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  • Martin Schwidefsky's avatar
    [S390] improve irq tracing code in entry[64].S · 6a2df3a8
    Martin Schwidefsky authored
    
    
    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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
    6a2df3a8