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[S390] Inline assembly cleanup.

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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>
This commit is contained in:
Martin Schwidefsky
2006-09-28 16:56:43 +02:00
parent 25d83cbfaa
commit 94c12cc7d1
51 changed files with 1758 additions and 2268 deletions
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38
drivers/s390/cio/device_id.c
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@@ -42,18 +42,15 @@ diag210(struct diag210 * addr)
spin_lock_irqsave(&diag210_lock, flags);
diag210_tmp = *addr;
asm volatile (
" lhi %0,-1\n"
" sam31\n"
" diag %1,0,0x210\n"
"0: ipm %0\n"
" srl %0,28\n"
"1: sam64\n"
".section __ex_table,\"a\"\n"
" .align 8\n"
" .quad 0b,1b\n"
".previous"
: "=&d" (ccode) : "a" (__pa(&diag210_tmp)) : "cc", "memory" );
asm volatile(
" lhi %0,-1\n"
" sam31\n"
" diag %1,0,0x210\n"
"0: ipm %0\n"
" srl %0,28\n"
"1: sam64\n"
EX_TABLE(0b,1b)
: "=&d" (ccode) : "a" (__pa(&diag210_tmp)) : "cc", "memory");
*addr = diag210_tmp;
spin_unlock_irqrestore(&diag210_lock, flags);
@@ -66,17 +63,14 @@ diag210(struct diag210 * addr)
{
int ccode;
asm volatile (
" lhi %0,-1\n"
" diag %1,0,0x210\n"
"0: ipm %0\n"
" srl %0,28\n"
asm volatile(
" lhi %0,-1\n"
" diag %1,0,0x210\n"
"0: ipm %0\n"
" srl %0,28\n"
"1:\n"
".section __ex_table,\"a\"\n"
" .align 4\n"
" .long 0b,1b\n"
".previous"
: "=&d" (ccode) : "a" (__pa(addr)) : "cc", "memory" );
EX_TABLE(0b,1b)
: "=&d" (ccode) : "a" (__pa(addr)) : "cc", "memory");
return ccode;
}