ARM: 6164/1: Add kto and kfrom to input operands list.
When functions incoming parameters are not in input operands list gcc
4.5 does not load the parameters into registers before calling this
function but the inline assembly assumes valid addresses inside this
function. This breaks the code because r0 and r1 are invalid when
execution enters v4wb_copy_user_page ()
Also the constant needs to be used as third input operand so account
for that as well.
Tested on qemu arm.
CC: <stable@kernel.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mm/copypage-v4wt.c b/arch/arm/mm/copypage-v4wt.c
index 172e6a5..30c7d04 100644
--- a/arch/arm/mm/copypage-v4wt.c
+++ b/arch/arm/mm/copypage-v4wt.c
@@ -25,7 +25,7 @@
{
asm("\
stmfd sp!, {r4, lr} @ 2\n\
- mov r2, %0 @ 1\n\
+ mov r2, %2 @ 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 @@
mcr p15, 0, r2, c7, c7, 0 @ flush ID cache\n\
ldmfd sp!, {r4, pc} @ 3"
:
- : "I" (PAGE_SIZE / 64));
+ : "r" (kto), "r" (kfrom), "I" (PAGE_SIZE / 64));
}
void v4wt_copy_user_highpage(struct page *to, struct page *from,