linux-kernel - [PATCH 4.4 55/73] ARC: Assume multiplier is always present

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Date:   Mon,  8 Jul 2019 17:13:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Vineet Gupta <vgupta@...opsys.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 55/73] ARC: Assume multiplier is always present

[ Upstream commit 0eca6fdb3193410fbe66b6f064431cc394513e82 ]

It is unlikely that designs running Linux will not have multiplier.
Further the current support is not complete as tool don't generate a
multilib w/o multiplier.

Signed-off-by: Vineet Gupta <vgupta@...opsys.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arc/Kconfig        | 8 --------
 arch/arc/Makefile       | 4 ----
 arch/arc/kernel/setup.c | 2 --
 3 files changed, 14 deletions(-)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index e983f410135a..a5d8bef65911 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -278,14 +278,6 @@ config ARC_DCCM_BASE
 	default "0xA0000000"
 	depends on ARC_HAS_DCCM
 
-config ARC_HAS_HW_MPY
-	bool "Use Hardware Multiplier (Normal or Faster XMAC)"
-	default y
-	help
-	  Influences how gcc generates code for MPY operations.
-	  If enabled, MPYxx insns are generated, provided by Standard/XMAC
-	  Multipler. Otherwise software multipy lib is used
-
 choice
 	prompt "MMU Version"
 	default ARC_MMU_V3 if ARC_CPU_770
diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index fffaff9c7b2c..8f8d53f08141 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -72,10 +72,6 @@ ldflags-$(CONFIG_CPU_BIG_ENDIAN)	+= -EB
 # --build-id w/o "-marclinux". Default arc-elf32-ld is OK
 ldflags-$(upto_gcc44)			+= -marclinux
 
-ifndef CONFIG_ARC_HAS_HW_MPY
-	cflags-y	+= -mno-mpy
-endif
-
 LIBGCC	:= $(shell $(CC) $(cflags-y) --print-libgcc-file-name)
 
 # Modules with short calls might break for calls into builtin-kernel
diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
index 05131805aa33..3013f3f82b95 100644
--- a/arch/arc/kernel/setup.c
+++ b/arch/arc/kernel/setup.c
@@ -232,8 +232,6 @@ static char *arc_cpu_mumbojumbo(int cpu_id, char *buf, int len)
 
 			n += scnprintf(buf + n, len - n, "mpy[opt %d] ", opt);
 		}
-		n += scnprintf(buf + n, len - n, "%s",
-			       IS_USED_CFG(CONFIG_ARC_HAS_HW_MPY));
 	}
 
 	n += scnprintf(buf + n, len - n, "%s%s%s%s%s%s%s%s\n",
-- 
2.20.1