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| author |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-30 12:33:45 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-05-02 13:54:11 +0200 |
| commit | 98587c2d894c34c9af5cd84ca169e1cd493aa692 (patch) | |
| tree | cced9b62cec4042ed7567fa3f834e861d4b73487 /arch/s390/boot/startup.c | |
| parent | s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR (diff) | |
| download | linux-dev-98587c2d894c34c9af5cd84ca169e1cd493aa692.tar.xz linux-dev-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/boot/startup.c')
| -rw-r--r-- | arch/s390/boot/startup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index 4401e992bda1..7b0d05414618 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -57,7 +57,7 @@ void error(char *x) sclp_early_printk(x); sclp_early_printk("\n\n -- System halted"); - disabled_wait(0xdeadbeef); + disabled_wait(); } #ifdef CONFIG_KERNEL_UNCOMPRESSED |