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uio, lib: Fix CONFIG_ARCH_HAS_UACCESS_MCSAFE compilation

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Add a common Kconfig CONFIG_ARCH_HAS_UACCESS_MCSAFE that archs can
optionally select, and fixup the declaration of _copy_to_iter_mcsafe().

Fixes: 8780356ef6 ("x86/asm/memcpy_mcsafe: Define copy_to_iter_mcsafe()")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2018-05-22 23:17:03 -07:00
parent 8780356ef6
commit 522239b445
2 changed files with 4 additions and 1 deletions
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2
include/linux/uio.h
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@ -155,7 +155,7 @@ size_t _copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i);
#endif
#ifdef CONFIG_ARCH_HAS_UACCESS_MCSAFE
size_t _copy_to_iter_mcsafe(void *addr, size_t bytes, struct iov_iter *i);
size_t _copy_to_iter_mcsafe(const void *addr, size_t bytes, struct iov_iter *i);
#else
#define _copy_to_iter_mcsafe _copy_to_iter
#endif

3
lib/Kconfig
View File

@ -586,6 +586,9 @@ config ARCH_HAS_PMEM_API
config ARCH_HAS_UACCESS_FLUSHCACHE
bool
config ARCH_HAS_UACCESS_MCSAFE
bool
config STACKDEPOT
bool
select STACKTRACE