fs/affs/file.c: use BUG_ON

if (...) BUG(); should be replaced with BUG_ON(...) when the test has no
side-effects to allow a definition of BUG_ON that drops the code completely.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@ disable unlikely @ expression E,f; @@

(
  if (<... f(...) ...>) { BUG(); }
|
- if (unlikely(E)) { BUG(); }
+ BUG_ON(E);
)

@@ expression E,f; @@

(
  if (<... f(...) ...>) { BUG(); }
|
- if (E) { BUG(); }
+ BUG_ON(E);
)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/affs/file.c b/fs/affs/file.c
index 6e0c9399200e84a74d163e25505d087487a2262d..e87ede608f77e303cfe55ffe0a51a242f51b1109 100644 (file)
--- a/fs/affs/file.c
+++ b/fs/affs/file.c
@@ -325,8 +325,7 @@ affs_get_block(struct inode *inode, sector_t block, struct buffer_head *bh_resul
        pr_debug("AFFS: get_block(%u, %lu)\n", (u32)inode->i_ino, (unsigned long)block);
 
 
-       if (block > (sector_t)0x7fffffffUL)
-               BUG();
+       BUG_ON(block > (sector_t)0x7fffffffUL);
 
        if (block >= AFFS_I(inode)->i_blkcnt) {
                if (block > AFFS_I(inode)->i_blkcnt || !create)
@@ -493,8 +492,7 @@ affs_do_readpage_ofs(struct file *file, struct page *page, unsigned from, unsign
        u32 tmp;
 
        pr_debug("AFFS: read_page(%u, %ld, %d, %d)\n", (u32)inode->i_ino, page->index, from, to);
-       if (from > to || to > PAGE_CACHE_SIZE)
-               BUG();
+       BUG_ON(from > to || to > PAGE_CACHE_SIZE);
        kmap(page);
        data = page_address(page);
        bsize = AFFS_SB(sb)->s_data_blksize;
@@ -507,8 +505,7 @@ affs_do_readpage_ofs(struct file *file, struct page *page, unsigned from, unsign
                if (IS_ERR(bh))
                        return PTR_ERR(bh);
                tmp = min(bsize - boff, to - from);
-               if (from + tmp > to || tmp > bsize)
-                       BUG();
+               BUG_ON(from + tmp > to || tmp > bsize);
                memcpy(data + from, AFFS_DATA(bh) + boff, tmp);
                affs_brelse(bh);
                bidx++;
@@ -540,8 +537,7 @@ affs_extent_file_ofs(struct inode *inode, u32 newsize)
                if (IS_ERR(bh))
                        return PTR_ERR(bh);
                tmp = min(bsize - boff, newsize - size);
-               if (boff + tmp > bsize || tmp > bsize)
-                       BUG();
+               BUG_ON(boff + tmp > bsize || tmp > bsize);
                memset(AFFS_DATA(bh) + boff, 0, tmp);
                AFFS_DATA_HEAD(bh)->size = cpu_to_be32(be32_to_cpu(AFFS_DATA_HEAD(bh)->size) + tmp);
                affs_fix_checksum(sb, bh);
@@ -560,8 +556,7 @@ affs_extent_file_ofs(struct inode *inode, u32 newsize)
                if (IS_ERR(bh))
                        goto out;
                tmp = min(bsize, newsize - size);
-               if (tmp > bsize)
-                       BUG();
+               BUG_ON(tmp > bsize);
                AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);
                AFFS_DATA_HEAD(bh)->key = cpu_to_be32(inode->i_ino);
                AFFS_DATA_HEAD(bh)->sequence = cpu_to_be32(bidx);
@@ -683,8 +678,7 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
                if (IS_ERR(bh))
                        return PTR_ERR(bh);
                tmp = min(bsize - boff, to - from);
-               if (boff + tmp > bsize || tmp > bsize)
-                       BUG();
+               BUG_ON(boff + tmp > bsize || tmp > bsize);
                memcpy(AFFS_DATA(bh) + boff, data + from, tmp);
                AFFS_DATA_HEAD(bh)->size = cpu_to_be32(be32_to_cpu(AFFS_DATA_HEAD(bh)->size) + tmp);
                affs_fix_checksum(sb, bh);
@@ -732,8 +726,7 @@ static int affs_write_end_ofs(struct file *file, struct address_space *mapping,
                if (IS_ERR(bh))
                        goto out;
                tmp = min(bsize, to - from);
-               if (tmp > bsize)
-                       BUG();
+               BUG_ON(tmp > bsize);
                memcpy(AFFS_DATA(bh), data + from, tmp);
                if (buffer_new(bh)) {
                        AFFS_DATA_HEAD(bh)->ptype = cpu_to_be32(T_DATA);