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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2010-04-09 13:43:00 +0200
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2010-04-09 13:43:02 +0200
commit176b1803ce4690d0dd94e16f118dbd14af045034 (patch)
tree92601341680bf89e42ed0073bd5086d16405356c /lib
parent35ac734f72d846f250c0344913a91f954ea764c3 (diff)
downloadop-kernel-dev-176b1803ce4690d0dd94e16f118dbd14af045034.zip
op-kernel-dev-176b1803ce4690d0dd94e16f118dbd14af045034.tar.gz
[S390] fix io_return critical section cleanup
If a machine check interrupts the io interrupt handler on one of the instructions between io_return and io_leave the critical section cleanup code will move the return psw to io_work_loop. By doing that the switch from the asynchronous interrupt stack to the process stack is skipped. If e.g. TIF_NEED_RESCHED is set things break because the scheduler is called with the asynchronous interrupts stack. Moving the psw back to io_return instead fixes the problem. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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0 files changed, 0 insertions, 0 deletions
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