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| author | Matt Sealey | 2019-03-08 01:30:33 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2019-03-08 03:32:02 +0100 |
| commit | 433b3b3d9f642e37b270cd29aef53cee75ef4a05 (patch) | |
| tree | 4d575729477e87311df6831c305341b95e7dacef /Documentation/lzo.txt | |
| parent | lib/lzo: tidy-up ifdefs (diff) | |
| download | kernel-qcow2-linux-433b3b3d9f642e37b270cd29aef53cee75ef4a05.tar.gz kernel-qcow2-linux-433b3b3d9f642e37b270cd29aef53cee75ef4a05.tar.xz kernel-qcow2-linux-433b3b3d9f642e37b270cd29aef53cee75ef4a05.zip | |
lib/lzo: 64-bit CTZ on arm64
LZO leaves some performance on the table by not realising that arm64 can
optimize count-trailing-zeros bit operations.
Add CONFIG_ARM64 to the checked definitions alongside CONFIG_X86_64 to
enable the use of rbit/clz instructions on full 64-bit quantities.
Link: http://lkml.kernel.org/r/20181127161913.23863-5-dave.rodgman@arm.com
Link: http://lkml.kernel.org/r/20190205141950.9058-3-dave.rodgman@arm.com
Signed-off-by: Matt Sealey <matt.sealey@arm.com>
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Markus F.X.J. Oberhumer <markus@oberhumer.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <nitingupta910@gmail.com>
Cc: Richard Purdie <rpurdie@openedhand.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Sonny Rao <sonnyrao@google.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/lzo.txt')
0 files changed, 0 insertions, 0 deletions