在 2022/4/12 19:49, Kefeng Wang 写道:
On 2022/4/12 15:25, Tong Tiangen wrote:
X86 has it's implementation of copy_mc_to_user but not use #define to
declare.
This may cause problems, for example, if other architectures open
CONFIG_ARCH_HAS_COPY_MC, but want to use copy_mc_to_user() outside the
architecture, the code add to include/linux/uaddess.h is as follows:
#ifndef copy_mc_to_user
static inline unsigned long __must_check
copy_mc_to_user(void *dst, const void *src, size_t cnt)
{
...
}
#endif
Then this definition will conflict with the implementation of X86 and
cause
compilation errors.
Does powerpc need this define?
Oh, missing that, will do next version.
Fixes: ec6347bb4339 ("x86, powerpc: Rename memcpy_mcsafe() to
copy_mc_to_{user, kernel}()")
Signed-off-by: Tong Tiangen <tongtiangen@xxxxxxxxxx>
---
arch/x86/include/asm/uaccess.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/include/asm/uaccess.h
b/arch/x86/include/asm/uaccess.h
index f78e2b3501a1..e18c5f098025 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -415,6 +415,7 @@ copy_mc_to_kernel(void *to, const void *from,
unsigned len);
unsigned long __must_check
copy_mc_to_user(void *to, const void *from, unsigned len);
+#define copy_mc_to_user copy_mc_to_user
#endif
/*
.
