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pmem: kill __pmem address space

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The __pmem address space was meant to annotate codepaths that touch
persistent memory and need to coordinate a call to wmb_pmem().  Now that
wmb_pmem() is gone, there is little need to keep this annotation.

Cc: Christoph Hellwig <hch@lst.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams
2016-06-03 18:06:47 -07:00
parent 7c8a6a7190
commit 7a9eb20666
15 changed files with 56 additions and 102 deletions
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70
include/linux/pmem.h
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@@ -26,37 +26,35 @@
* calling these symbols with arch_has_pmem_api() and redirect to the
* implementation in asm/pmem.h.
*/
static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src,
size_t n)
static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n)
{
BUG();
}
static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src,
size_t n)
static inline int arch_memcpy_from_pmem(void *dst, const void *src, size_t n)
{
BUG();
return -EFAULT;
}
static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes,
static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes,
struct iov_iter *i)
{
BUG();
return 0;
}
static inline void arch_clear_pmem(void __pmem *addr, size_t size)
static inline void arch_clear_pmem(void *addr, size_t size)
{
BUG();
}
static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size)
static inline void arch_wb_cache_pmem(void *addr, size_t size)
{
BUG();
}
static inline void arch_invalidate_pmem(void __pmem *addr, size_t size)
static inline void arch_invalidate_pmem(void *addr, size_t size)
{
BUG();
}
@@ -67,13 +65,6 @@ static inline bool arch_has_pmem_api(void)
return IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API);
}
static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src,
size_t size)
{
memcpy(dst, (void __force *) src, size);
return 0;
}
/*
* memcpy_from_pmem - read from persistent memory with error handling
* @dst: destination buffer
@@ -82,40 +73,13 @@ static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src,
*
* Returns 0 on success negative error code on failure.
*/
static inline int memcpy_from_pmem(void *dst, void __pmem const *src,
size_t size)
static inline int memcpy_from_pmem(void *dst, void const *src, size_t size)
{
if (arch_has_pmem_api())
return arch_memcpy_from_pmem(dst, src, size);
else
return default_memcpy_from_pmem(dst, src, size);
}
/*
* These defaults seek to offer decent performance and minimize the
* window between i/o completion and writes being durable on media.
* However, it is undefined / architecture specific whether
* ARCH_MEMREMAP_PMEM + default_memcpy_to_pmem is sufficient for
* making data durable relative to i/o completion.
*/
static inline void default_memcpy_to_pmem(void __pmem *dst, const void *src,
size_t size)
{
memcpy((void __force *) dst, src, size);
}
static inline size_t default_copy_from_iter_pmem(void __pmem *addr,
size_t bytes, struct iov_iter *i)
{
return copy_from_iter_nocache((void __force *)addr, bytes, i);
}
static inline void default_clear_pmem(void __pmem *addr, size_t size)
{
if (size == PAGE_SIZE && ((unsigned long)addr & ~PAGE_MASK) == 0)
clear_page((void __force *)addr);
else
memset((void __force *)addr, 0, size);
memcpy(dst, src, size);
return 0;
}
/**
@@ -130,12 +94,12 @@ static inline void default_clear_pmem(void __pmem *addr, size_t size)
* data may still reside in cpu or platform buffers, so this operation
* must be followed by a blkdev_issue_flush() on the pmem block device.
*/
static inline void memcpy_to_pmem(void __pmem *dst, const void *src, size_t n)
static inline void memcpy_to_pmem(void *dst, const void *src, size_t n)
{
if (arch_has_pmem_api())
arch_memcpy_to_pmem(dst, src, n);
else
default_memcpy_to_pmem(dst, src, n);
memcpy(dst, src, n);
}
/**
@@ -147,12 +111,12 @@ static inline void memcpy_to_pmem(void __pmem *dst, const void *src, size_t n)
* Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'.
* See blkdev_issue_flush() note for memcpy_to_pmem().
*/
static inline size_t copy_from_iter_pmem(void __pmem *addr, size_t bytes,
static inline size_t copy_from_iter_pmem(void *addr, size_t bytes,
struct iov_iter *i)
{
if (arch_has_pmem_api())
return arch_copy_from_iter_pmem(addr, bytes, i);
return default_copy_from_iter_pmem(addr, bytes, i);
return copy_from_iter_nocache(addr, bytes, i);
}
/**
@@ -163,12 +127,12 @@ static inline size_t copy_from_iter_pmem(void __pmem *addr, size_t bytes,
* Write zeros into the memory range starting at 'addr' for 'size' bytes.
* See blkdev_issue_flush() note for memcpy_to_pmem().
*/
static inline void clear_pmem(void __pmem *addr, size_t size)
static inline void clear_pmem(void *addr, size_t size)
{
if (arch_has_pmem_api())
arch_clear_pmem(addr, size);
else
default_clear_pmem(addr, size);
memset(addr, 0, size);
}
/**
@@ -179,7 +143,7 @@ static inline void clear_pmem(void __pmem *addr, size_t size)
* For platforms that support clearing poison this flushes any poisoned
* ranges out of the cache
*/
static inline void invalidate_pmem(void __pmem *addr, size_t size)
static inline void invalidate_pmem(void *addr, size_t size)
{
if (arch_has_pmem_api())
arch_invalidate_pmem(addr, size);
@@ -193,7 +157,7 @@ static inline void invalidate_pmem(void __pmem *addr, size_t size)
* Write back the processor cache range starting at 'addr' for 'size' bytes.
* See blkdev_issue_flush() note for memcpy_to_pmem().
*/
static inline void wb_cache_pmem(void __pmem *addr, size_t size)
static inline void wb_cache_pmem(void *addr, size_t size)
{
if (arch_has_pmem_api())
arch_wb_cache_pmem(addr, size);