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Commit bf4ec24f authored by Sebastian Ott's avatar Sebastian Ott Committed by Martin Schwidefsky
Browse files

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: default avatarGerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 151a0eb6

arch/s390/pci/pci_clp.c

+6 −5
Original line number Diff line number Diff line
@@ -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;

}