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Commit 72960a02 authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky
Browse files

[S390] New get_cpu_id() inline assembly 



Replace two stidp inline assemblies with one global implementation.

Signed-off-by: default avatarMichael Holzheu <holzheu@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 6c732de2

arch/s390/kernel/early.c

+1 −1
Original line number Diff line number Diff line
@@ -129,7 +129,7 @@ static noinline __init void detect_machine_type(void) 
{

	struct cpuinfo_S390 *cpuinfo = &S390_lowcore.cpu_data;



	asm volatile("stidp %0" : "=m" (S390_lowcore.cpu_data.cpu_id));

	get_cpu_id(&S390_lowcore.cpu_data.cpu_id);



	/* Running under z/VM ? */

	if (cpuinfo->cpu_id.version == 0xff)

arch/s390/kernel/setup.c

+1 −1
Original line number Diff line number Diff line
@@ -106,7 +106,7 @@ void __devinit cpu_init (void) 
        /*

         * Store processor id in lowcore (used e.g. in timer_interrupt)

         */

	asm volatile("stidp %0": "=m" (S390_lowcore.cpu_data.cpu_id));

	get_cpu_id(&S390_lowcore.cpu_data.cpu_id);

        S390_lowcore.cpu_data.cpu_addr = addr;



        /*

include/asm-s390/processor.h

+5 −0
Original line number Diff line number Diff line
@@ -36,6 +36,11 @@ typedef struct 
        unsigned int unused  : 16;

} __attribute__ ((packed)) cpuid_t;



static inline void get_cpu_id(cpuid_t *ptr)

{

	asm volatile("stidp 0(%1)" : "=m" (*ptr) : "a" (ptr));

}



struct cpuinfo_S390

{

        cpuid_t  cpu_id;