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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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21
arch/s390/kernel/ipl.c
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@@ -120,24 +120,15 @@ static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
static int diag308(unsigned long subcode, void *addr)
{
register unsigned long _addr asm("0") = (unsigned long)addr;
register unsigned long _addr asm("0") = (unsigned long) addr;
register unsigned long _rc asm("1") = 0;
asm volatile (
" diag %0,%2,0x308\n"
"0: \n"
".section __ex_table,\"a\"\n"
#ifdef CONFIG_64BIT
" .align 8\n"
" .quad 0b, 0b\n"
#else
" .align 4\n"
" .long 0b, 0b\n"
#endif
".previous\n"
asm volatile(
" diag %0,%2,0x308\n"
"0:\n"
EX_TABLE(0b,0b)
: "+d" (_addr), "+d" (_rc)
: "d" (subcode) : "cc", "memory" );
: "d" (subcode) : "cc", "memory");
return _rc;
}