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uprobes: Rename vma_address() and make it return "unsigned long"

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1. vma_address() returns loff_t, this looks confusing and this
   is unnecessary after the previous change. Make it return "ulong",
   all callers truncate the result anyway.

2. Its name conflicts with mm/rmap.c:vma_address(), rename it to
   offset_to_vaddr(), this matches vaddr_to_offset().

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Srikar Dronamraju <srikar.vnet.ibm.com>
Cc: Anton Arapov <anton@redhat.com>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20120729182247.GA20365@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Oleg Nesterov 2012-07-29 20:22:47 +02:00 committed by Ingo Molnar
parent f4d6dfe551
commit 57683f72b8
1 changed files with 5 additions and 10 deletions
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15
kernel/events/uprobes.c
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@ -112,14 +112,9 @@ static bool valid_vma(struct vm_area_struct *vma, bool is_register)
return false;
}
static loff_t vma_address(struct vm_area_struct *vma, loff_t offset)
static unsigned long offset_to_vaddr(struct vm_area_struct *vma, loff_t offset)
{
loff_t vaddr;
vaddr = vma->vm_start + offset;
vaddr -= (loff_t)vma->vm_pgoff << PAGE_SHIFT;
return vaddr;
return vma->vm_start + offset - ((loff_t)vma->vm_pgoff << PAGE_SHIFT);
}
static loff_t vaddr_to_offset(struct vm_area_struct *vma, unsigned long vaddr)
@ -775,7 +770,7 @@ build_map_info(struct address_space *mapping, loff_t offset, bool is_register)
curr = info;
info->mm = vma->vm_mm;
info->vaddr = vma_address(vma, offset);
info->vaddr = offset_to_vaddr(vma, offset);
}
mutex_unlock(&mapping->i_mmap_mutex);
@ -1042,7 +1037,7 @@ int uprobe_mmap(struct vm_area_struct *vma)
list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) {
if (!ret) {
loff_t vaddr = vma_address(vma, uprobe->offset);
unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset);
ret = install_breakpoint(uprobe, vma->vm_mm, vma, vaddr);
/*
@ -1103,7 +1098,7 @@ void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned lon
build_probe_list(inode, vma, start, end, &tmp_list);
list_for_each_entry_safe(uprobe, u, &tmp_list, pending_list) {
loff_t vaddr = vma_address(vma, uprobe->offset);
unsigned long vaddr = offset_to_vaddr(vma, uprobe->offset);
/*
* An unregister could have removed the probe before
* unmap. So check before we decrement the count.