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| author | Will Deacon <will.deacon@arm.com> | 2013-11-06 18:20:22 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-12-19 18:43:06 +0100 |
| commit | 12a0ef7b0ac38677bd2d85f33df5ca0a57868819 (patch) | |
| tree | 59b4be2d48b136aac65c7201a975a9463917e020 /arch/arm64/kernel/arm64ksyms.c | |
| parent | arm64: percpu: implement optimised pcpu access using tpidr_el1 (diff) | |
| download | linux-12a0ef7b0ac38677bd2d85f33df5ca0a57868819.tar.xz linux-12a0ef7b0ac38677bd2d85f33df5ca0a57868819.zip | |
arm64: use generic strnlen_user and strncpy_from_user functions
This patch implements the word-at-a-time interface for arm64 using the
same algorithm as ARM. We use the fls64 macro, which expands to a clz
instruction via a compiler builtin. 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.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/kernel/arm64ksyms.c')
| -rw-r--r-- | arch/arm64/kernel/arm64ksyms.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/arch/arm64/kernel/arm64ksyms.c b/arch/arm64/kernel/arm64ksyms.c index e7ee770c0697..338b568cd8ae 100644 --- a/arch/arm64/kernel/arm64ksyms.c +++ b/arch/arm64/kernel/arm64ksyms.c @@ -29,13 +29,10 @@ #include <asm/checksum.h> - /* user mem (segment) */ -EXPORT_SYMBOL(__strnlen_user); -EXPORT_SYMBOL(__strncpy_from_user); - EXPORT_SYMBOL(copy_page); EXPORT_SYMBOL(clear_page); + /* user mem (segment) */ EXPORT_SYMBOL(__copy_from_user); EXPORT_SYMBOL(__copy_to_user); EXPORT_SYMBOL(__clear_user); |