4.19-stable review patch. If anyone has any objections, please let me know.
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From: Gao Xiang gaoxiang25@huawei.com
commit b8e076a6ef253e763bfdb81e5c72bcc828b0fbeb upstream.
remove all redundant BUG_ONs, and turn the rest useful usages to DBG_BUGONs.
Signed-off-by: Gao Xiang gaoxiang25@huawei.com Reviewed-by: Chao Yu yuchao0@huawei.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/staging/erofs/unzip_vle_lz4.c | 2 +- drivers/staging/erofs/utils.c | 12 ++++++------ 2 files changed, 7 insertions(+), 7 deletions(-)
--- a/drivers/staging/erofs/unzip_vle_lz4.c +++ b/drivers/staging/erofs/unzip_vle_lz4.c @@ -57,7 +57,7 @@ int z_erofs_vle_plain_copy(struct page * if (compressed_pages[j] != page) continue;
- BUG_ON(mirrored[j]); + DBG_BUGON(mirrored[j]); memcpy(percpu_data + j * PAGE_SIZE, dst, PAGE_SIZE); mirrored[j] = true; break; --- a/drivers/staging/erofs/utils.c +++ b/drivers/staging/erofs/utils.c @@ -23,9 +23,6 @@ struct page *erofs_allocpage(struct list list_del(&page->lru); } else { page = alloc_pages(gfp | __GFP_NOFAIL, 0); - - BUG_ON(page == NULL); - BUG_ON(page->mapping != NULL); } return page; } @@ -60,7 +57,7 @@ repeat: /* decrease refcount added by erofs_workgroup_put */ if (unlikely(oldcount == 1)) atomic_long_dec(&erofs_global_shrink_cnt); - BUG_ON(index != grp->index); + DBG_BUGON(index != grp->index); } rcu_read_unlock(); return grp; @@ -73,8 +70,11 @@ int erofs_register_workgroup(struct supe struct erofs_sb_info *sbi; int err;
- /* grp->refcount should not < 1 */ - BUG_ON(!atomic_read(&grp->refcount)); + /* grp shouldn't be broken or used before */ + if (unlikely(atomic_read(&grp->refcount) != 1)) { + DBG_BUGON(1); + return -EINVAL; + }
err = radix_tree_preload(GFP_NOFS); if (err)