Messages in this thread Patch in this message | | | From | Mike Frysinger <> | Subject | [PATCH] NOMMU: use copy_*_user_page() in access_process_vm() | Date | Wed, 25 Nov 2009 00:55:03 -0500 |
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From: Jie Zhang <jie.zhang@analog.com>
The mmu code uses the copy_*_user_page() variants in access_process_vm() rather than copy_*_user() as the former includes an icache flush. This is important when doing things like setting software breakpoints with gdb. So switch the nommu code over to do the same.
Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> --- mm/nommu.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/mm/nommu.c b/mm/nommu.c index 9876fa0..51ae9be 100644 --- a/mm/nommu.c +++ b/mm/nommu.c @@ -1889,9 +1889,11 @@ int access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, in /* only read or write mappings where it is permitted */ if (write && vma->vm_flags & VM_MAYWRITE) - len -= copy_to_user((void *) addr, buf, len); + copy_to_user_page(vma, NULL, NULL, + (void *) addr, buf, len); else if (!write && vma->vm_flags & VM_MAYREAD) - len -= copy_from_user(buf, (void *) addr, len); + copy_from_user_page(vma, NULL, NULL, + buf, (void *) addr, len); else len = 0; } else { -- 1.6.5.3
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