mm: convert a few VM_BUG_ON callers to VM_BUG_ON_VMA

Trivially convert a few VM_BUG_ON calls to VM_BUG_ON_VMA to extract more information when they trigger. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Rik van Riel <riel@redhat.com> Cc: Mel Gorman <mgorman@suse.de> Cc: Michal Hocko <mhocko@suse.cz> Cc: Hugh Dickins <hughd@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Michel Lespinasse <walken@google.com> Cc: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
aixiaorenzhe · Oct 10, 2014 · 81d1b09 · 81d1b09
1 parent fa3759c
commit 81d1b09
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Showing 9 changed files with 24 additions and 23 deletions.
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h
@@ -132,7 +132,7 @@ extern int __pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma,
 static inline int pmd_trans_huge_lock(pmd_t *pmd, struct vm_area_struct *vma,
 		spinlock_t **ptl)
 {
-	VM_BUG_ON(!rwsem_is_locked(&vma->vm_mm->mmap_sem));
+	VM_BUG_ON_VMA(!rwsem_is_locked(&vma->vm_mm->mmap_sem), vma);
 	if (pmd_trans_huge(*pmd))
 		return __pmd_trans_huge_lock(pmd, vma, ptl);
 	else

diff --git a/include/linux/rmap.h b/include/linux/rmap.h
@@ -150,7 +150,7 @@ int anon_vma_fork(struct vm_area_struct *, struct vm_area_struct *);
 static inline void anon_vma_merge(struct vm_area_struct *vma,
 				  struct vm_area_struct *next)
 {
-	VM_BUG_ON(vma->anon_vma != next->anon_vma);
+	VM_BUG_ON_VMA(vma->anon_vma != next->anon_vma, vma);
 	unlink_anon_vmas(next);
 }
 

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
@@ -1096,7 +1096,7 @@ int do_huge_pmd_wp_page(struct mm_struct *mm, struct vm_area_struct *vma,
 	unsigned long mmun_end;		/* For mmu_notifiers */
 
 	ptl = pmd_lockptr(mm, pmd);
-	VM_BUG_ON(!vma->anon_vma);
+	VM_BUG_ON_VMA(!vma->anon_vma, vma);
 	haddr = address & HPAGE_PMD_MASK;
 	if (is_huge_zero_pmd(orig_pmd))
 		goto alloc;
@@ -2083,7 +2083,7 @@ int khugepaged_enter_vma_merge(struct vm_area_struct *vma)
 	if (vma->vm_ops)
 		/* khugepaged not yet working on file or special mappings */
 		return 0;
-	VM_BUG_ON(vma->vm_flags & VM_NO_THP);
+	VM_BUG_ON_VMA(vma->vm_flags & VM_NO_THP, vma);
 	hstart = (vma->vm_start + ~HPAGE_PMD_MASK) & HPAGE_PMD_MASK;
 	hend = vma->vm_end & HPAGE_PMD_MASK;
 	if (hstart < hend)
@@ -2406,7 +2406,7 @@ static bool hugepage_vma_check(struct vm_area_struct *vma)
 		return false;
 	if (is_vma_temporary_stack(vma))
 		return false;
-	VM_BUG_ON(vma->vm_flags & VM_NO_THP);
+	VM_BUG_ON_VMA(vma->vm_flags & VM_NO_THP, vma);
 	return true;
 }
 

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
@@ -434,7 +434,7 @@ static inline struct resv_map *inode_resv_map(struct inode *inode)
 
 static struct resv_map *vma_resv_map(struct vm_area_struct *vma)
 {
-	VM_BUG_ON(!is_vm_hugetlb_page(vma));
+	VM_BUG_ON_VMA(!is_vm_hugetlb_page(vma), vma);
 	if (vma->vm_flags & VM_MAYSHARE) {
 		struct address_space *mapping = vma->vm_file->f_mapping;
 		struct inode *inode = mapping->host;
@@ -449,32 +449,32 @@ static struct resv_map *vma_resv_map(struct vm_area_struct *vma)
 
 static void set_vma_resv_map(struct vm_area_struct *vma, struct resv_map *map)
 {
-	VM_BUG_ON(!is_vm_hugetlb_page(vma));
-	VM_BUG_ON(vma->vm_flags & VM_MAYSHARE);
+	VM_BUG_ON_VMA(!is_vm_hugetlb_page(vma), vma);
+	VM_BUG_ON_VMA(vma->vm_flags & VM_MAYSHARE, vma);
 
 	set_vma_private_data(vma, (get_vma_private_data(vma) &
 				HPAGE_RESV_MASK) | (unsigned long)map);
 }
 
 static void set_vma_resv_flags(struct vm_area_struct *vma, unsigned long flags)
 {
-	VM_BUG_ON(!is_vm_hugetlb_page(vma));
-	VM_BUG_ON(vma->vm_flags & VM_MAYSHARE);
+	VM_BUG_ON_VMA(!is_vm_hugetlb_page(vma), vma);
+	VM_BUG_ON_VMA(vma->vm_flags & VM_MAYSHARE, vma);
 
 	set_vma_private_data(vma, get_vma_private_data(vma) | flags);
 }
 
 static int is_vma_resv_set(struct vm_area_struct *vma, unsigned long flag)
 {
-	VM_BUG_ON(!is_vm_hugetlb_page(vma));
+	VM_BUG_ON_VMA(!is_vm_hugetlb_page(vma), vma);
 
 	return (get_vma_private_data(vma) & flag) != 0;
 }
 
 /* Reset counters to 0 and clear all HPAGE_RESV_* flags */
 void reset_vma_resv_huge_pages(struct vm_area_struct *vma)
 {
-	VM_BUG_ON(!is_vm_hugetlb_page(vma));
+	VM_BUG_ON_VMA(!is_vm_hugetlb_page(vma), vma);
 	if (!(vma->vm_flags & VM_MAYSHARE))
 		vma->vm_private_data = (void *)0;
 }

diff --git a/mm/interval_tree.c b/mm/interval_tree.c
@@ -34,7 +34,7 @@ void vma_interval_tree_insert_after(struct vm_area_struct *node,
 	struct vm_area_struct *parent;
 	unsigned long last = vma_last_pgoff(node);
 
