kernel/linux.git/arch/mips/include/asm/checksum.h, branch linux-4.4.y

MIPS: Fix special case in 64 bit IP checksumming.

2017-03-12T05:37:23+00:00

commit 66fd848cadaa6be974a8c780fbeb328f0af4d3bd upstream. For certain arguments such as saddr = 0xc0a8fd60, daddr = 0xc0a8fda1, len = 80, proto = 17, sum = 0x7eae049d there will be a carry when folding the intermediate 64 bit checksum to 32 bit but the code doesn't add the carry back to the one's complement sum, thus an incorrect result will be generated. Reported-by: Mark Zhang Signed-off-by: Ralf Baechle Reviewed-by: James Hogan Signed-off-by: James Hogan Signed-off-by: Greg Kroah-Hartman

MIPS: LLVMLinux: Fix an 'inline asm input/output type mismatch' error.

2015-04-01T15:21:47+00:00

Replace incorrect matching constraint that caused the error with an alternative that still has the required constraints on the inline assembly. This is the error message reported by clang: arch/mips/include/asm/checksum.h:285:27: error: unsupported inline asm: input with type '__be32' (aka 'unsigned int') matching output with type 'unsigned short' "0" (htonl(len)), "1" (htonl(proto)), "r" (sum)); ^~~~~~~~~~~~ The changed code can be compiled successfully by both gcc and clang. Signed-off-by: Daniel Sanders Signed-off-by: Toma Tabacu Suggested-by: Maciej W. Rozycki Cc: Ralf Baechle Cc: Markos Chandras Cc: Leonid Yegoshin Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/9313/ Signed-off-by: Ralf Baechle

MIPS: Use generic checksum functions for MIPS R6

2015-02-17T15:37:19+00:00

The following instructions have been removed from MIPS R6 ulw, ulh, swl, lwr, lwl, swr. However, all of them are used in the MIPS specific checksum implementation. As a result of which, we will use the generic checksum on MIPS R6 Signed-off-by: Markos Chandras

MIPS: Use generic csum_tcpudp_magic for MIPS.

2015-01-13T15:04:27+00:00

Its implementation is identical to MIPS. Signed-off-by: Ralf Baechle

MIPS: Use

2015-01-13T15:04:27+00:00

Right now the MIPS still overrides all functions. This will change in the future. Signed-off-by: Ralf Baechle

MIPS: Rewrite csum_fold to plain C.

2015-01-13T15:04:27+00:00

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: Ralf Baechle

MIPS: asm: checksum: Add MIPS specific csum_and_copy_from_user function

2014-03-26T22:09:17+00:00

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 Signed-off-by: Markos Chandras

MIPS: asm: checksum: Split kernel and user copy operations

2014-03-26T22:09:17+00:00

In EVA mode, different instructions need to be used to read/write from kernel and userland. In non-EVA mode, there is no functional difference. The current address limit is checked to decide the type of operation that will be performed. Signed-off-by: Leonid Yegoshin Signed-off-by: Markos Chandras

MIPS: checksum: Split the 'copy_user' symbol

2014-03-26T22:09:17+00:00

The 'copy_user' symbol can be used to copy from or to userland so we will use two different symbols for these operations. This makes no difference in the existing code, but when the core is operating in EVA mode, different instructions need to be used to read and write to userland address space. The old function has also been renamed to 'copy_kernel' to denote that it is suitable for copy data to and from kernel space. Signed-off-by: Markos Chandras

MIPS: Whitespace cleanup.

2013-02-01T09:00:22+00:00

Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle