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authorNicolas Pitre <nico@cam.org>2008-11-04 02:42:27 -0500
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-11-28 15:36:43 +0000
commit43ae286b7d4d8c4983bc263ef2e3cccc10dedb2b (patch)
treebe10faffb48904e5bb962fbd45f7cb2ff395caea /arch/arm/mm
parent303c6443659bc1dc911356f5de149f48ff1d97b8 (diff)
downloadlinux-43ae286b7d4d8c4983bc263ef2e3cccc10dedb2b.tar.gz
[ARM] fix a couple clear_user_highpage assembly constraints
In all cases the kaddr is assigned an input register even though it is modified in the assembly code. Let's assign a new variable to the modified value and mark those inline asm with volatile otherwise they get optimized away because the output variable is otherwise not used. Also fix a few conversion errors in copypage-feroceon.c and copypage-v4mc.c. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm')
-rw-r--r--arch/arm/mm/copypage-feroceon.c12
-rw-r--r--arch/arm/mm/copypage-v3.c10
-rw-r--r--arch/arm/mm/copypage-v4mc.c8
-rw-r--r--arch/arm/mm/copypage-v4wb.c10
-rw-r--r--arch/arm/mm/copypage-v4wt.c10
-rw-r--r--arch/arm/mm/copypage-xsc3.c10
-rw-r--r--arch/arm/mm/copypage-xscale.c8
7 files changed, 34 insertions, 34 deletions
diff --git a/arch/arm/mm/copypage-feroceon.c b/arch/arm/mm/copypage-feroceon.c
index c3651b2939c..c3ba6a94da0 100644
--- a/arch/arm/mm/copypage-feroceon.c
+++ b/arch/arm/mm/copypage-feroceon.c
@@ -81,9 +81,9 @@ void feroceon_copy_user_highpage(struct page *to, struct page *from,
void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
- asm("\
- mov r1, %1 \n\
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+ asm volatile ("\
+ mov r1, %2 \n\
mov r2, #0 \n\
mov r3, #0 \n\
mov r4, #0 \n\
@@ -95,11 +95,11 @@ void feroceon_clear_user_highpage(struct page *page, unsigned long vaddr)
1: stmia %0, {r2-r7, ip, lr} \n\
subs r1, r1, #1 \n\
mcr p15, 0, %0, c7, c14, 1 @ clean and invalidate D line\n\
- add r0, r0, #32 \n\
+ add %0, %0, #32 \n\
bne 1b \n\
mcr p15, 0, r1, c7, c10, 4 @ drain WB"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 32)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 32)
: "r1", "r2", "r3", "r4", "r5", "r6", "r7", "ip", "lr");
kunmap_atomic(kaddr, KM_USER0);
}
diff --git a/arch/arm/mm/copypage-v3.c b/arch/arm/mm/copypage-v3.c
index 13ce0baa6ba..70ed96c8af8 100644
--- a/arch/arm/mm/copypage-v3.c
+++ b/arch/arm/mm/copypage-v3.c
@@ -56,9 +56,9 @@ void v3_copy_user_highpage(struct page *to, struct page *from,
*/
void v3_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
- asm("\n\
- mov r1, %1 @ 1\n\
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+ asm volatile("\n\
+ mov r1, %2 @ 1\n\
mov r2, #0 @ 1\n\
mov r3, #0 @ 1\n\
mov ip, #0 @ 1\n\
@@ -69,8 +69,8 @@ void v3_clear_user_highpage(struct page *page, unsigned long vaddr)
stmia %0!, {r2, r3, ip, lr} @ 4\n\
subs r1, r1, #1 @ 1\n\
bne 1b @ 1"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 64)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 64)
: "r1", "r2", "r3", "ip", "lr");
kunmap_atomic(kaddr, KM_USER0);
}
diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index a5eae503a34..bdb5fd983b1 100644
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -93,9 +93,9 @@ void v4_mc_copy_user_highpage(struct page *from, struct page *to,
*/
void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
asm volatile("\
- mov r1, %0 @ 1\n\
+ mov r1, %2 @ 1\n\
mov r2, #0 @ 1\n\
mov r3, #0 @ 1\n\
mov ip, #0 @ 1\n\
@@ -108,8 +108,8 @@ void v4_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
stmia %0!, {r2, r3, ip, lr} @ 4\n\
