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| author | Pekka Enberg <penberg@kernel.org> | 2011-09-19 17:46:07 +0300 |
|---|---|---|
| committer | Pekka Enberg <penberg@kernel.org> | 2011-09-19 17:46:07 +0300 |
| commit | d20bbfab01802e195a50435940f7e4aa747c217c (patch) | |
| tree | 82b0007e33c083050a4e60a49dbb2f5477b4c99d /arch/sparc/kernel/unaligned_64.c | |
| parent | a37933c37c14b64e81c7c9cc44a5d3f5e0c91412 (diff) | |
| parent | 136333d104bd3a62d783b0ac3d0f32ac0108c5d0 (diff) | |
Merge branch 'slab/urgent' into slab/next
Diffstat (limited to 'arch/sparc/kernel/unaligned_64.c')
| -rw-r--r-- | arch/sparc/kernel/unaligned_64.c | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/arch/sparc/kernel/unaligned_64.c b/arch/sparc/kernel/unaligned_64.c index 35cff1673aa..76e4ac1a13e 100644 --- a/arch/sparc/kernel/unaligned_64.c +++ b/arch/sparc/kernel/unaligned_64.c @@ -22,6 +22,7 @@ #include <linux/bitops.h> #include <linux/perf_event.h> #include <linux/ratelimit.h> +#include <linux/bitops.h> #include <asm/fpumacro.h> enum direction { @@ -373,16 +374,11 @@ asmlinkage void kernel_unaligned_trap(struct pt_regs *regs, unsigned int insn) } } -static char popc_helper[] = { -0, 1, 1, 2, 1, 2, 2, 3, -1, 2, 2, 3, 2, 3, 3, 4, -}; - int handle_popc(u32 insn, struct pt_regs *regs) { - u64 value; - int ret, i, rd = ((insn >> 25) & 0x1f); int from_kernel = (regs->tstate & TSTATE_PRIV) != 0; + int ret, rd = ((insn >> 25) & 0x1f); + u64 value; perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0); if (insn & 0x2000) { @@ -392,10 +388,7 @@ int handle_popc(u32 insn, struct pt_regs *regs) maybe_flush_windows(0, insn & 0x1f, rd, from_kernel); value = fetch_reg(insn & 0x1f, regs); } - for (ret = 0, i = 0; i < 16; i++) { - ret += popc_helper[value & 0xf]; - value >>= 4; - } + ret = hweight64(value); if (rd < 16) { if (rd) regs->u_regs[rd] = ret; |