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Subject[2.6 patch][3/3] mm/ BUG -> BUG_ON conversions
The patch below does BUG -> BUG_ON conversions in mm/ .

diffstat output:
mm/bootmem.c | 6 ++----
mm/filemap.c | 6 ++----
mm/highmem.c | 15 +++++----------
mm/memory.c | 12 ++++--------
mm/mempool.c | 5 +++--
mm/mmap.c | 12 ++++--------
mm/mprotect.c | 3 +--
mm/msync.c | 3 +--
mm/page_alloc.c | 3 +--
mm/pdflush.c | 3 +--
mm/shmem.c | 3 +--
mm/slab.c | 30 ++++++++++--------------------
mm/swap.c | 12 ++++--------
mm/swap_state.c | 6 ++----
mm/swapfile.c | 6 ++----
mm/vmalloc.c | 3 +--
mm/vmscan.c | 18 ++++++------------
17 files changed, 50 insertions(+), 96 deletions(-)

Signed-off-by: Adrian Bunk <bunk@fs.tum.de>

--- linux-2.6.9-rc1-mm1-full-3.4/mm/bootmem.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/bootmem.c 2004-08-28 16:26:48.000000000 +0200
@@ -125,8 +125,7 @@
sidx = start - (bdata->node_boot_start/PAGE_SIZE);

for (i = sidx; i < eidx; i++) {
- if (unlikely(!test_and_clear_bit(i, bdata->node_bootmem_map)))
- BUG();
+ BUG_ON(!test_and_clear_bit(i, bdata->node_bootmem_map));
}
}

@@ -246,8 +245,7 @@
* Reserve the area now:
*/
for (i = start; i < start+areasize; i++)
- if (unlikely(test_and_set_bit(i, bdata->node_bootmem_map)))
- BUG();
+ BUG_ON(test_and_set_bit(i, bdata->node_bootmem_map));
memset(ret, 0, size);
return ret;
}
--- linux-2.6.9-rc1-mm1-full-3.4/mm/filemap.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/filemap.c 2004-08-28 16:27:22.000000000 +0200
@@ -440,8 +440,7 @@
void fastcall unlock_page(struct page *page)
{
smp_mb__before_clear_bit();
- if (!TestClearPageLocked(page))
- BUG();
+ BUG_ON(!TestClearPageLocked(page));
smp_mb__after_clear_bit();
wake_up_page(page);
}
@@ -455,8 +454,7 @@
void end_page_writeback(struct page *page)
{
if (!TestClearPageReclaim(page) || rotate_reclaimable_page(page)) {
- if (!test_clear_page_writeback(page))
- BUG();
+ BUG_ON(!test_clear_page_writeback(page));
smp_mb__after_clear_bit();
}
wake_up_page(page);
--- linux-2.6.9-rc1-mm1-full-3.4/mm/highmem.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/highmem.c 2004-08-28 16:28:22.000000000 +0200
@@ -79,8 +79,7 @@
pkmap_count[i] = 0;

/* sanity check */
- if (pte_none(pkmap_page_table[i]))
- BUG();
+ BUG_ON(pte_none(pkmap_page_table[i]));

/*
* Don't need an atomic fetch-and-clear op here;
@@ -161,8 +160,7 @@
if (!vaddr)
vaddr = map_new_virtual(page);
pkmap_count[PKMAP_NR(vaddr)]++;
- if (pkmap_count[PKMAP_NR(vaddr)] < 2)
- BUG();
+ BUG_ON(pkmap_count[PKMAP_NR(vaddr)] < 2);
spin_unlock(&kmap_lock);
return (void*) vaddr;
}
@@ -177,8 +175,7 @@

spin_lock(&kmap_lock);
vaddr = (unsigned long)page_address(page);
- if (!vaddr)
- BUG();
+ BUG_ON(!vaddr);
nr = PKMAP_NR(vaddr);

/*
@@ -223,8 +220,7 @@
return 0;

page_pool = mempool_create(POOL_SIZE, page_pool_alloc, page_pool_free, NULL);
- if (!page_pool)
- BUG();
+ BUG_ON(!page_pool);
printk("highmem bounce pool size: %d pages\n", POOL_SIZE);

return 0;
@@ -266,8 +262,7 @@
return 0;

isa_page_pool = mempool_create(ISA_POOL_SIZE, page_pool_alloc, page_pool_free, (void *) __GFP_DMA);
- if (!isa_page_pool)
- BUG();
+ BUG_ON(!isa_page_pool);

printk("isa bounce pool size: %d pages\n", ISA_POOL_SIZE);
return 0;
--- linux-2.6.9-rc1-mm1-full-3.4/mm/memory.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/memory.c 2004-08-28 16:29:24.000000000 +0200
@@ -902,8 +902,7 @@

