[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>
diff --git a/arch/arm/mm/copypage-v4mc.c b/arch/arm/mm/copypage-v4mc.c
index a5eae50..bdb5fd9 100644
--- a/arch/arm/mm/copypage-v4mc.c
+++ b/arch/arm/mm/copypage-v4mc.c
@@ -93,9 +93,9 @@
*/
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 @@
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);
}