s390/kernel: squeeze a few more cycles out of the system call handler

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Reorder the instructions of UPDATE_VTIME to improve superscalar execution,
remove duplicate checks for problem-state from the asynchronous interrupt
handlers, and move the check for problem-state from the synchronous
exit path to the program check path as it is only needed for program
checks inside the kernel.

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

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Martin Schwidefsky 2015-06-22 17:27:48 +02:00

parent d0fc41071a

commit a359bb1190

1 changed files with 34 additions and 41 deletions

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arch/s390/kernel/entry.S

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