linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Stefan Agner <stefan@agner.ch>
To: linux@armlinux.org.uk
Cc: ndesaulniers@google.com, natechancellor@gmail.com, arnd@arndb.de,
	ard.biesheuvel@linaro.org, nicolas.pitre@linaro.org,
	thierry.reding@gmail.com, will.deacon@arm.com,
	julien.thierry@arm.com, mark.rutland@arm.com,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	Stefan Agner <stefan@agner.ch>
Subject: [PATCH v2 4/5] ARM: use unified assembler in c files
Date: Sun, 10 Feb 2019 00:09:01 +0100	[thread overview]
Message-ID: <bd8bee7847080382e021ef6e325f0097f2560951.1549753425.git.stefan@agner.ch> (raw)
In-Reply-To: <cover.1549753425.git.stefan@agner.ch>

Use unified assembler syntax (UAL) in inline assembler. Divided
syntax is considered deprecated. This will also allow to build
the kernel using LLVM's integrated assembler.

Signed-off-by: Stefan Agner <stefan@agner.ch>
---
Changes in v2:
- Force unified syntax for inline assembler using .syntax unified

 arch/arm/mm/copypage-v4mc.c | 3 ++-
 arch/arm/mm/copypage-v4wb.c | 3 ++-
 arch/arm/mm/copypage-v4wt.c | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index b03202cddddb..f74cdce6d4da 100644
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -45,6 +45,7 @@ static void mc_copy_user_page(void *from, void *to)
 	int tmp;
 
 	asm volatile ("\
+	.syntax unified\n\
 	ldmia	%0!, {r2, r3, ip, lr}		@ 4\n\
 1:	mcr	p15, 0, %1, c7, c6, 1		@ 1   invalidate D line\n\
 	stmia	%1!, {r2, r3, ip, lr}		@ 4\n\
@@ -56,7 +57,7 @@ static void mc_copy_user_page(void *from, void *to)
 	ldmia	%0!, {r2, r3, ip, lr}		@ 4\n\
 	subs	%2, %2, #1			@ 1\n\
 	stmia	%1!, {r2, r3, ip, lr}		@ 4\n\
-	ldmneia	%0!, {r2, r3, ip, lr}		@ 4\n\
+	ldmiane	%0!, {r2, r3, ip, lr}		@ 4\n\
 	bne	1b				@ "
 	: "+&r" (from), "+&r" (to), "=&r" (tmp)
 	: "2" (PAGE_SIZE / 64)
diff --git a/arch/arm/mm/copypage-v4wb.c b/arch/arm/mm/copypage-v4wb.c
index cd3e165afeed..6d336740aae4 100644
--- a/arch/arm/mm/copypage-v4wb.c
+++ b/arch/arm/mm/copypage-v4wb.c
@@ -27,6 +27,7 @@ static void v4wb_copy_user_page(void *kto, const void *kfrom)
 	int tmp;
 
 	asm volatile ("\
+	.syntax unified\n\
 	ldmia	%1!, {r3, r4, ip, lr}		@ 4\n\
 1:	mcr	p15, 0, %0, c7, c6, 1		@ 1   invalidate D line\n\
 	stmia	%0!, {r3, r4, ip, lr}		@ 4\n\
@@ -38,7 +39,7 @@ static void v4wb_copy_user_page(void *kto, const void *kfrom)
 	ldmia	%1!, {r3, r4, ip, lr}		@ 4\n\
 	subs	%2, %2, #1			@ 1\n\
 	stmia	%0!, {r3, r4, ip, lr}		@ 4\n\
-	ldmneia	%1!, {r3, r4, ip, lr}		@ 4\n\
+	ldmiane	%1!, {r3, r4, ip, lr}		@ 4\n\
 	bne	1b				@ 1\n\
 	mcr	p15, 0, %1, c7, c10, 4		@ 1   drain WB"
 	: "+&r" (kto), "+&r" (kfrom), "=&r" (tmp)
diff --git a/arch/arm/mm/copypage-v4wt.c b/arch/arm/mm/copypage-v4wt.c
index 8614572e1296..3851bb396442 100644
--- a/arch/arm/mm/copypage-v4wt.c
+++ b/arch/arm/mm/copypage-v4wt.c
@@ -25,6 +25,7 @@ static void v4wt_copy_user_page(void *kto, const void *kfrom)
 	int tmp;
 
 	asm volatile ("\
+	.syntax unified\n\
 	ldmia	%1!, {r3, r4, ip, lr}		@ 4\n\
 1:	stmia	%0!, {r3, r4, ip, lr}		@ 4\n\
 	ldmia	%1!, {r3, r4, ip, lr}		@ 4+1\n\
@@ -34,7 +35,7 @@ static void v4wt_copy_user_page(void *kto, const void *kfrom)
 	ldmia	%1!, {r3, r4, ip, lr}		@ 4\n\
 	subs	%2, %2, #1			@ 1\n\
 	stmia	%0!, {r3, r4, ip, lr}		@ 4\n\
-	ldmneia	%1!, {r3, r4, ip, lr}		@ 4\n\
+	ldmiane	%1!, {r3, r4, ip, lr}		@ 4\n\
 	bne	1b				@ 1\n\
 	mcr	p15, 0, %2, c7, c7, 0		@ flush ID cache"
 	: "+&r" (kto), "+&r" (kfrom), "=&r" (tmp)
-- 
2.20.1


  parent reply	other threads:[~2019-02-09 23:09 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-09 23:08 [PATCH v2 0/5] ARM: convert to unified syntax Stefan Agner
2019-02-09 23:08 ` [PATCH v2 1/5] ARM: use unified assembler in macros Stefan Agner
2019-02-09 23:08 ` [PATCH v2 2/5] ARM: use unified assembler in headers Stefan Agner
2019-02-09 23:09 ` [PATCH v2 3/5] ARM: use unified assembler in assembly files Stefan Agner
2019-02-09 23:09 ` Stefan Agner [this message]
2019-02-09 23:09 ` [PATCH v2 5/5] ARM: warn if divided syntax assembler is used Stefan Agner
2019-02-11 18:03   ` Nick Desaulniers
2019-02-10 21:24 ` [PATCH v2 0/5] ARM: convert to unified syntax Nicolas Pitre
2019-02-12 19:31   ` Stefan Agner

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=bd8bee7847080382e021ef6e325f0097f2560951.1549753425.git.stefan@agner.ch \
    --to=stefan@agner.ch \
    --cc=ard.biesheuvel@linaro.org \
    --cc=arnd@arndb.de \
    --cc=julien.thierry@arm.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux@armlinux.org.uk \
    --cc=mark.rutland@arm.com \
    --cc=natechancellor@gmail.com \
    --cc=ndesaulniers@google.com \
    --cc=nicolas.pitre@linaro.org \
    --cc=thierry.reding@gmail.com \
    --cc=will.deacon@arm.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).