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Message-Id: <1455815113-2562966-3-git-send-email-arnd@arndb.de>
Date: Thu, 18 Feb 2016 18:05:08 +0100
From: Arnd Bergmann <arnd@...db.de>
To: Russell King <linux@....linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org,
Arnd Bergmann <arnd@...db.de>,
Ard Biesheuvel <ard.biesheuvel@...aro.org>,
Nicolas Pitre <nico@...aro.org>,
Jon Medhurst <tixy@...aro.org>,
Marc Zyngier <marc.zyngier@....com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/3] [RESEND] ARM: fix copypage-*.c building with clang
clang does not allow inline assembly in __naked functions to
have any register parameters and throws an error:
arch/arm/mm/copypage-v4wb.c:47:9: error: parameter references not allowed in naked functions
: "r" (kto), "r" (kfrom), "I" (PAGE_SIZE / 64));
Fortunately, all of these functions are trivial to convert to
using the registers directly.
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
arch/arm/mm/copypage-feroceon.c | 4 ++--
arch/arm/mm/copypage-v4mc.c | 26 +++++++++++++-------------
arch/arm/mm/copypage-v4wb.c | 4 ++--
arch/arm/mm/copypage-v4wt.c | 4 ++--
arch/arm/mm/copypage-xsc3.c | 4 ++--
arch/arm/mm/copypage-xscale.c | 4 ++--
6 files changed, 23 insertions(+), 23 deletions(-)
diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c
index 49ee0c1a7209..e69bf2f15f32 100644
--- a/arch/arm/mm/copypage-feroceon.c
+++ b/arch/arm/mm/copypage-feroceon.c
@@ -18,7 +18,7 @@ feroceon_copy_user_page(void *kto, const void *kfrom)
{
asm("\
stmfd sp!, {r4-r9, lr} \n\
- mov ip, %2 \n\
+ mov ip, %0 \n\
1: mov lr, r1 \n\
ldmia r1!, {r2 - r9} \n\
pld [lr, #32] \n\
@@ -64,7 +64,7 @@ feroceon_copy_user_page(void *kto, const void *kfrom)
mcr p15, 0, ip, c7, c10, 4 @ drain WB\n\
ldmfd sp!, {r4-r9, pc}"
:
- : "r" (kto), "r" (kfrom), "I" (PAGE_SIZE));
+ : "I" (PAGE_SIZE));
}
void feroceon_copy_user_highpage(struct page *to, struct page *from,
diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index 1267e64133b9..ea89722c00db 100644
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -45,23 +45,23 @@ mc_copy_user_page(void *from, void *to)
{
asm volatile(
"stmfd sp!, {r4, lr} @ 2\n\
- mov r4, %2 @ 1\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\
- ldmia %0!, {r2, r3, ip, lr} @ 4+1\n\
- stmia %1!, {r2, r3, ip, lr} @ 4\n\
- ldmia %0!, {r2, r3, ip, lr} @ 4\n\
- mcr p15, 0, %1, c7, c6, 1 @ 1 invalidate D line\n\
- stmia %1!, {r2, r3, ip, lr} @ 4\n\
- ldmia %0!, {r2, r3, ip, lr} @ 4\n\
+ mov r4, %0 @ 1\n\
+ ldmia r0!, {r2, r3, ip, lr} @ 4\n\
+1: mcr p15, 0, r1, c7, c6, 1 @ 1 invalidate D line\n\
+ stmia r1!, {r2, r3, ip, lr} @ 4\n\
+ ldmia r0!, {r2, r3, ip, lr} @ 4+1\n\
+ stmia r1!, {r2, r3, ip, lr} @ 4\n\
+ ldmia r0!, {r2, r3, ip, lr} @ 4\n\
+ mcr p15, 0, r1, c7, c6, 1 @ 1 invalidate D line\n\
+ stmia r1!, {r2, r3, ip, lr} @ 4\n\
+ ldmia r0!, {r2, r3, ip, lr} @ 4\n\
subs r4, r4, #1 @ 1\n\
- stmia %1!, {r2, r3, ip, lr} @ 4\n\
