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pmem, x86: clean up conditional pmem includes 

Prior to this change x86_64 used the pmem defines in
arch/x86/include/asm/pmem.h, and UM used the default ones at the
top of include/linux/pmem.h.  The inclusion or exclusion in linux/pmem.h
was controlled by CONFIG_ARCH_HAS_PMEM_API, but the ones in asm/pmem.h
were controlled by ARCH_HAS_NOCACHE_UACCESS.

Instead, control them both with CONFIG_ARCH_HAS_PMEM_API so that it's
clear that they are related and we don't run into the possibility where
they are both included or excluded.  Also remove a bunch of stale
function prototypes meant for UM in asm/pmem.h - these just conflicted
with the inline defaults in linux/pmem.h and gave compile errors.

Signed-off-by: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Ross Zwisler 2015-08-18 13:55:38 -06:00 committed by Dan Williams
parent 18279b467a
commit 4a370df553
1 changed files with 2 additions and 11 deletions
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13
arch/x86/include/asm/pmem.h
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@ -18,8 +18,7 @@
#include <asm/cpufeature.h>
#include <asm/special_insns.h>
#ifdef ARCH_HAS_NOCACHE_UACCESS
#ifdef CONFIG_ARCH_HAS_PMEM_API
/**
* arch_memcpy_to_pmem - copy data to persistent memory
* @dst: destination buffer for the copy
@ -79,14 +78,6 @@ static inline bool arch_has_wmb_pmem(void)
return false;
#endif
}
#else /* ARCH_HAS_NOCACHE_UACCESS i.e. ARCH=um */
extern void arch_memcpy_to_pmem(void __pmem *dst, const void *src, size_t n);
extern void arch_wmb_pmem(void);
static inline bool __arch_has_wmb_pmem(void)
{
return false;
}
#endif
#endif /* CONFIG_ARCH_HAS_PMEM_API */
#endif /* __ASM_X86_PMEM_H__ */