[SCSI] zfcp: optimize zfcp_qdio_account

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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>

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Heiko Carstens 2009-08-18 15:43:32 +02:00 • committed by James Bottomley

parent b592e89ac9

commit 41e05a12c7

2 changed files with 6 additions and 7 deletions

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2

drivers/s390/scsi/zfcp_def.h

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11

drivers/s390/scsi/zfcp_qdio.c

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