From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936463AbdGTSqb (ORCPT ); Thu, 20 Jul 2017 14:46:31 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:50563 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S936284AbdGTSpz (ORCPT ); Thu, 20 Jul 2017 14:45:55 -0400 From: Matthew Wilcox To: linux-kernel@vger.kernel.org Cc: minchan@kernel.org, Matthew Wilcox , akpm@linuxfoundation.org, mpe@ellerman.id.au Subject: [PATCH v4 5/8] alpha: Add support for memset16 Date: Thu, 20 Jul 2017 11:45:36 -0700 Message-Id: <20170720184539.31609-6-willy@infradead.org> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170720184539.31609-1-willy@infradead.org> References: <20170720184539.31609-1-willy@infradead.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Matthew Wilcox Alpha already had an optimised fill-memory-with-16-bit-quantity assembler routine called memsetw(). It has a slightly different calling convention from memset16() in that it takes a byte count, not a count of words. That's the same convention used by ARM's __memset routines, so rename Alpha's routine to match and add a memset16() wrapper around it. Then convert Alpha's scr_memsetw() to call memset16() instead of memsetw(). Signed-off-by: Matthew Wilcox --- arch/alpha/include/asm/string.h | 15 ++++++++------- arch/alpha/include/asm/vga.h | 2 +- arch/alpha/lib/memset.S | 10 +++++----- 3 files changed, 14 insertions(+), 13 deletions(-) diff --git a/arch/alpha/include/asm/string.h b/arch/alpha/include/asm/string.h index c2911f591704..9eb9933d845f 100644 --- a/arch/alpha/include/asm/string.h +++ b/arch/alpha/include/asm/string.h @@ -65,13 +65,14 @@ extern void * memchr(const void *, int, size_t); aligned values. The DEST and COUNT parameters must be even for correct operation. */ -#define __HAVE_ARCH_MEMSETW -extern void * __memsetw(void *dest, unsigned short, size_t count); - -#define memsetw(s, c, n) \ -(__builtin_constant_p(c) \ - ? __constant_c_memset((s),0x0001000100010001UL*(unsigned short)(c),(n)) \ - : __memsetw((s),(c),(n))) +#define __HAVE_ARCH_MEMSET16 +extern void * __memset16(void *dest, unsigned short, size_t count); +static inline void *memset16(uint16_t *p, uint16_t v, size_t n) +{ + if (__builtin_constant_p(v)) + return __constant_c_memset(p, 0x0001000100010001UL * v, n * 2); + return __memset16(p, v, n * 2); +} #endif /* __KERNEL__ */ diff --git a/arch/alpha/include/asm/vga.h b/arch/alpha/include/asm/vga.h index c00106bac521..3c1c2b6128e7 100644 --- a/arch/alpha/include/asm/vga.h +++ b/arch/alpha/include/asm/vga.h @@ -34,7 +34,7 @@ static inline void scr_memsetw(u16 *s, u16 c, unsigned int count) if (__is_ioaddr(s)) memsetw_io((u16 __iomem *) s, c, count); else - memsetw(s, c, count); + memset16(s, c, count / 2); } /* Do not trust that the usage will be correct; analyze the arguments. */ diff --git a/arch/alpha/lib/memset.S b/arch/alpha/lib/memset.S index 89a26f5e89de..f824969e9e77 100644 --- a/arch/alpha/lib/memset.S +++ b/arch/alpha/lib/memset.S @@ -20,7 +20,7 @@ .globl memset .globl __memset .globl ___memset - .globl __memsetw + .globl __memset16 .globl __constant_c_memset .ent ___memset @@ -110,8 +110,8 @@ EXPORT_SYMBOL(___memset) EXPORT_SYMBOL(__constant_c_memset) .align 5 - .ent __memsetw -__memsetw: + .ent __memset16 +__memset16: .prologue 0 inswl $17,0,$1 /* E0 */ @@ -123,8 +123,8 @@ __memsetw: or $1,$4,$17 /* E0 */ br __constant_c_memset /* .. E1 */ - .end __memsetw -EXPORT_SYMBOL(__memsetw) + .end __memset16 +EXPORT_SYMBOL(__memset16) memset = ___memset __memset = ___memset -- 2.13.2