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| author |   Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-04 13:13:55 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-07-04 13:13:55 -0700 |
| commit | 404c3bc30cb1361e1b3533643326ab472d24a618 (patch) | |
| tree | 156cc9032c8aee17167d926c5bdae009ba8f36d2 /arch/tile/lib/strlen_64.c | |
| parent | Input: wacom - TPC2FG doesn't store touch id for slots (diff) | |
| parent | Linux 3.5-rc5 (diff) | |
| download | linux-dev-404c3bc30cb1361e1b3533643326ab472d24a618.tar.xz linux-dev-404c3bc30cb1361e1b3533643326ab472d24a618.zip | |
Merge commit 'v3.5-rc5' into next
Diffstat (limited to 'arch/tile/lib/strlen_64.c')
| -rw-r--r-- | arch/tile/lib/strlen_64.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/arch/tile/lib/strlen_64.c b/arch/tile/lib/strlen_64.c index 1c92d46202a8..9583fc3361fa 100644 --- a/arch/tile/lib/strlen_64.c +++ b/arch/tile/lib/strlen_64.c @@ -15,8 +15,7 @@ #include <linux/types.h> #include <linux/string.h> #include <linux/module.h> - -#undef strlen +#include "string-endian.h" size_t strlen(const char *s) { @@ -24,15 +23,13 @@ size_t strlen(const char *s) const uintptr_t s_int = (uintptr_t) s; const uint64_t *p = (const uint64_t *)(s_int & -8); - /* Read the first word, but force bytes before the string to be nonzero. - * This expression works because we know shift counts are taken mod 64. - */ - uint64_t v = *p | ((1ULL << (s_int << 3)) - 1); + /* Read and MASK the first word. */ + uint64_t v = *p | MASK(s_int); uint64_t bits; while ((bits = __insn_v1cmpeqi(v, 0)) == 0) v = *++p; - return ((const char *)p) + (__insn_ctz(bits) >> 3) - s; + return ((const char *)p) + (CFZ(bits) >> 3) - s; } EXPORT_SYMBOL(strlen); |