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Subject[PATCH 07/13] x86, libnvdimm, pmem: move arch_invalidate_pmem() to libnvdimm
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Kill this globally defined wrapper and move to libnvdimm so that we can
ultimately remove the public pmem api.

Cc: <x86@kernel.org>
Cc: Jan Kara <jack@suse.cz>
Cc: Jeff Moyer <jmoyer@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Matthew Wilcox <mawilcox@microsoft.com>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
arch/x86/include/asm/pmem.h | 4 ----
drivers/nvdimm/claim.c | 3 ++-
drivers/nvdimm/pmem.c | 2 +-
drivers/nvdimm/pmem.h | 4 ++++
drivers/nvdimm/x86.c | 6 ++++++
include/linux/pmem.h | 19 -------------------
6 files changed, 13 insertions(+), 25 deletions(-)

diff --git a/arch/x86/include/asm/pmem.h b/arch/x86/include/asm/pmem.h
index 4759a179aa52..ded2541a7ba9 100644
--- a/arch/x86/include/asm/pmem.h
+++ b/arch/x86/include/asm/pmem.h
@@ -44,9 +44,5 @@ static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n)
BUG();
}

-static inline void arch_invalidate_pmem(void *addr, size_t size)
-{
- clflush_cache_range(addr, size);
-}
#endif /* CONFIG_ARCH_HAS_PMEM_API */
#endif /* __ASM_X86_PMEM_H__ */
diff --git a/drivers/nvdimm/claim.c b/drivers/nvdimm/claim.c
index 61293504b52c..dca2a15dc01d 100644
--- a/drivers/nvdimm/claim.c
+++ b/drivers/nvdimm/claim.c
@@ -14,6 +14,7 @@
#include <linux/sizes.h>
#include <linux/pmem.h>
#include "nd-core.h"
+#include "pmem.h"
#include "pfn.h"
#include "btt.h"
#include "nd.h"
@@ -253,7 +254,7 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns,
cleared /= 512;
badblocks_clear(&nsio->bb, sector, cleared);
}
- invalidate_pmem(nsio->addr + offset, size);
+ arch_invalidate_pmem(nsio->addr + offset, size);
} else
rc = -EIO;
}
diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c
index 838241bb31d1..d551bd2ef9dd 100644
--- a/drivers/nvdimm/pmem.c
+++ b/drivers/nvdimm/pmem.c
@@ -68,7 +68,7 @@ static int pmem_clear_poison(struct pmem_device *pmem, phys_addr_t offset,
badblocks_clear(&pmem->bb, sector, cleared);
}

- invalidate_pmem(pmem->virt_addr + offset, len);
+ arch_invalidate_pmem(pmem->virt_addr + offset, len);

return rc;
}
diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h
index 4faacff434ff..02f94e1f14ea 100644
--- a/drivers/nvdimm/pmem.h
+++ b/drivers/nvdimm/pmem.h
@@ -10,10 +10,14 @@ long pmem_direct_access(struct block_device *bdev, sector_t sector,

#ifdef CONFIG_ARCH_HAS_PMEM_API
void arch_wb_cache_pmem(void *addr, size_t size);
+void arch_invalidate_pmem(void *addr, size_t size);
#else
static inline void arch_wb_cache_pmem(void *addr, size_t size)
{
}
+static inline void arch_invalidate_pmem(void *addr, size_t size)
+{
+}
#endif

/* this definition is in it's own header for tools/testing/nvdimm to consume */
diff --git a/drivers/nvdimm/x86.c b/drivers/nvdimm/x86.c
index 79d7267da4d2..07478ed7ce97 100644
--- a/drivers/nvdimm/x86.c
+++ b/drivers/nvdimm/x86.c
@@ -34,3 +34,9 @@ void arch_wb_cache_pmem(void *addr, size_t size)
clwb(p);
}
EXPORT_SYMBOL_GPL(arch_wb_cache_pmem);
+
+void arch_invalidate_pmem(void *addr, size_t size)
+{
+ clflush_cache_range(addr, size);
+}
+EXPORT_SYMBOL_GPL(arch_invalidate_pmem);
diff --git a/include/linux/pmem.h b/include/linux/pmem.h
index 33ae761f010a..559c00848583 100644
--- a/include/linux/pmem.h
+++ b/include/linux/pmem.h
@@ -30,11 +30,6 @@ static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n)
{
BUG();
}
-
-static inline void arch_invalidate_pmem(void *addr, size_t size)
-{
- BUG();
-}
#endif

static inline bool arch_has_pmem_api(void)
@@ -61,18 +56,4 @@ static inline void memcpy_to_pmem(void *dst, const void *src, size_t n)
else
memcpy(dst, src, n);
}
-
-/**
- * invalidate_pmem - flush a pmem range from the cache hierarchy
- * @addr: virtual start address
- * @size: bytes to invalidate (internally aligned to cache line size)
- *
- * For platforms that support clearing poison this flushes any poisoned
- * ranges out of the cache
- */
-static inline void invalidate_pmem(void *addr, size_t size)
-{
- if (arch_has_pmem_api())
- arch_invalidate_pmem(addr, size);
-}
#endif /* __PMEM_H__ */
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