Martin Schwidefsky eda0c6d6b0 s390: fix race on TIF_MCCK_PENDING ... There is a small race window in the __switch_to code in regard to the transfer of the TIF_MCCK_PENDING bit from the previous to the next task. The bit is transferred before the task struct pointer and the thread-info pointer for the next task has been stored to lowcore. If a machine check sets the TIF_MCCK_PENDING bit between the transfer code and the store of current/thread_info the bit is still set for the previous task. And if the previous task has terminated it can get lost. The effect is that a pending CRW is not retrieved until the next machine checks sets TIF_MCCK_PENDING. To fix this reorder __switch_to to first store the task struct and thread-info pointer and then do the transfer of the bit. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>		2012-05-16 14:42:46 +02:00
..
vdso32	s390: add various .gitignore files.	2012-05-16 14:42:41 +02:00
vdso64	s390: add various .gitignore files.	2012-05-16 14:42:41 +02:00
.gitignore	s390: add various .gitignore files.	2012-05-16 14:42:41 +02:00
asm-offsets.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
audit.c
audit.h
base.S	[S390] entry[64].S improvements	2011-12-27 11:27:12 +01:00
bitmap.c
compat_audit.c
compat_exec_domain.c
compat_linux.c	[S390] ipc: call generic sys_ipc demultiplexer	2011-12-27 11:27:13 +01:00
compat_linux.h
compat_ptrace.h
compat_signal.c	s390: remove dead code from signal handler	2012-05-16 14:42:40 +02:00
compat_wrapper.S	sys_poll: fix incorrect type for 'timeout' parameter	2012-02-21 17:24:20 -08:00
cpcmd.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
crash.c
crash_dump.c	[S390] kernel: Add OS info memory interface	2012-03-11 11:59:29 -04:00
debug.c	[S390] kernel: Add z/VM LGR detection	2012-03-11 11:59:29 -04:00
diag.c
dis.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
early.c	s390/time: always use stckf instead of stck if available	2012-05-16 14:42:41 +02:00
ebcdic.c
entry.h	[S390] irq: external interrupt code passing	2012-03-11 11:59:29 -04:00
entry.S	s390: fix race on TIF_MCCK_PENDING	2012-05-16 14:42:46 +02:00
entry64.S	s390: fix race on TIF_MCCK_PENDING	2012-05-16 14:42:46 +02:00
ftrace.c
head.S	s390/ipl: remove builtin tape ipl code	2012-05-16 14:42:40 +02:00
head31.S
head64.S
head_kdump.S
init_task.c
ipl.c	[S390] kernel: Add OS info memory interface	2012-03-11 11:59:29 -04:00
irq.c	[S390] irq: simple coding style change	2012-04-11 14:28:25 +02:00
jump_label.c
kprobes.c
lgr.c	[S390] Fix build errors (fallout from system.h disintegration)	2012-03-30 09:41:12 +02:00
machine_kexec.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
Makefile	[S390] perf: add support for s390x CPU counters	2012-03-23 11:13:25 +01:00
mcount.S
mcount64.S
mem_detect.c
module.c
nmi.c	[S390] rework idle code	2012-03-11 11:59:28 -04:00
os_info.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
perf_cpum_cf.c	[S390] cpum_cf: get rid of compile warnings	2012-04-11 14:28:25 +02:00
perf_event.c	[S390] Fix build errors (fallout from system.h disintegration)	2012-03-30 09:41:12 +02:00
process.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
processor.c
ptrace.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
reipl.S
reipl64.S	[S390] entry[64].S improvements	2011-12-27 11:27:12 +01:00
relocate_kernel.S
relocate_kernel64.S
s390_ksyms.c
sclp.S
setup.c	[S390] Fix build errors (fallout from system.h disintegration)	2012-03-30 09:41:12 +02:00
signal.c	s390: remove dead code from signal handler	2012-05-16 14:42:40 +02:00
smp.c	s390/smp: get rid of compile warning	2012-05-16 14:42:37 +02:00
stacktrace.c
suspend.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
swsusp_asm64.S	[S390] kernel: Add z/VM LGR detection	2012-03-11 11:59:29 -04:00
sys_s390.c	[S390] ipc: call generic sys_ipc demultiplexer	2011-12-27 11:27:13 +01:00
syscalls.S
sysinfo.c
time.c	[S390] irq: external interrupt code passing	2012-03-11 11:59:29 -04:00
topology.c	[S390] rework smp code	2012-03-11 11:59:28 -04:00
traps.c	Disintegrate asm/system.h for S390	2012-03-28 18:30:02 +01:00
vdso.c	Disintegrate and delete asm/system.h	2012-03-28 15:58:21 -07:00
vmlinux.lds.S	[S390] cleanup entry point definition	2012-01-18 18:03:41 +01:00
vtime.c	[S390] irq: external interrupt code passing	2012-03-11 11:59:29 -04:00