dir = pgd_offset(mm, address);
flush_cache_range(vma, beg, end);
- if (address >= end)
- BUG();
+ BUG_ON(address >= end);

spin_lock(&mm->page_table_lock);
do {
@@ -986,8 +985,7 @@
phys_addr -= from;
dir = pgd_offset(mm, from);
flush_cache_range(vma, beg, end);
- if (from >= end)
- BUG();
+ BUG_ON(from >= end);

spin_lock(&mm->page_table_lock);
do {
@@ -1766,10 +1764,8 @@

vma = find_vma(current->mm, addr);
write = (vma->vm_flags & VM_WRITE) != 0;
- if (addr >= end)
- BUG();
- if (end > vma->vm_end)
- BUG();
+ BUG_ON(addr >= end);
+ BUG_ON(end > vma->vm_end);
len = (end+PAGE_SIZE-1)/PAGE_SIZE-addr/PAGE_SIZE;
ret = get_user_pages(current, current->mm, addr,
len, write, 0, NULL, NULL);
--- linux-2.6.9-rc1-mm1-full-3.4/mm/mempool.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/mempool.c 2004-08-28 16:30:34.000000000 +0200
@@ -170,8 +170,9 @@
*/
void mempool_destroy(mempool_t *pool)
{
- if (pool->curr_nr != pool->min_nr)
- BUG(); /* There were outstanding elements */
+ /* There were outstanding elements */
+ BUG_ON(pool->curr_nr != pool->min_nr);
+
free_pool(pool);
}
EXPORT_SYMBOL(mempool_destroy);
--- linux-2.6.9-rc1-mm1-full-3.4/mm/mmap.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/mmap.c 2004-08-28 16:31:30.000000000 +0200
@@ -197,8 +197,7 @@
i = browse_rb(&mm->mm_rb);
if (i != mm->map_count)
printk("map_count %d rb %d\n", mm->map_count, i), bug = 1;
- if (bug)
- BUG();
+ BUG_ON(bug);
}
#else
#define validate_mm(mm) do { } while (0)
@@ -333,8 +332,7 @@
struct rb_node ** rb_link, * rb_parent;

__vma = find_vma_prepare(mm, vma->vm_start,&prev, &rb_link, &rb_parent);
- if (__vma && __vma->vm_start < vma->vm_end)
- BUG();
+ BUG_ON(__vma && __vma->vm_start < vma->vm_end);
__vma_link(mm, vma, prev, rb_link, rb_parent);
mm->map_count++;
}
@@ -704,8 +702,7 @@
* (e.g. stash info in next's anon_vma_node when assigning
* an anon_vma, or when trying vma_merge). Another time.
*/
- if (find_vma_prev(vma->vm_mm, vma->vm_start, &near) != vma)
- BUG();
+ BUG_ON(find_vma_prev(vma->vm_mm, vma->vm_start, &near) != vma);
if (!near)
goto none;

@@ -1886,8 +1883,7 @@
vma->vm_pgoff = vma->vm_start >> PAGE_SHIFT;
}
__vma = find_vma_prepare(mm,vma->vm_start,&prev,&rb_link,&rb_parent);
- if (__vma && __vma->vm_start < vma->vm_end)
- BUG();
+ BUG_ON(__vma && __vma->vm_start < vma->vm_end);
vma_link(mm, vma, prev, rb_link, rb_parent);
}

--- linux-2.6.9-rc1-mm1-full-3.4/mm/mprotect.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/mprotect.c 2004-08-28 16:31:49.000000000 +0200
@@ -95,8 +95,7 @@

dir = pgd_offset(current->mm, start);
flush_cache_range(vma, beg, end);
- if (start >= end)
- BUG();
+ BUG_ON(start >= end);
spin_lock(&current->mm->page_table_lock);
do {
change_pmd_range(dir, start, end - start, newprot);
--- linux-2.6.9-rc1-mm1-full-3.4/mm/msync.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/msync.c 2004-08-28 16:32:13.000000000 +0200
@@ -113,8 +113,7 @@
if (is_vm_hugetlb_page(vma))
goto out;

- if (address >= end)
- BUG();
+ BUG_ON(address >= end);
do {
error |= filemap_sync_pmd_range(dir, address, end, vma, flags);
address = (address + PGDIR_SIZE) & PGDIR_MASK;
--- linux-2.6.9-rc1-mm1-full-3.4/mm/page_alloc.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/page_alloc.c 2004-08-28 16:32:49.000000000 +0200
@@ -188,8 +188,7 @@
destroy_compound_page(page, order);
mask = (~0UL) << order;
page_idx = page - base;
- if (page_idx & ~mask)
- BUG();
+ BUG_ON(page_idx & ~mask);
index = page_idx >> (1 + order);

zone->free_pages += 1 << order;
--- linux-2.6.9-rc1-mm1-full-3.4/mm/pdflush.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/pdflush.c 2004-08-28 16:33:22.000000000 +0200
@@ -191,8 +191,7 @@
unsigned long flags;
int ret = 0;

