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[PATCH] __unmap_hugepage_range(): add comment 

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Chen, Kenneth W 2006-12-06 20:31:39 -08:00 committed by Linus Torvalds
parent 0798e5193c
commit c0a499c2c4
1 changed files with 5 additions and 0 deletions
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5
mm/hugetlb.c
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@ -365,6 +365,11 @@ void __unmap_hugepage_range(struct vm_area_struct *vma, unsigned long start,
pte_t pte; pte_t pte;
struct page *page; struct page *page;
struct page *tmp; struct page *tmp;
/*
* A page gathering list, protected by per file i_mmap_lock. The
* lock is used to avoid list corruption from multiple unmapping
* of the same page since we are using page->lru.
*/
LIST_HEAD(page_list); LIST_HEAD(page_list);
WARN_ON(!is_vm_hugetlb_page(vma)); WARN_ON(!is_vm_hugetlb_page(vma));