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s390/pci: cleanup clp inline assembly

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Tell gcc that the memory region pointed to by req will be used (and
changed). Also remove the (now) superfluous memory constraint.

Acked-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Sebastian Ott 2013-01-31 19:53:12 +01:00 committed by Martin Schwidefsky
parent 151a0eb6c8
commit bf4ec24ff8
1 changed files with 6 additions and 5 deletions
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11
arch/s390/pci/pci_clp.c
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@ -19,18 +19,19 @@
* Call Logical Processor
* Retry logic is handled by the caller.
*/
static inline u8 clp_instr(void *req)
static inline u8 clp_instr(void *data)
{
u64 ilpm;
struct { u8 _[CLP_BLK_SIZE]; } *req = data;
u64 ignored;
u8 cc;
asm volatile (
" .insn rrf,0xb9a00000,%[ilpm],%[req],0x0,0x2\n"
" .insn rrf,0xb9a00000,%[ign],%[req],0x0,0x2\n"
" ipm %[cc]\n"
" srl %[cc],28\n"
: [cc] "=d" (cc), [ilpm] "=d" (ilpm)
: [cc] "=d" (cc), [ign] "=d" (ignored), "+m" (*req)
: [req] "a" (req)
: "cc", "memory");
: "cc");
return cc;
}