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[S390] system call optimization.
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Tue, 10 Jul 2007 09:24:18 +0000 (11:24 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Tue, 10 Jul 2007 09:24:51 +0000 (11:24 +0200)
commit9ff53c0d5f7a7a526950a91664fc84bc2f4fddb5
tree5597a511a31647acd7a11160d9db60a53f388d80tree | snapshot
parent6b73bfe0a8b7060d28f728c28b073c4aa489db20commit | diff
[S390] system call optimization.

After the in-kernel system call has been remove the system call path
can be optimized. The problem state bit of the old psw is always set
between system_call and sysc_do_svc. SAVE_ALL_SVC uses this information
to avoid two instructions.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
arch/s390/kernel/entry.S diff | blob | history
arch/s390/kernel/entry64.S diff | blob | history
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