tree 384b646d0a826ab5c2bafa63e9bea4a057815fe2
parent 43d399d2ab7e96cb8d952d0ba4e9131587b7c8b9
author Martin Schwidefsky <schwidefsky@de.ibm.com> 1274083202 +0200
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> 1274083215 +0200

[S390] improve irq tracing code in entry[64].S

The system call path in entry[64].S is run with interrupts enabled.
Remove the irq tracing check from the system call exit code. If a
program check interrupted a context enabled for interrupts do a
call to trace_irq_off_caller in the program check handler before
branching to the system call exit code.
Restructure the system call and io interrupt return code to avoid
avoid the lpsw[e] to disable machine checks.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>