MIPS: asm: checksum: Add MIPS specific csum_and_copy_from_user function
A MIPS specific csum_and_copy_from_user function is necessary because
the generic one from include/net/checksum.h will not work for EVA.
This is because the generic one will link to symbols from lib/checksum.c
which are not EVA aware.
Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
diff --git a/arch/mips/include/asm/checksum.h b/arch/mips/include/asm/checksum.h
index f5602c6..3418c51 100644
--- a/arch/mips/include/asm/checksum.h
+++ b/arch/mips/include/asm/checksum.h
@@ -54,6 +54,20 @@
len, sum, err_ptr);
}
+#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER
+static inline
+__wsum csum_and_copy_from_user(const void __user *src, void *dst,
+ int len, __wsum sum, int *err_ptr)
+{
+ if (access_ok(VERIFY_READ, src, len))
+ return csum_partial_copy_from_user(src, dst, len, sum,
+ err_ptr);
+ if (len)
+ *err_ptr = -EFAULT;
+
+ return sum;
+}
+
/*
* Copy and checksum to user
*/