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author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-30 12:33:45 +0200 |
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committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-05-02 13:54:11 +0200 |
commit | 98587c2d894c34c9af5cd84ca169e1cd493aa692 (patch) | |
tree | cced9b62cec4042ed7567fa3f834e861d4b73487 /arch/s390/kernel/nmi.c | |
parent | ec7bf4789d95a0053bac0dfa36fbefd8cc584eea (diff) | |
download | linux-stable-98587c2d894c34c9af5cd84ca169e1cd493aa692.tar.gz linux-stable-98587c2d894c34c9af5cd84ca169e1cd493aa692.tar.bz2 linux-stable-98587c2d894c34c9af5cd84ca169e1cd493aa692.zip |
s390: simplify disabled_wait
The disabled_wait() function uses its argument as the PSW address when
it stops the CPU with a wait PSW that is disabled for interrupts.
The different callers sometimes use a specific number like 0xdeadbeef
to indicate a specific failure, the early boot code uses 0 and some
other calls sites use __builtin_return_address(0).
At the time a dump is created the current PSW and the registers of a
CPU are written to lowcore to make them avaiable to the dump analysis
tool. For a CPU stopped with disabled_wait the PSW and the registers
do not really make sense together, the PSW address does not point to
the function the registers belong to.
Simplify disabled_wait() by using _THIS_IP_ for the PSW address and
drop the argument to the function.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/nmi.c')
-rw-r--r-- | arch/s390/kernel/nmi.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/kernel/nmi.c b/arch/s390/kernel/nmi.c index 8c867b43c8eb..0a487fae763e 100644 --- a/arch/s390/kernel/nmi.c +++ b/arch/s390/kernel/nmi.c @@ -125,7 +125,7 @@ void nmi_free_per_cpu(struct lowcore *lc) static notrace void s390_handle_damage(void) { smp_emergency_stop(); - disabled_wait((unsigned long) __builtin_return_address(0)); + disabled_wait(); while (1); } NOKPROBE_SYMBOL(s390_handle_damage); |