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thp: remove unused vma parameter from khugepaged_alloc_page

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The "vma" parameter to khugepaged_alloc_page() is unused.  It has to
remain unused or the drop read lock 'map_sem' optimisation introduce by
commit 8b1645685a ("mm, THP: don't hold mmap_sem in khugepaged when
allocating THP") wouldn't be safe.  So let's remove it.

Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Aaron Tomlin 2015-11-06 16:28:52 -08:00 committed by Linus Torvalds
parent c62d25556b
commit d6669d689f
1 changed files with 3 additions and 5 deletions
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8
mm/huge_memory.c
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@ -2413,8 +2413,7 @@ static bool khugepaged_prealloc_page(struct page **hpage, bool *wait)
static struct page *
khugepaged_alloc_page(struct page **hpage, gfp_t gfp, struct mm_struct *mm,
struct vm_area_struct *vma, unsigned long address,
int node)
unsigned long address, int node)
{
VM_BUG_ON_PAGE(*hpage, *hpage);
@ -2481,8 +2480,7 @@ static bool khugepaged_prealloc_page(struct page **hpage, bool *wait)
static struct page *
khugepaged_alloc_page(struct page **hpage, gfp_t gfp, struct mm_struct *mm,
struct vm_area_struct *vma, unsigned long address,
int node)
unsigned long address, int node)
{
up_read(&mm->mmap_sem);
VM_BUG_ON(!*hpage);
@ -2530,7 +2528,7 @@ static void collapse_huge_page(struct mm_struct *mm,
__GFP_THISNODE;
/* release the mmap_sem read lock. */
new_page = khugepaged_alloc_page(hpage, gfp, mm, vma, address, node);
new_page = khugepaged_alloc_page(hpage, gfp, mm, address, node);
if (!new_page)
return;