subs r1, r1, #1 @ 1\n\
bne 1b @ 1"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 64)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 64)
: "r1", "r2", "r3", "ip", "lr");
kunmap_atomic(kaddr, KM_USER0);
}
diff --git a/arch/arm/mm/copypage-v4wb.c b/arch/arm/mm/copypage-v4wb.c
index 9144a96037b..3ec93dab765 100644
--- a/arch/arm/mm/copypage-v4wb.c
+++ b/arch/arm/mm/copypage-v4wb.c
@@ -66,9 +66,9 @@ void v4wb_copy_user_highpage(struct page *to, struct page *from,
*/
void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
- asm("\
- mov r1, %1 @ 1\n\
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+ asm volatile("\
+ mov r1, %2 @ 1\n\
mov r2, #0 @ 1\n\
mov r3, #0 @ 1\n\
mov ip, #0 @ 1\n\
@@ -82,8 +82,8 @@ void v4wb_clear_user_highpage(struct page *page, unsigned long vaddr)
subs r1, r1, #1 @ 1\n\
bne 1b @ 1\n\
mcr p15, 0, r1, c7, c10, 4 @ 1 drain WB"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 64)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 64)
: "r1", "r2", "r3", "ip", "lr");
kunmap_atomic(kaddr, KM_USER0);
}
diff --git a/arch/arm/mm/copypage-v4wt.c b/arch/arm/mm/copypage-v4wt.c
index b8a345d6e77..0f1188efae4 100644
--- a/arch/arm/mm/copypage-v4wt.c
+++ b/arch/arm/mm/copypage-v4wt.c
@@ -62,9 +62,9 @@ void v4wt_copy_user_highpage(struct page *to, struct page *from,
*/
void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
- asm("\
- mov r1, %1 @ 1\n\
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+ asm volatile("\
+ mov r1, %2 @ 1\n\
mov r2, #0 @ 1\n\
mov r3, #0 @ 1\n\
mov ip, #0 @ 1\n\
@@ -76,8 +76,8 @@ void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr)
subs r1, r1, #1 @ 1\n\
bne 1b @ 1\n\
mcr p15, 0, r2, c7, c7, 0 @ flush ID cache"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 64)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 64)
: "r1", "r2", "r3", "ip", "lr");
kunmap_atomic(kaddr, KM_USER0);
}
diff --git a/arch/arm/mm/copypage-xsc3.c b/arch/arm/mm/copypage-xsc3.c
index 0e7cb325ca4..39a994542ca 100644
--- a/arch/arm/mm/copypage-xsc3.c
+++ b/arch/arm/mm/copypage-xsc3.c
@@ -89,9 +89,9 @@ void xsc3_mc_copy_user_highpage(struct page *to, struct page *from,
*/
void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
- asm("\
- mov r1, %1 \n\
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
+ asm volatile ("\
+ mov r1, %2 \n\
mov r2, #0 \n\
mov r3, #0 \n\
1: mcr p15, 0, %0, c7, c6, 1 @ invalidate line\n\
@@ -101,8 +101,8 @@ void xsc3_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
strd r2, [%0], #8 \n\
subs r1, r1, #1 \n\
bne 1b"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 32)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 32)
: "r1", "r2", "r3");
kunmap_atomic(kaddr, KM_USER0);
}
diff --git a/arch/arm/mm/copypage-xscale.c b/arch/arm/mm/copypage-xscale.c
index aa9f2ff9dce..d18f2397ee2 100644
--- a/arch/arm/mm/copypage-xscale.c
+++ b/arch/arm/mm/copypage-xscale.c
@@ -116,9 +116,9 @@ void xscale_mc_copy_user_highpage(struct page *to, struct page *from,
void
xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
{
- void *kaddr = kmap_atomic(page, KM_USER0);
+ void *ptr, *kaddr = kmap_atomic(page, KM_USER0);
asm volatile(
- "mov r1, %1 \n\
+ "mov r1, %2 \n\
mov r2, #0 \n\
mov r3, #0 \n\
1: mov ip, %0 \n\
@@ -130,8 +130,8 @@ xscale_mc_clear_user_highpage(struct page *page, unsigned long vaddr)
subs r1, r1, #1 \n\
mcr p15, 0, ip, c7, c6, 1 @ invalidate D line\n\
bne 1b"
- :
- : "r" (kaddr), "I" (PAGE_SIZE / 32)
+ : "=r" (ptr)
+ : "0" (kaddr), "I" (PAGE_SIZE / 32)
: "r1", "r2", "r3", "ip");
kunmap_atomic(kaddr, KM_USER0);
}