- if (fn == NULL)
- BUG(); /* Hard to diagnose if it's deferred */
+ BUG_ON(fn == NULL); /* Hard to diagnose if it's deferred */

spin_lock_irqsave(&pdflush_lock, flags);
if (list_empty(&pdflush_list)) {
--- linux-2.6.9-rc1-mm1-full-3.4/mm/shmem.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/shmem.c 2004-08-28 16:33:49.000000000 +0200
@@ -1696,8 +1696,7 @@
struct page *page;

page = find_get_page(dentry->d_inode->i_mapping, 0);
- if (!page)
- BUG();
+ BUG_ON(!page);
kunmap(page);
mark_page_accessed(page);
page_cache_release(page);
--- linux-2.6.9-rc1-mm1-full-3.4/mm/slab.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/slab.c 2004-08-28 16:36:04.000000000 +0200
@@ -743,8 +743,7 @@

cache_estimate(0, cache_cache.objsize, cache_line_size(), 0,
&left_over, &cache_cache.num);
- if (!cache_cache.num)
- BUG();
+ BUG_ON(!cache_cache.num);

cache_cache.colour = left_over/cache_cache.colour_off;
cache_cache.colour_next = 0;
@@ -887,8 +886,7 @@
const unsigned long nr_freed = i;

while (i--) {
- if (!TestClearPageSlab(page))
- BUG();
+ BUG_ON(!TestClearPageSlab(page));
page++;
}
sub_page_state(nr_slab, nr_freed);
@@ -1199,8 +1197,7 @@
* Always checks flags, a caller might be expecting debug
* support which isn't available.
*/
- if (flags & ~CREATE_MASK)
- BUG();
+ BUG_ON(flags & ~CREATE_MASK);

if (align) {
/* combinations of forced alignment and advanced debugging is
@@ -1476,8 +1473,7 @@
func(arg);
local_irq_enable();

- if (smp_call_function(func, arg, 1, 1))
- BUG();
+ BUG_ON(smp_call_function(func, arg, 1, 1));

preempt_enable();
}
@@ -1529,8 +1525,7 @@

slabp = list_entry(cachep->lists.slabs_free.prev, struct slab, list);
#if DEBUG
- if (slabp->inuse)
- BUG();
+ BUG_ON(slabp->inuse);
#endif
list_del(&slabp->list);

@@ -1554,8 +1549,7 @@
*/
int kmem_cache_shrink(kmem_cache_t *cachep)
{
- if (!cachep || in_interrupt())
- BUG();
+ BUG_ON(!cachep || in_interrupt());

return __cache_shrink(cachep);
}
@@ -1583,8 +1577,7 @@
{
int i;

- if (!cachep || in_interrupt())
- BUG();
+ BUG_ON(!cachep || in_interrupt());

/* Don't let CPUs to come and go */
lock_cpu_hotplug();
@@ -1703,11 +1696,9 @@
static void kmem_flagcheck(kmem_cache_t *cachep, int flags)
{
if (flags & SLAB_DMA) {
- if (!(cachep->gfpflags & GFP_DMA))
- BUG();
+ BUG_ON(!(cachep->gfpflags & GFP_DMA));
} else {
- if (cachep->gfpflags & GFP_DMA)
- BUG();
+ BUG_ON(cachep->gfpflags & GFP_DMA);
}
}

@@ -1741,8 +1732,7 @@
/* Be lazy and only check for valid flags here,
* keeping it out of the critical path in kmem_cache_alloc().
*/
- if (flags & ~(SLAB_DMA|SLAB_LEVEL_MASK|SLAB_NO_GROW))
- BUG();
+ BUG_ON(flags & ~(SLAB_DMA|SLAB_LEVEL_MASK|SLAB_NO_GROW));
if (flags & SLAB_NO_GROW)
return 0;

