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(parent: 627ae54) | patch
tile: add <asm/word-at-a-time.h> and enable support functions
authorChris Metcalf <cmetcalf@ezchip.com>
Thu, 30 Apr 2015 19:12:42 +0000 (15:12 -0400)
committerChris Metcalf <cmetcalf@ezchip.com>
Thu, 30 Apr 2015 19:23:37 +0000 (15:23 -0400)
commit5bf6c07a1843813d0065feaaecba622d49148d7e
tree18118d48ffe123ce6f6d3eaa67dba135adafbc1atree | snapshot (tar.gz zip)
parent627ae54854edfbf29d5997015c190de22eef497fcommit | diff
tile: add <asm/word-at-a-time.h> and enable support functions

This change enables the generic strncpy_from_user() and strnlen_user()
using word-at-a-time.h.  The tile implementation is trivial since
both tilepro and tilegx have SIMD operations that do byte-wise
comparisons against immediate zero for each byte, and return an
0x01 byte in each position where there is a 0x00 byte.

Signed-off-by: Chris Metcalf <cmetcalf@ezchip.com>
arch/tile/Kconfig diff | blob | blame | history
arch/tile/include/asm/uaccess.h diff | blob | blame | history
arch/tile/include/asm/word-at-a-time.h [new file with mode: 0644] blob
arch/tile/lib/exports.c diff | blob | blame | history
arch/tile/lib/usercopy_32.S diff | blob | blame | history
arch/tile/lib/usercopy_64.S diff | blob | blame | history