12:04 +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 s390/dis: use correct escape sequence for '%' character 2016-03-02 06:44:25 -06:00
dumpstack.c s390/dumpstack: implement and use return_address() 2016-05-04 16:29:45 +02:00
early.c s390: dump_stack: fill in arch description 2016-06-13 15:58:18 +02:00
ebcdic.c
entry.h s390: add missing declarations 2016-05-10 13:24:51 +02:00
entry.S s390: fix floating pointer register corruption (again) 2016-03-10 14:35:42 +01:00
ftrace.c s390: remove all usages of PSW_ADDR_INSN 2016-01-19 12:14:03 +01:00
head64.S s390/cpumf: Fix lpp detection 2016-03-08 10:38:06 +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 s390/idle: convert open coded idle time seqcount 2014-12-08 09:42:32 +01:00
ipl.c s390: remove all usages of PSW_ADDR_AMODE 2016-01-19 12:14:02 +01:00
irq.c s390: add current_stack_pointer() helper function 2016-02-23 08:56:18 +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 s390/sysinfo,stsi: change return code handling 2012-09-26 15:45:12 +02:00
machine_kexec.c s390/kexec: fix crash on resize of reserved memory 2016-06-13 15:58:19 +02:00
Makefile s390: get rid of CONFIG_SCHED_MC and CONFIG_SCHED_BOOK 2015-12-30 10:34:57 +01:00
mcount.S s390/ftrace: hotpatch support for function tracing 2015-01-29 09:19:25 +01:00
module.c module: s390: keep mod_arch_specific for livepatch modules 2016-04-01 15:00:11 +02:00
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 s390/cpum_cf: Export event names in sysfs 2013-12-16 14:37:50 +01:00
perf_cpum_cf.c s390/cpum_cf: Remove superfluous SMP function call 2016-05-03 09:25:44 +02:00
perf_cpum_sf.c s390/cpum_sf: Remove superfluous SMP function call 2016-05-03 09:25:46 +02:00
perf_event.c perf core: Pass max stack as a perf_callchain_entry context 2016-05-16 23:11:50 -03:00
pgm_check.S s390: remove 31 bit support 2015-03-25 11:49:33 +01:00
process.c exit_thread: accept a task parameter to be exited 2016-05-20 17:58:30 -07:00
processor.c s390/cpuinfo: show dynamic and static cpu mhz 2016-06-13 15:58:17 +02:00
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/kexec: fix crash on resize of reserved memory 2016-06-13 15:58:19 +02:00
signal.c s390: remove all usages of PSW_ADDR_AMODE 2016-01-19 12:14:02 +01:00
smp.c sched: Allow per-cpu kernel threads to run on online && !active 2016-05-06 14:58:22 +02:00
stacktrace.c s390/dumpstack: merge all four stack tracers 2016-02-23 08:56:20 +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 preadv2/pwritev2 syscalls 2016-04-01 08:42:38 +02:00
sysinfo.c s390/sysinfo: add missing SYSIB 1.2.2 multithreading fields 2016-01-11 12:27:00 +01:00
time.c param: convert some "on"/"off" users to strtobool 2016-03-17 15:09:34 -07:00
topology.c param: convert some "on"/"off" users to strtobool 2016-03-17 15:09:34 -07:00
trace.c s390/diag: avoid lockdep recursion 2016-02-11 13:05:56 +01:00
traps.c s390/fault: merge report_user_fault implementations 2016-03-02 06:44:27 -06:00
uprobes.c s390/uprobes: fix address space annotation 2015-03-25 11:49:47 +01:00
vdso.c vdso: make arch_setup_additional_pages wait for mmap_sem for write killable 2016-05-23 17:04:14 -07:00
vmlinux.lds.S s390/mm: align swapper_pg_dir to 16k 2016-06-13 15:58:18 +02:00
vtime.c s390: add missing declarations 2016-05-10 13:24:51 +02:00