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

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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>

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Martin Schwidefsky 2010-05-17 10:00:02 +02:00 • committed by Martin Schwidefsky

parent 43d399d2ab

commit 6a2df3a872

4 changed files with 183 additions and 228 deletions

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5

arch/s390/include/asm/system.h

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205

arch/s390/kernel/entry.S

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197

arch/s390/kernel/entry64.S

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4

arch/s390/kernel/setup.c

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