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| author | Vijay Kumar <vijay.ac.kumar@oracle.com> | 2017-10-11 20:50:06 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-11-15 06:26:46 +0100 |
| commit | 46ad8d2d22c17e2b577adec55ae87161666a3267 (patch) | |
| tree | dac0c0d3b741e169a4269c59ee1ef152c8ba9583 | |
| parent | sparc64: SPARC optimized __fls function (diff) | |
| download | linux-46ad8d2d22c17e2b577adec55ae87161666a3267.tar.xz linux-46ad8d2d22c17e2b577adec55ae87161666a3267.zip | |
sparc64: Use sparc optimized fls and __fls for T4 and above
For T4 and above, patch fls and __fls functions
at the boot time to use lzcnt instruction.
Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | arch/sparc/kernel/head_64.S | 2 | ||||
| -rw-r--r-- | arch/sparc/lib/NG4patch.S | 9 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S index 4de9fbd1a177..f362ecb9955d 100644 --- a/arch/sparc/kernel/head_64.S +++ b/arch/sparc/kernel/head_64.S @@ -640,6 +640,8 @@ niagara4_patch: nop call niagara4_patch_pageops nop + call niagara4_patch_fls + nop ba,a,pt %xcc, 80f nop diff --git a/arch/sparc/lib/NG4patch.S b/arch/sparc/lib/NG4patch.S index 3cc0f8cc95df..da65a3ebb7cc 100644 --- a/arch/sparc/lib/NG4patch.S +++ b/arch/sparc/lib/NG4patch.S @@ -3,6 +3,8 @@ * Copyright (C) 2012 David S. Miller <davem@davemloft.net> */ +#include <linux/linkage.h> + #define BRANCH_ALWAYS 0x10680000 #define NOP 0x01000000 #define NG_DO_PATCH(OLD, NEW) \ @@ -52,3 +54,10 @@ niagara4_patch_pageops: retl nop .size niagara4_patch_pageops,.-niagara4_patch_pageops + +ENTRY(niagara4_patch_fls) + NG_DO_PATCH(fls, NG4fls) + NG_DO_PATCH(__fls, __NG4fls) + retl + nop +ENDPROC(niagara4_patch_fls) |