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s390/barrier: factor out bcr_serialize() 

Factor out bcr_serialize() inline assembly function which describes
what the bcr instruction is used for.
Use bcr_serialize() like before in mb(), but also in upcoming changes.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2021-10-01 12:56:55 +02:00 committed by Vasily Gorbik
parent 25d36a85c6
commit fbbd140737
1 changed files with 14 additions and 10 deletions
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24
arch/s390/include/asm/barrier.h
View File

@ -16,20 +16,24 @@
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
/* Fast-BCR without checkpoint synchronization */
#define __ASM_BARRIER "bcr 14,0\n"
#define __ASM_BCR_SERIALIZE "bcr 14,0\n"
#else
#define __ASM_BARRIER "bcr 15,0\n"
#define __ASM_BCR_SERIALIZE "bcr 15,0\n"
#endif
#define mb() do { asm volatile(__ASM_BARRIER : : : "memory"); } while (0)
static __always_inline void bcr_serialize(void)
{
asm volatile(__ASM_BCR_SERIALIZE : : : "memory");
}
#define rmb() barrier()
#define wmb() barrier()
#define dma_rmb() mb()
#define dma_wmb() mb()
#define __smp_mb() mb()
#define __smp_rmb() rmb()
#define __smp_wmb() wmb()
#define mb() bcr_serialize()
#define rmb() barrier()
#define wmb() barrier()
#define dma_rmb() mb()
#define dma_wmb() mb()
#define __smp_mb() mb()
#define __smp_rmb() rmb()
#define __smp_wmb() wmb()
#define __smp_store_release(p, v) \
do { \