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| author |   Chris Metcalf <cmetcalf@ezchip.com> | 2015-04-30 15:12:42 -0400 |
|---|---|---|
| committer | Chris Metcalf <cmetcalf@ezchip.com> | 2015-04-30 15:23:37 -0400 |
| commit | 5bf6c07a1843813d0065feaaecba622d49148d7e (patch) | |
| tree | 18118d48ffe123ce6f6d3eaa67dba135adafbc1a /arch/tile/Kconfig | |
| parent | tile: use READ_ONCE() in arch_spin_is_locked() (diff) | |
| download | linux-dev-5bf6c07a1843813d0065feaaecba622d49148d7e.tar.xz linux-dev-5bf6c07a1843813d0065feaaecba622d49148d7e.zip | |
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>
Diffstat (limited to 'arch/tile/Kconfig')
| -rw-r--r-- | arch/tile/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig index a07e31b50d3f..8fac40f56ec7 100644 --- a/arch/tile/Kconfig +++ b/arch/tile/Kconfig @@ -28,6 +28,8 @@ config TILE select HAVE_DEBUG_STACKOVERFLOW select ARCH_WANT_FRAME_POINTERS select HAVE_CONTEXT_TRACKING + select GENERIC_STRNCPY_FROM_USER + select GENERIC_STRNLEN_USER # FIXME: investigate whether we need/want these options. # select HAVE_IOREMAP_PROT |