redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

[PATCH] freepgt: mpnt to vma cleanup 

While dabbling here in mmap.c, clean up mysterious "mpnt"s to "vma"s.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
hifive-unleashed-5.1
Hugh Dickins 2005-04-19 13:29:18 -07:00 committed by Linus Torvalds
parent 8f6c99c11a
commit 146425a316
1 changed files with 17 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

35
mm/mmap.c
View File

@ -1602,14 +1602,13 @@ static void unmap_vma(struct mm_struct *mm, struct vm_area_struct *area)
* Ok - we have the memory areas we should free on the 'free' list,
* so release them, and do the vma updates.
*/
static void unmap_vma_list(struct mm_struct *mm,
struct vm_area_struct *mpnt)
static void unmap_vma_list(struct mm_struct *mm, struct vm_area_struct *vma)
{
do {
struct vm_area_struct *next = mpnt->vm_next;
unmap_vma(mm, mpnt);
mpnt = next;
} while (mpnt != NULL);
struct vm_area_struct *next = vma->vm_next;
unmap_vma(mm, vma);
vma = next;
} while (vma);
validate_mm(mm);
}
@ -1720,7 +1719,7 @@ int split_vma(struct mm_struct * mm, struct vm_area_struct * vma,
int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
{
unsigned long end;
struct vm_area_struct *mpnt, *prev, *last;
struct vm_area_struct *vma, *prev, *last;
if ((start & ~PAGE_MASK) || start > TASK_SIZE || len > TASK_SIZE-start)
return -EINVAL;
@ -1729,14 +1728,14 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
return -EINVAL;
/* Find the first overlapping VMA */
mpnt = find_vma_prev(mm, start, &prev);
if (!mpnt)
vma = find_vma_prev(mm, start, &prev);
if (!vma)
return 0;
/* we have start < mpnt->vm_end */
/* we have start < vma->vm_end */
/* if it doesn't overlap, we have nothing.. */
end = start + len;
if (mpnt->vm_start >= end)
if (vma->vm_start >= end)
return 0;
/*
@ -1746,11 +1745,11 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
* unmapped vm_area_struct will remain in use: so lower split_vma
* places tmp vma above, and higher split_vma places tmp vma below.
*/
if (start > mpnt->vm_start) {
int error = split_vma(mm, mpnt, start, 0);
if (start > vma->vm_start) {
int error = split_vma(mm, vma, start, 0);
if (error)
return error;
prev = mpnt;
prev = vma;
}
/* Does it split the last one? */
@ -1760,16 +1759,16 @@ int do_munmap(struct mm_struct *mm, unsigned long start, size_t len)
if (error)
return error;
}
mpnt = prev? prev->vm_next: mm->mmap;
vma = prev? prev->vm_next: mm->mmap;
/*
* Remove the vma's, and unmap the actual pages
*/
detach_vmas_to_be_unmapped(mm, mpnt, prev, end);
unmap_region(mm, mpnt, prev, start, end);
detach_vmas_to_be_unmapped(mm, vma, prev, end);
unmap_region(mm, vma, prev, start, end);
/* Fix up all other VM information */
unmap_vma_list(mm, mpnt);
unmap_vma_list(mm, vma);
return 0;
}