diff options
| author | Rabin Vincent <rabin@rab.in> | 2012-11-14 18:27:07 +0100 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2012-11-14 18:32:24 +0100 |
| commit | 65b6ecc03838fd263cf7fafdfa6cf13012b91d56 (patch) | |
| tree | e32752232a7f4f4272ca70d6b9bab6c20d56cbee | |
| parent | 19f5ee2716373519fda2129e9333f4c3847aa742 (diff) | |
uprobes: Flush cache after xol write
Flush the cache so that the instructions written to the XOL area are
visible.
Signed-off-by: Rabin Vincent <rabin@rab.in>
Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
| -rw-r--r-- | kernel/events/uprobes.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 39c75cc51ef..5ce99cfd2e6 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -1199,6 +1199,11 @@ static unsigned long xol_get_insn_slot(struct uprobe *uprobe, unsigned long slot vaddr = kmap_atomic(area->page); memcpy(vaddr + offset, uprobe->arch.insn, MAX_UINSN_BYTES); kunmap_atomic(vaddr); + /* + * We probably need flush_icache_user_range() but it needs vma. + * This should work on supported architectures too. + */ + flush_dcache_page(area->page); return current->utask->xol_vaddr; } |