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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2019-04-30 12:33:45 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2019-05-02 13:54:11 +0200
commit98587c2d894c34c9af5cd84ca169e1cd493aa692 (patch)
treecced9b62cec4042ed7567fa3f834e861d4b73487 /kernel/panic.c
parentec7bf4789d95a0053bac0dfa36fbefd8cc584eea (diff)
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 'kernel/panic.c')
-rw-r--r--kernel/panic.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/kernel/panic.c b/kernel/panic.c
index 0ae0d7332f12..c1fcaad337b7 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -318,12 +318,7 @@ void panic(const char *fmt, ...)
}
#endif
#if defined(CONFIG_S390)
- {
- unsigned long caller;
-
- caller = (unsigned long)__builtin_return_address(0);
- disabled_wait(caller);
- }
+ disabled_wait();
#endif
pr_emerg("---[ end Kernel panic - not syncing: %s ]---\n", buf);
local_irq_enable();

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