diff options
| author | Russell King <rmk@dyn-67.arm.linux.org.uk> | 2008-10-31 16:32:19 +0000 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2008-11-27 23:53:48 +0000 |
| commit | 303c6443659bc1dc911356f5de149f48ff1d97b8 (patch) | |
| tree | 75da0aef28ec8e843cdeb24c96349bdf812e2740 /arch/arm/mm/copypage-v4wt.c | |
| parent | 063b0a4207e43acbeff3d4b09f43e750e0212b48 (diff) | |
[ARM] clearpage: provide our own clear_user_highpage()
For similar reasons as copy_user_page(), we want to avoid the
additional kmap_atomic if it's unnecessary.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/copypage-v4wt.c')
| -rw-r--r-- | arch/arm/mm/copypage-v4wt.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/arch/arm/mm/copypage-v4wt.c b/arch/arm/mm/copypage-v4wt.c index 86c2cfdbde03..b8a345d6e77e 100644 --- a/arch/arm/mm/copypage-v4wt.c +++ b/arch/arm/mm/copypage-v4wt.c @@ -60,29 +60,29 @@ void v4wt_copy_user_highpage(struct page *to, struct page *from, * * Same story as above. */ -void __attribute__((naked)) -v4wt_clear_user_page(void *kaddr, unsigned long vaddr) +void v4wt_clear_user_highpage(struct page *page, unsigned long vaddr) { + void *kaddr = kmap_atomic(page, KM_USER0); asm("\ - str lr, [sp, #-4]!\n\ - mov r1, %0 @ 1\n\ + mov r1, %1 @ 1\n\ mov r2, #0 @ 1\n\ mov r3, #0 @ 1\n\ mov ip, #0 @ 1\n\ mov lr, #0 @ 1\n\ -1: stmia r0!, {r2, r3, ip, lr} @ 4\n\ - stmia r0!, {r2, r3, ip, lr} @ 4\n\ - stmia r0!, {r2, r3, ip, lr} @ 4\n\ - stmia r0!, {r2, r3, ip, lr} @ 4\n\ +1: stmia %0!, {r2, r3, ip, lr} @ 4\n\ + stmia %0!, {r2, r3, ip, lr} @ 4\n\ + stmia %0!, {r2, r3, ip, lr} @ 4\n\ + stmia %0!, {r2, r3, ip, lr} @ 4\n\ subs r1, r1, #1 @ 1\n\ bne 1b @ 1\n\ - mcr p15, 0, r2, c7, c7, 0 @ flush ID cache\n\ - ldr pc, [sp], #4" + mcr p15, 0, r2, c7, c7, 0 @ flush ID cache" : - : "I" (PAGE_SIZE / 64)); + : "r" (kaddr), "I" (PAGE_SIZE / 64) + : "r1", "r2", "r3", "ip", "lr"); + kunmap_atomic(kaddr, KM_USER0); } struct cpu_user_fns v4wt_user_fns __initdata = { - .cpu_clear_user_page = v4wt_clear_user_page, + .cpu_clear_user_highpage = v4wt_clear_user_highpage, .cpu_copy_user_highpage = v4wt_copy_user_highpage, }; |