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Diffstat (limited to '')
-rw-r--r-- | arch/powerpc/lib/checksum_wrappers.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/arch/powerpc/lib/checksum_wrappers.c b/arch/powerpc/lib/checksum_wrappers.c new file mode 100644 index 000000000..1a14c8780 --- /dev/null +++ b/arch/powerpc/lib/checksum_wrappers.c @@ -0,0 +1,39 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * Copyright (C) IBM Corporation, 2010 + * + * Author: Anton Blanchard <anton@au.ibm.com> + */ +#include <linux/export.h> +#include <linux/compiler.h> +#include <linux/types.h> +#include <asm/checksum.h> +#include <linux/uaccess.h> + +__wsum csum_and_copy_from_user(const void __user *src, void *dst, + int len) +{ + __wsum csum; + + if (unlikely(!user_read_access_begin(src, len))) + return 0; + + csum = csum_partial_copy_generic((void __force *)src, dst, len); + + user_read_access_end(); + return csum; +} + +__wsum csum_and_copy_to_user(const void *src, void __user *dst, int len) +{ + __wsum csum; + + if (unlikely(!user_write_access_begin(dst, len))) + return 0; + + csum = csum_partial_copy_generic(src, (void __force *)dst, len); + + user_write_access_end(); + return csum; +} |