| Message ID | 20230314153700.787701-1-mark.rutland@arm.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | arm64: asm improvements | expand |
On Tue, 14 Mar 2023 15:36:56 +0000, Mark Rutland wrote: > This series contains a few minor asm cleanups/improvements I've > collected since the last cycle, one of which was previously posted on > its own [1], hence sending as a v2. > > Largely, this is simplifying/relaxing constraints to allow for better > code generation. The cmpxchg patch also drops some C code that's made > redundant with the relaxed constraints. > > [...] Applied to arm64 (for-next/asm), thanks! [1/4] arm64: atomics: lse: improve cmpxchg implementation https://git.kernel.org/arm64/c/e5cacb540fd2 [2/4] arm64: uaccess: permit __smp_store_release() to use zero register https://git.kernel.org/arm64/c/39c8275de81c [3/4] arm64: uaccess: permit put_{user,kernel} to use zero register https://git.kernel.org/arm64/c/4a3f806eca09 [4/4] arm64: uaccess: remove unnecessary earlyclobber https://git.kernel.org/arm64/c/172420865b29 Cheers,
This series contains a few minor asm cleanups/improvements I've collected since the last cycle, one of which was previously posted on its own [1], hence sending as a v2. Largely, this is simplifying/relaxing constraints to allow for better code generation. The cmpxchg patch also drops some C code that's made redundant with the relaxed constraints. Since v1: * Accumulate uaccess asm patches * lse/cmpxchg: allow use of [WX]ZR for 'new' * lse/cmpxchg: cleanup commit message [1] https://lore.kernel.org/linux-arm-kernel/20230206115852.265006-1-mark.rutland@arm.com/ I've given these basic boot testing atop v6.3-rc2 under QEMU TCG mode. Thanks, Mark. Mark Rutland (4): arm64: atomics: lse: improve cmpxchg implementation arm64: uaccess: permit __smp_store_release() to use zero register arm64: uaccess: permit put_{user,kernel} to use zero register arm64: uaccess: remove unnecessary earlyclobber arch/arm64/include/asm/atomic_lse.h | 17 +++++------------ arch/arm64/include/asm/barrier.h | 10 +++++----- arch/arm64/include/asm/uaccess.h | 4 ++-- 3 files changed, 12 insertions(+), 19 deletions(-)