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s390/pci: cleanup clp inline assembly
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>
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1 changed files with 6 additions and 5 deletions
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@ -19,18 +19,19 @@
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* Call Logical Processor
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* Retry logic is handled by the caller.
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*/
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static inline u8 clp_instr(void *req)
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static inline u8 clp_instr(void *data)
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{
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u64 ilpm;
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struct { u8 _[CLP_BLK_SIZE]; } *req = data;
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u64 ignored;
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u8 cc;
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asm volatile (
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" .insn rrf,0xb9a00000,%[ilpm],%[req],0x0,0x2\n"
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" .insn rrf,0xb9a00000,%[ign],%[req],0x0,0x2\n"
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" ipm %[cc]\n"
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" srl %[cc],28\n"
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: [cc] "=d" (cc), [ilpm] "=d" (ilpm)
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: [cc] "=d" (cc), [ign] "=d" (ignored), "+m" (*req)
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: [req] "a" (req)
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: "cc", "memory");
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: "cc");
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return cc;
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}
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