Add the new helper, vaddr_to_offset(vma, vaddr) which returns the offset in vma->vm_file this vaddr is mapped at.
Change build_probe_list() and find_active_uprobe() to use the new helper, the next patch adds another user. Signed-off-by: Oleg Nesterov <o...@redhat.com> Acked-by: Srikar Dronamraju <srikar.vnet.ibm.com> --- kernel/events/uprobes.c | 14 ++++++++------ 1 files changed, 8 insertions(+), 6 deletions(-) diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index c825404..5c87042 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -122,6 +122,11 @@ static loff_t vma_address(struct vm_area_struct *vma, loff_t offset) return vaddr; } +static loff_t vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr) +{ + return ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + (vaddr - vma->vm_start); +} + /** * __replace_page - replace page in vma by new page. * based on replace_page in mm/ksm.c @@ -978,7 +983,7 @@ static void build_probe_list(struct inode *inode, struct uprobe *u; INIT_LIST_HEAD(head); - min = ((loff_t)vma->vm_pgoff << PAGE_SHIFT) + start - vma->vm_start; + min = vaddr_to_offset(vma, start); max = min + (end - start) - 1; spin_lock_irqsave(&uprobes_treelock, flags); @@ -1442,12 +1447,9 @@ static struct uprobe *find_active_uprobe(unsigned long bp_vaddr, int *is_swbp) vma = find_vma(mm, bp_vaddr); if (vma && vma->vm_start <= bp_vaddr) { if (valid_vma(vma, false)) { - struct inode *inode; - loff_t offset; + struct inode *inode = vma->vm_file->f_mapping->host; + loff_t offset = vaddr_to_offset(vma, bp_vaddr); - inode = vma->vm_file->f_mapping->host; - offset = bp_vaddr - vma->vm_start; - offset += (loff_t)vma->vm_pgoff << PAGE_SHIFT; uprobe = find_uprobe(inode, offset); } -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/