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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 11:06:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-26 11:33:53 -0700
commita08c5356a3aaf638c41897ae4169de18db89595e (patch)
treefe0d1cb48a26cc000c199d484a139799d559a178 /lib/Kconfig
parent36126f8f2ed8168eb13aa0662b9b9585cba100a9 (diff)
downloadlinux-a08c5356a3aaf638c41897ae4169de18db89595e.tar.gz
lib: add generic strnlen_user() function
This adds a new generic optimized strnlen_user() function that uses the <asm/word-at-a-time.h> infrastructure to portably do efficient string handling. In many ways, strnlen is much simpler than strncpy, and in particular we can always pre-align the words we load from memory. That means that all the worries about alignment etc are a non-issue, so this one can easily be used on any architecture. You obviously do have to do the appropriate word-at-a-time.h macros. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/Kconfig')
-rw-r--r--lib/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 98230ac3db2..64ddc44d0b8 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -19,6 +19,9 @@ config RATIONAL
config GENERIC_STRNCPY_FROM_USER
bool
+config GENERIC_STRNLEN_USER
+ bool
+
config GENERIC_FIND_FIRST_BIT
bool