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Commit d0f0f63a authored by Ralf Baechle's avatar Ralf Baechle
Browse files

MIPS: Rewrite csum_fold to plain C. 



This isn't only short and easier to read and fully portable but also
shrinks a Malta kernel's by 160 bytes.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent eaa27f34

arch/mips/include/asm/checksum.h

+8 −14
Original line number Diff line number Diff line
@@ -103,22 +103,16 @@ __wsum csum_partial_copy_nocheck(const void *src, void *dst, 
/*

 *	Fold a partial checksum without adding pseudo headers

 */

static inline __sum16 csum_fold(__wsum sum)

static inline __sum16 csum_fold(__wsum csum)

{

	__asm__(

	"	.set	push		# csum_fold\n"

	"	.set	noat		\n"

	"	sll	$1, %0, 16	\n"

	"	addu	%0, $1		\n"

	"	sltu	$1, %0, $1	\n"

	"	srl	%0, %0, 16	\n"

	"	addu	%0, $1		\n"

	"	xori	%0, 0xffff	\n"

	"	.set	pop"

	: "=r" (sum)

	: "0" (sum));

	u32 sum = (__force u32)csum;;



	sum += (sum << 16);

	csum = (sum < csum);

	sum >>= 16;

	sum += csum;



	return (__force __sum16)sum;

	return (__force __sum16)~sum;

}



/*