x86/powerpc has it's implementation of copy_mc_to_user(), we add generic
fallback in include/linux/uaccess.h prepare for other architechures to
enable CONFIG_ARCH_HAS_COPY_MC.
Signed-off-by: Tong Tiangen <tongtiangen@xxxxxxxxxx>
Acked-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
arch/powerpc/include/asm/uaccess.h | 1 +
arch/x86/include/asm/uaccess.h | 1 +
include/linux/uaccess.h | 8 ++++++++
3 files changed, 10 insertions(+)
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 4f5a46a77fa2..44476d66ed13 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -403,6 +403,7 @@ copy_mc_to_user(void __user *to, const void *from, unsigned long n)
return n;
}
+#define copy_mc_to_user copy_mc_to_user
#endif
extern long __copy_from_user_flushcache(void *dst, const void __user *src,
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 3a7755c1a441..3db67f44063b 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -497,6 +497,7 @@ copy_mc_to_kernel(void *to, const void *from, unsigned len);
unsigned long __must_check
copy_mc_to_user(void __user *to, const void *from, unsigned len);
+#define copy_mc_to_user copy_mc_to_user
#endif
/*
diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h
index e9c702c1908d..9d8c9f8082ff 100644
--- a/include/linux/uaccess.h
+++ b/include/linux/uaccess.h
@@ -239,6 +239,14 @@ copy_mc_to_kernel(void *dst, const void *src, size_t cnt)
}
#endif
+#ifndef copy_mc_to_user
+static inline unsigned long __must_check
+copy_mc_to_user(void *dst, const void *src, size_t cnt)
+{
+ return copy_to_user(dst, src, cnt);
+}
+#endif
+
static __always_inline void pagefault_disabled_inc(void)
{
current->pagefault_disabled++;
--
2.25.1
