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authorWill Deacon <will.deacon@arm.com>2012-07-06 15:45:39 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-07-09 17:41:11 +0100
commit8c56cc8be5b38e3684eba96dc9b3f7ca7e495755 (patch)
treeeccb882c8c5f1cc81fc226c769fc9ec99a45145b /arch/arm/lib/Makefile
parent4295b898f5a5c7e62ae68e7a4ecc4b414622ffe6 (diff)
ARM: 7449/1: use generic strnlen_user and strncpy_from_user functions
This patch implements the word-at-a-time interface for ARM using the same algorithm as x86. We use the fls macro from ARMv5 onwards, where we have a clz instruction available which saves us a mov instruction when targetting Thumb-2. For older CPUs, we use the magic 0x0ff0001 constant. Big-endian configurations make use of the implementation from asm-generic. With this implemented, we can replace our byte-at-a-time strnlen_user and strncpy_from_user functions with the optimised generic versions. Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/lib/Makefile')
-rw-r--r--arch/arm/lib/Makefile1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/arm/lib/Makefile b/arch/arm/lib/Makefile
index 992769ae2599..d5060dab6e52 100644
--- a/arch/arm/lib/Makefile
+++ b/arch/arm/lib/Makefile
@@ -8,7 +8,6 @@ lib-y := backtrace.o changebit.o csumipv6.o csumpartial.o \
csumpartialcopy.o csumpartialcopyuser.o clearbit.o \
delay.o findbit.o memchr.o memcpy.o \
memmove.o memset.o memzero.o setbit.o \
- strncpy_from_user.o strnlen_user.o \
strchr.o strrchr.o \
testchangebit.o testclearbit.o testsetbit.o \
ashldi3.o ashrdi3.o lshrdi3.o muldi3.o \