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[SCSI] zfcp: optimize zfcp_qdio_account
authorHeiko Carstens <heiko.carstens@de.ibm.com>
Tue, 18 Aug 2009 13:43:32 +0000 (15:43 +0200)
committerJames Bottomley <James.Bottomley@suse.de>
Sat, 5 Sep 2009 13:49:49 +0000 (08:49 -0500)
commit41e05a12c7aae16f0381103af3e5ca791e87ce59
tree3db57f11d9f2183215a52796fea113ce96b5abd8tree | snapshot (tar.gz zip)
parentb592e89ac9af521be164490e45c53c93e89c776fcommit | diff
[SCSI] zfcp: optimize zfcp_qdio_account

Remove expensive ktime_get()/ktime_us_delta() functions from the hot
path and use get_clock_monotonic() instead. This elimates seven
function calls and avoids a lot of unnecessary calculations.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
drivers/s390/scsi/zfcp_def.h diff | blob | blame | history
drivers/s390/scsi/zfcp_qdio.c diff | blob | blame | history