From: David Daney <ddaney@caviumnetworks.com>
Date: Fri, 25 Jun 2010 23:46:08 +0000 (-0700)
Subject: MIPS: Octeon: Define ARCH_HAS_USABLE_BUILTIN_POPCOUNT for OCTEON.
X-Git-Tag: v2.6.36-rc1~563^2~77
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1d1929c7662d5da3badcf0df2ca5c9b2dc15db97;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

MIPS: Octeon: Define ARCH_HAS_USABLE_BUILTIN_POPCOUNT for OCTEON.

OCTEON implements __builtin_popcount with a single instruction, so lets use it.

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
To: linux-mips@linux-mips.org
Cc: David Daney <ddaney@caviumnetworks.com>
Patchwork: https://patchwork.linux-mips.org/patch/1431/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
index bbf0540..2a7ea90 100644
--- a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h
@@ -77,6 +77,14 @@ static inline int read_current_timer(unsigned long *result)
 	return 0;
 }
 
+#ifdef __OCTEON__
+/*
+ * All gcc versions that have OCTEON support define __OCTEON__ and have the
+ *  __builtin_popcount support.
+ */
+#define ARCH_HAS_USABLE_BUILTIN_POPCOUNT 1
+#endif
+
 static inline int octeon_has_saa(void)
 {
 	int id;