@@ -44,11 +44,6 @@ 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 *src, size_t n)
-{
- return memcpy_mcsafe(dst, src, n);
-}
-
/**
* arch_wb_cache_pmem - write back a cache range with CLWB
* @vaddr: virtual start address
@@ -79,6 +79,7 @@ int strcmp(const char *cs, const char *ct);
#define memset(s, c, n) __memset(s, c, n)
#endif
+#define __HAVE_ARCH_MEMCPY_MCSAFE 1
__must_check int memcpy_mcsafe_unrolled(void *dst, const void *src, size_t cnt);
DECLARE_STATIC_KEY_FALSE(mcsafe_key);
@@ -1783,8 +1783,7 @@ static int acpi_nfit_blk_single_io(struct nfit_blk *nfit_blk,
mmio_flush_range((void __force *)
mmio->addr.aperture + offset, c);
- memcpy_from_pmem(iobuf + copied,
- mmio->addr.aperture + offset, c);
+ memcpy(iobuf + copied, mmio->addr.aperture + offset, c);
}
copied += c;
@@ -239,7 +239,7 @@ static int nsio_rw_bytes(struct nd_namespace_common *ndns,
if (rw == READ) {
if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align)))
return -EIO;
- return memcpy_from_pmem(buf, nsio->addr + offset, size);
+ return memcpy_mcsafe(buf, nsio->addr + offset, size);
}
if (unlikely(is_bad_pmem(&nsio->bb, sector, sz_align))) {
@@ -89,7 +89,7 @@ static int read_pmem(struct page *page, unsigned int off,
int rc;
void *mem = kmap_atomic(page);
- rc = memcpy_from_pmem(mem + off, pmem_addr, len);
+ rc = memcpy_mcsafe(mem + off, pmem_addr, len);
kunmap_atomic(mem);
if (rc)
return -EIO;
@@ -31,12 +31,6 @@ 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 *src, size_t n)
-{
- BUG();
- return -EFAULT;
-}
-
static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes,
struct iov_iter *i)
{
@@ -65,23 +59,6 @@ static inline bool arch_has_pmem_api(void)
return IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API);
}
-/*
- * memcpy_from_pmem - read from persistent memory with error handling
- * @dst: destination buffer
- * @src: source buffer
- * @size: transfer length
- *
- * Returns 0 on success negative error code on failure.
- */
-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
- memcpy(dst, src, size);
- return 0;
-}
-
/**
* memcpy_to_pmem - copy data to persistent memory
* @dst: destination buffer for the copy
@@ -114,6 +114,14 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
#ifndef __HAVE_ARCH_MEMCHR
extern void * memchr(const void *,int,__kernel_size_t);
#endif
+#ifndef __HAVE_ARCH_MEMCPY_MCSAFE
+static inline __must_check int memcpy_mcsafe(void *dst, const void *src,
+ size_t cnt)
+{
+ memcpy(dst, src, cnt);
+ return 0;
+}
+#endif
void *memchr_inv(const void *s, int c, size_t n);
char *strreplace(char *s, char old, char new);
memcpy_from_pmem() maps directly to memcpy_mcsafe(). The wrapper serves no real benefit aside from affording a more generic function name than the x86-specific 'mcsafe'. However this would not be the first time that x86 terminology leaked into the global namespace. For lack of better name, just use memcpy_mcsafe() directly. This conversion also catches a place where we should have been using plain memcpy, acpi_nfit_blk_single_io(). 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: Tony Luck <tony.luck@intel.com> 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 | 5 ----- arch/x86/include/asm/string_64.h | 1 + drivers/acpi/nfit/core.c | 3 +-- drivers/nvdimm/claim.c | 2 +- drivers/nvdimm/pmem.c | 2 +- include/linux/pmem.h | 23 ----------------------- include/linux/string.h | 8 ++++++++ 7 files changed, 12 insertions(+), 32 deletions(-)