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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/Makefile
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/Makefile')
-rw-r--r--lib/Makefile1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/Makefile b/lib/Makefile
index b98df505f33..77937a7dd5c 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -126,6 +126,7 @@ obj-$(CONFIG_CLZ_TAB) += clz_tab.o
obj-$(CONFIG_DDR) += jedec_ddr_data.o
obj-$(CONFIG_GENERIC_STRNCPY_FROM_USER) += strncpy_from_user.o
+obj-$(CONFIG_GENERIC_STRNLEN_USER) += strnlen_user.o
hostprogs-y := gen_crc32table
clean-files := crc32table.h