Looked at all the patches. Looks good to me.
Reviewed-by: Babu Moger <[email protected]>
On 10/11/2017 1:50 PM, Vijay Kumar wrote:
> SPARC provides lzcnt instruction (with VIS3) which can be used to
> optimize fls, __fls and fls64 functions. For the systems that supports
> lzcnt instruction, we now do boot time patching to use sparc
> optimized fls, __fls and fls64 functions.
>
> v3->v4:
> - Fixed a typo.
> v2->v3:
> - Using ENTRY(), ENDPROC() for assembler functions.
> - Removed BITS_PER_LONG from __fls.
> - Using generic fls64().
> - Replaced lzcnt instruction with .word directive.
> v1->v2:
> - Fixed delay slot issue.
>
> Vijay Kumar (5):
> sparc64: Define SPARC default fls function
> sparc64: Define SPARC default __fls function
> sparc64: SPARC optimized fls function
> sparc64: SPARC optimized __fls function
> sparc64: Use sparc optimized fls and __fls for T4 and above
>
> arch/sparc/include/asm/bitops_64.h | 5 ++-
> arch/sparc/kernel/head_64.S | 2 +
> arch/sparc/lib/Makefile | 3 ++
> arch/sparc/lib/NG4fls.S | 30 ++++++++++++++++
> arch/sparc/lib/NG4patch.S | 9 +++++
> arch/sparc/lib/fls.S | 67 ++++++++++++++++++++++++++++++++++++
> arch/sparc/lib/fls64.S | 61 ++++++++++++++++++++++++++++++++
> 7 files changed, 175 insertions(+), 2 deletions(-)
> create mode 100644 arch/sparc/lib/NG4fls.S
> create mode 100644 arch/sparc/lib/fls.S
> create mode 100644 arch/sparc/lib/fls64.S
>
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