--- linux-2.6.9-rc1-mm1-full-3.4/mm/swap.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/swap.c 2004-08-28 16:36:55.000000000 +0200
@@ -90,8 +90,7 @@
list_add_tail(&page->lru, &zone->inactive_list);
inc_page_state(pgrotated);
}
- if (!test_clear_page_writeback(page))
- BUG();
+ BUG_ON(!test_clear_page_writeback(page));
spin_unlock_irqrestore(&zone->lru_lock, flags);
return 0;
}
@@ -302,8 +301,7 @@
zone = pagezone;
spin_lock_irq(&zone->lru_lock);
}
- if (TestSetPageLRU(page))
- BUG();
+ BUG_ON(TestSetPageLRU(page));
add_page_to_inactive_list(zone, page);
}
if (zone)
@@ -329,10 +327,8 @@
zone = pagezone;
spin_lock_irq(&zone->lru_lock);
}
- if (TestSetPageLRU(page))
- BUG();
- if (TestSetPageActive(page))
- BUG();
+ BUG_ON(TestSetPageLRU(page));
+ BUG_ON(TestSetPageActive(page));
add_page_to_active_list(zone, page);
}
if (zone)
--- linux-2.6.9-rc1-mm1-full-3.4/mm/swap_state.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/swap_state.c 2004-08-28 16:37:23.000000000 +0200
@@ -144,8 +144,7 @@
int pf_flags;
int err;

- if (!PageLocked(page))
- BUG();
+ BUG_ON(!PageLocked(page));

for (;;) {
entry = get_swap_page();
@@ -229,8 +228,7 @@
if (!err) {
remove_from_page_cache(page);
page_cache_release(page); /* pagecache ref */
- if (!swap_duplicate(entry))
- BUG();
+ BUG_ON(!swap_duplicate(entry));
SetPageDirty(page);
INC_CACHE_INFO(add_total);
} else if (err == -EEXIST)
--- linux-2.6.9-rc1-mm1-full-3.4/mm/swapfile.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/swapfile.c 2004-08-28 16:37:50.000000000 +0200
@@ -312,8 +312,7 @@
{
int retval = 0;

- if (!PageLocked(page))
- BUG();
+ BUG_ON(!PageLocked(page));
switch (page_count(page)) {
case 3:
if (!PagePrivate(page))
@@ -506,8 +505,7 @@
end = address + size;
if (end > PGDIR_SIZE)
end = PGDIR_SIZE;
- if (address >= end)
- BUG();
+ BUG_ON(address >= end);
do {
foundaddr = unuse_pmd(vma, pmd, address, end - address,
offset, entry, page);
--- linux-2.6.9-rc1-mm1-full-3.4/mm/vmalloc.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/vmalloc.c 2004-08-28 16:38:14.000000000 +0200
@@ -318,8 +318,7 @@
int i;

for (i = 0; i < area->nr_pages; i++) {
- if (unlikely(!area->pages[i]))
- BUG();
+ BUG_ON(!area->pages[i]);
__free_page(area->pages[i]);
}

--- linux-2.6.9-rc1-mm1-full-3.4/mm/vmscan.c.old 2004-08-28 16:25:18.000000000 +0200
+++ linux-2.6.9-rc1-mm1-full-3.4/mm/vmscan.c 2004-08-28 16:39:28.000000000 +0200
@@ -564,8 +564,7 @@
prefetchw_prev_lru_page(page,
&zone->inactive_list, flags);

- if (!TestClearPageLRU(page))
- BUG();
+ BUG_ON(!TestClearPageLRU(page));
list_del(&page->lru);
if (get_page_testone(page)) {
/*
@@ -603,8 +602,7 @@
*/
while (!list_empty(&page_list)) {
page = lru_to_page(&page_list);
- if (TestSetPageLRU(page))
- BUG();
+ BUG_ON(TestSetPageLRU(page));
list_del(&page->lru);
if (PageActive(page))
add_page_to_active_list(zone, page);
@@ -662,8 +660,7 @@
while (pgscanned < nr_pages && !list_empty(&zone->active_list)) {
page = lru_to_page(&zone->active_list);
prefetchw_prev_lru_page(page, &zone->active_list, flags);
- if (!TestClearPageLRU(page))
- BUG();
+ BUG_ON(!TestClearPageLRU(page));
list_del(&page->lru);
if (get_page_testone(page)) {
/*
@@ -735,10 +732,8 @@
while (!list_empty(&l_inactive)) {
page = lru_to_page(&l_inactive);
prefetchw_prev_lru_page(page, &l_inactive, flags);
- if (TestSetPageLRU(page))
- BUG();
- if (!TestClearPageActive(page))
- BUG();
+ BUG_ON(TestSetPageLRU(page));
+ BUG_ON(!TestClearPageActive(page));
list_move(&page->lru, &zone->inactive_list);
pgmoved++;
if (!pagevec_add(&pvec, page)) {
@@ -764,8 +759,7 @@
while (!list_empty(&l_active)) {
page = lru_to_page(&l_active);
prefetchw_prev_lru_page(page, &l_active, flags);
- if (TestSetPageLRU(page))
- BUG();
+ BUG_ON(TestSetPageLRU(page));
BUG_ON(!PageActive(page));
list_move(&page->lru, &zone->active_list);
pgmoved++;
-
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