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authorVijay Kumar <vijay.ac.kumar@oracle.com>2017-10-11 12:50:06 -0600
committerDavid S. Miller <davem@davemloft.net>2017-11-15 14:26:46 +0900
commit46ad8d2d22c17e2b577adec55ae87161666a3267 (patch)
treedac0c0d3b741e169a4269c59ee1ef152c8ba9583 /arch/sparc/lib
parentsparc64: SPARC optimized __fls function (diff)
downloadlinux-dev-46ad8d2d22c17e2b577adec55ae87161666a3267.tar.xz
linux-dev-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>
Diffstat (limited to 'arch/sparc/lib')
-rw-r--r--arch/sparc/lib/NG4patch.S9
1 files changed, 9 insertions, 0 deletions
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)