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| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2008-10-10 21:33:22 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2008-10-10 21:33:58 +0200 |
| commit | 5a0d0e65379256b4da2c9092e197a2c761f51c01 (patch) | |
| tree | 4dbac2b5498ad7ce1bd88d8bdfe6303169b9560c /drivers | |
| parent | b2300b9efe1b8174833e17f37e975c9da00c388a (diff) | |
| download | linux-5a0d0e65379256b4da2c9092e197a2c761f51c01.tar.bz2 | |
[S390] Move private simple udelay function to arch/s390/lib/delay.c.
Move cio's private simple udelay function to lib/delay.c and turn it
into something much more readable. So we have all implementations
at one place.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/s390/cio/cio.c | 17 |
1 files changed, 2 insertions, 15 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index c0cb72547256..3db2c386546f 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -859,19 +859,6 @@ __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib) return -EBUSY; /* uhm... */ } -/* we can't use the normal udelay here, since it enables external interrupts */ - -static void udelay_reset(unsigned long usecs) -{ - uint64_t start_cc, end_cc; - - asm volatile ("STCK %0" : "=m" (start_cc)); - do { - cpu_relax(); - asm volatile ("STCK %0" : "=m" (end_cc)); - } while (((end_cc - start_cc)/4096) < usecs); -} - static int __clear_io_subchannel_easy(struct subchannel_id schid) { @@ -887,7 +874,7 @@ __clear_io_subchannel_easy(struct subchannel_id schid) if (schid_equal(&ti.schid, &schid)) return 0; } - udelay_reset(100); + udelay_simple(100); } return -EBUSY; } @@ -895,7 +882,7 @@ __clear_io_subchannel_easy(struct subchannel_id schid) static void __clear_chsc_subchannel_easy(void) { /* It seems we can only wait for a bit here :/ */ - udelay_reset(100); + udelay_simple(100); } static int pgm_check_occured; |