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vma_page_offset() has no callees: drop it 

Hugh adds: vma_pagecache_offset() has a dangerously misleading name, since
it's using hugepage units: rename it to vma_hugecache_offset().

[apw@shadowen.org: restack onto fixed MAP_PRIVATE reservations]
[akpm@linux-foundation.org: vma_split conversion]
Signed-off-by: Johannes Weiner <hannes@saeurebad.de>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Adam Litke <agl@us.ibm.com>
Cc: Nishanth Aravamudan <nacc@us.ibm.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2008-07-23 21:27:33 -07:00 committed by Linus Torvalds
parent 84afd99b83
commit a858f7b2e9
1 changed files with 9 additions and 20 deletions
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29
mm/hugetlb.c
View File

@ -199,22 +199,11 @@ static long region_count(struct list_head *head, long f, long t)
return chg;
}
/*
* Convert the address within this vma to the page offset within
* the mapping, in base page units.
*/
static pgoff_t vma_page_offset(struct vm_area_struct *vma,
unsigned long address)
{
return ((address - vma->vm_start) >> PAGE_SHIFT) +
(vma->vm_pgoff >> PAGE_SHIFT);
}
/*
* Convert the address within this vma to the page offset within
* the mapping, in pagecache page units; huge pages here.
*/
static pgoff_t vma_pagecache_offset(struct vm_area_struct *vma,
static pgoff_t vma_hugecache_offset(struct vm_area_struct *vma,
unsigned long address)
{
return ((address - vma->vm_start) >> HPAGE_SHIFT) +
@ -806,7 +795,7 @@ static int vma_needs_reservation(struct vm_area_struct *vma, unsigned long addr)
struct inode *inode = mapping->host;
if (vma->vm_flags & VM_SHARED) {
pgoff_t idx = vma_pagecache_offset(vma, addr);
pgoff_t idx = vma_hugecache_offset(vma, addr);
return region_chg(&inode->i_mapping->private_list,
idx, idx + 1);
@ -815,7 +804,7 @@ static int vma_needs_reservation(struct vm_area_struct *vma, unsigned long addr)
} else {
int err;
pgoff_t idx = vma_pagecache_offset(vma, addr);
pgoff_t idx = vma_hugecache_offset(vma, addr);
struct resv_map *reservations = vma_resv_map(vma);
err = region_chg(&reservations->regions, idx, idx + 1);
@ -831,11 +820,11 @@ static void vma_commit_reservation(struct vm_area_struct *vma,
struct inode *inode = mapping->host;
if (vma->vm_flags & VM_SHARED) {
pgoff_t idx = vma_pagecache_offset(vma, addr);
pgoff_t idx = vma_hugecache_offset(vma, addr);
region_add(&inode->i_mapping->private_list, idx, idx + 1);
} else if (is_vma_resv_set(vma, HPAGE_RESV_OWNER)) {
pgoff_t idx = vma_pagecache_offset(vma, addr);
pgoff_t idx = vma_hugecache_offset(vma, addr);
struct resv_map *reservations = vma_resv_map(vma);
/* Mark this page used in the map. */
@ -1153,8 +1142,8 @@ static void hugetlb_vm_op_close(struct vm_area_struct *vma)
unsigned long end;
if (reservations) {
start = vma_pagecache_offset(vma, vma->vm_start);
end = vma_pagecache_offset(vma, vma->vm_end);
start = vma_hugecache_offset(vma, vma->vm_start);
end = vma_hugecache_offset(vma, vma->vm_end);
reserve = (end - start) -
region_count(&reservations->regions, start, end);
@ -1471,7 +1460,7 @@ static struct page *hugetlbfs_pagecache_page(struct vm_area_struct *vma,
pgoff_t idx;
mapping = vma->vm_file->f_mapping;
idx = vma_pagecache_offset(vma, address);
idx = vma_hugecache_offset(vma, address);
return find_lock_page(mapping, idx);
}
@ -1499,7 +1488,7 @@ static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
}
mapping = vma->vm_file->f_mapping;
idx = vma_pagecache_offset(vma, address);
idx = vma_hugecache_offset(vma, address);
/*
* Use page lock to guard against racing truncation