- ldmneia %0!, {r2, r3, ip, lr} @ 4\n\
+ stmia r1!, {r2, r3, ip, lr} @ 4\n\
+ ldmneia r0!, {r2, r3, ip, lr} @ 4\n\
bne 1b @ 1\n\
ldmfd sp!, {r4, pc} @ 3"
:
- : "r" (from), "r" (to), "I" (PAGE_SIZE / 64));
+ : "I" (PAGE_SIZE / 64));
}
void v4_mc_copy_user_highpage(struct page *to, struct page *from,
diff --git a/arch/arm/mm/copypage-v4wb.c b/arch/arm/mm/copypage-v4wb.c
index 067d0fdd630c..7ea9cf07bd5c 100644
--- a/arch/arm/mm/copypage-v4wb.c
+++ b/arch/arm/mm/copypage-v4wb.c
@@ -27,7 +27,7 @@ v4wb_copy_user_page(void *kto, const void *kfrom)
{
asm("\
stmfd sp!, {r4, lr} @ 2\n\
- mov r2, %2 @ 1\n\
+ mov r2, %0 @ 1\n\
ldmia r1!, {r3, r4, ip, lr} @ 4\n\
1: mcr p15, 0, r0, c7, c6, 1 @ 1 invalidate D line\n\
stmia r0!, {r3, r4, ip, lr} @ 4\n\
@@ -44,7 +44,7 @@ v4wb_copy_user_page(void *kto, const void *kfrom)
mcr p15, 0, r1, c7, c10, 4 @ 1 drain WB\n\
ldmfd sp!, {r4, pc} @ 3"
:
- : "r" (kto), "r" (kfrom), "I" (PAGE_SIZE / 64));
+ : "I" (PAGE_SIZE / 64));
}
void v4wb_copy_user_highpage(struct page *to, struct page *from,
diff --git a/arch/arm/mm/copypage-v4wt.c b/arch/arm/mm/copypage-v4wt.c
index b85c5da2e510..c742ab24efd6 100644
--- a/arch/arm/mm/copypage-v4wt.c
+++ b/arch/arm/mm/copypage-v4wt.c
@@ -25,7 +25,7 @@ v4wt_copy_user_page(void *kto, const void *kfrom)
{
asm("\
stmfd sp!, {r4, lr} @ 2\n\
- mov r2, %2 @ 1\n\
+ mov r2, %0 @ 1\n\
ldmia r1!, {r3, r4, ip, lr} @ 4\n\
1: stmia r0!, {r3, r4, ip, lr} @ 4\n\
ldmia r1!, {r3, r4, ip, lr} @ 4+1\n\
@@ -40,7 +40,7 @@ v4wt_copy_user_page(void *kto, const void *kfrom)
mcr p15, 0, r2, c7, c7, 0 @ flush ID cache\n\
ldmfd sp!, {r4, pc} @ 3"
:
- : "r" (kto), "r" (kfrom), "I" (PAGE_SIZE / 64));
+ : "I" (PAGE_SIZE / 64));
}
void v4wt_copy_user_highpage(struct page *to, struct page *from,
diff --git a/arch/arm/mm/copypage-xsc3.c b/arch/arm/mm/copypage-xsc3.c
index 03a2042aced5..17e4e11c4612 100644
--- a/arch/arm/mm/copypage-xsc3.c
+++ b/arch/arm/mm/copypage-xsc3.c
@@ -34,7 +34,7 @@ xsc3_mc_copy_user_page(void *kto, const void *kfrom)
{
asm("\
stmfd sp!, {r4, r5, lr} \n\
- mov lr, %2 \n\
+ mov lr, %0 \n\
\n\
pld [r1, #0] \n\
pld [r1, #32] \n\
@@ -67,7 +67,7 @@ xsc3_mc_copy_user_page(void *kto, const void *kfrom)
\n\
ldmfd sp!, {r4, r5, pc}"
:
- : "r" (kto), "r" (kfrom), "I" (PAGE_SIZE / 64 - 1));
+ : "I" (PAGE_SIZE / 64 - 1));
}
void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c
index 0fb85025344d..1034b4ce80cc 100644
--- a/arch/arm/mm/copypage-xscale.c
+++ b/arch/arm/mm/copypage-xscale.c
@@ -45,7 +45,7 @@ mc_copy_user_page(void *from, void *to)
*/
asm volatile(
"stmfd sp!, {r4, r5, lr} \n\
- mov lr, %2 \n\
+ mov lr, %0 \n\
pld [r0, #0] \n\
pld [r0, #32] \n\
pld [r1, #0] \n\
@@ -81,7 +81,7 @@ mc_copy_user_page(void *from, void *to)
beq 2b \n\
ldmfd sp!, {r4, r5, pc} "
:
- : "r" (from), "r" (to), "I" (PAGE_SIZE / 64 - 1));
+ : "I" (PAGE_SIZE / 64 - 1));
}
void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
--
2.7.0
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