-	VM_BUG_ON(vma_start_pgoff(node) != vma_start_pgoff(prev));
+	VM_BUG_ON_VMA(vma_start_pgoff(node) != vma_start_pgoff(prev), node);
 
 	if (!prev->shared.linear.rb.rb_right) {
 		parent = prev;

diff --git a/mm/mlock.c b/mm/mlock.c
@@ -233,8 +233,8 @@ long __mlock_vma_pages_range(struct vm_area_struct *vma,
 
 	VM_BUG_ON(start & ~PAGE_MASK);
 	VM_BUG_ON(end   & ~PAGE_MASK);
-	VM_BUG_ON(start < vma->vm_start);
-	VM_BUG_ON(end   > vma->vm_end);
+	VM_BUG_ON_VMA(start < vma->vm_start, vma);
+	VM_BUG_ON_VMA(end   > vma->vm_end, vma);
 	VM_BUG_ON(!rwsem_is_locked(&mm->mmap_sem));
 
 	gup_flags = FOLL_TOUCH | FOLL_MLOCK;

diff --git a/mm/mmap.c b/mm/mmap.c
@@ -786,8 +786,8 @@ again:			remove_next = 1 + (end > next->vm_end);
 	if (!anon_vma && adjust_next)
 		anon_vma = next->anon_vma;
 	if (anon_vma) {
-		VM_BUG_ON(adjust_next && next->anon_vma &&
-			  anon_vma != next->anon_vma);
+		VM_BUG_ON_VMA(adjust_next && next->anon_vma &&
+			  anon_vma != next->anon_vma, next);
 		anon_vma_lock_write(anon_vma);
 		anon_vma_interval_tree_pre_update_vma(vma);
 		if (adjust_next)
@@ -2848,7 +2848,7 @@ struct vm_area_struct *copy_vma(struct vm_area_struct **vmap,
 			 * safe. It is only safe to keep the vm_pgoff
 			 * linear if there are no pages mapped yet.
 			 */
-			VM_BUG_ON(faulted_in_anon_vma);
+			VM_BUG_ON_VMA(faulted_in_anon_vma, new_vma);
 			*vmap = vma = new_vma;
 		}
 		*need_rmap_locks = (new_vma->vm_pgoff <= vma->vm_pgoff);

diff --git a/mm/mremap.c b/mm/mremap.c
@@ -195,7 +195,8 @@ unsigned long move_page_tables(struct vm_area_struct *vma,
 		if (pmd_trans_huge(*old_pmd)) {
 			int err = 0;
 			if (extent == HPAGE_PMD_SIZE) {
-				VM_BUG_ON(vma->vm_file || !vma->anon_vma);
+				VM_BUG_ON_VMA(vma->vm_file || !vma->anon_vma,
+					      vma);
 				/* See comment in move_ptes() */
 				if (need_rmap_locks)
 					anon_vma_lock_write(vma->anon_vma);

diff --git a/mm/rmap.c b/mm/rmap.c
@@ -527,7 +527,7 @@ vma_address(struct page *page, struct vm_area_struct *vma)
 	unsigned long address = __vma_address(page, vma);
 
 	/* page should be within @vma mapping range */
-	VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
+	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
 
 	return address;
 }
@@ -897,7 +897,7 @@ void page_move_anon_rmap(struct page *page,
 	struct anon_vma *anon_vma = vma->anon_vma;
 
 	VM_BUG_ON_PAGE(!PageLocked(page), page);
-	VM_BUG_ON(!anon_vma);
+	VM_BUG_ON_VMA(!anon_vma, vma);
 	VM_BUG_ON_PAGE(page->index != linear_page_index(vma, address), page);
 
 	anon_vma = (void *) anon_vma + PAGE_MAPPING_ANON;
@@ -1024,7 +1024,7 @@ void do_page_add_anon_rmap(struct page *page,
 void page_add_new_anon_rmap(struct page *page,
 	struct vm_area_struct *vma, unsigned long address)
 {
-	VM_BUG_ON(address < vma->vm_start || address >= vma->vm_end);
+	VM_BUG_ON_VMA(address < vma->vm_start || address >= vma->vm_end, vma);
 	SetPageSwapBacked(page);
 	atomic_set(&page->_mapcount, 0); /* increment count (starts at -1) */
 	if (PageTransHuge(page))
@@ -1670,7 +1670,7 @@ static int rmap_walk_file(struct page *page, struct rmap_walk_control *rwc)
 	 * structure at mapping cannot be freed and reused yet,
 	 * so we can safely take mapping->i_mmap_mutex.
 	 */
-	VM_BUG_ON(!PageLocked(page));
+	VM_BUG_ON_PAGE(!PageLocked(page), page);
 
 	if (!mapping)
 		return ret;