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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-28 16:56:43 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-09-28 16:56:43 +0200
commit94c12cc7d196bab34aaa98d38521549fa1e5ef76 (patch)
tree8e0cec0ed44445d74a2cb5160303d6b4dfb1bc31 /arch/s390/lib/delay.c
parent25d83cbfaa44e1b9170c0941c3ef52ca39f54ccc (diff)
[S390] Inline assembly cleanup.
Major cleanup of all s390 inline assemblies. They now have a common coding style. Quite a few have been shortened, mainly by using register asm variables. Use of the EX_TABLE macro helps as well. The atomic ops, bit ops and locking inlines new use the Q-constraint if a newer gcc is used. That results in slightly better code. Thanks to Christian Borntraeger for proof reading the changes. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/lib/delay.c')
-rw-r--r--arch/s390/lib/delay.c11
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/s390/lib/delay.c b/arch/s390/lib/delay.c
index 468f4ea33f9..027c4742a00 100644
--- a/arch/s390/lib/delay.c
+++ b/arch/s390/lib/delay.c
@@ -27,9 +27,7 @@ void __delay(unsigned long loops)
* yield the megahertz number of the cpu. The important function
* is udelay and that is done using the tod clock. -- martin.
*/
- __asm__ __volatile__(
- "0: brct %0,0b"
- : /* no outputs */ : "r" ((loops/2) + 1));
+ asm volatile("0: brct %0,0b" : : "d" ((loops/2) + 1));
}
/*
@@ -38,13 +36,12 @@ void __delay(unsigned long loops)
*/
void __udelay(unsigned long usecs)
{
- uint64_t start_cc, end_cc;
+ uint64_t start_cc;
if (usecs == 0)
return;
- asm volatile ("STCK %0" : "=m" (start_cc));
+ start_cc = get_clock();
do {
cpu_relax();
- asm volatile ("STCK %0" : "=m" (end_cc));
- } while (((end_cc - start_cc)/4096) < usecs);
+ } while (((get_clock() - start_cc)/4096) < usecs);
}