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 70b17991d89554cdd16f3e4fb0179bcc03c808d9 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_pagevec.h | 2 - drivers/staging/erofs/unzip_vle.c | 35 +++++++++++++--------------------- 2 files changed, 15 insertions(+), 22 deletions(-)
--- a/drivers/staging/erofs/unzip_pagevec.h +++ b/drivers/staging/erofs/unzip_pagevec.h @@ -150,7 +150,7 @@ z_erofs_pagevec_ctor_dequeue(struct z_er erofs_vtptr_t t;
if (unlikely(ctor->index >= ctor->nr)) { - BUG_ON(ctor->next == NULL); + DBG_BUGON(!ctor->next); z_erofs_pagevec_ctor_pagedown(ctor, true); }
--- a/drivers/staging/erofs/unzip_vle.c +++ b/drivers/staging/erofs/unzip_vle.c @@ -18,9 +18,6 @@ static struct kmem_cache *z_erofs_workgr
void z_erofs_exit_zip_subsystem(void) { - BUG_ON(z_erofs_workqueue == NULL); - BUG_ON(z_erofs_workgroup_cachep == NULL); - destroy_workqueue(z_erofs_workqueue); kmem_cache_destroy(z_erofs_workgroup_cachep); } @@ -363,7 +360,10 @@ z_erofs_vle_work_register(struct super_b struct z_erofs_vle_work *work;
/* if multiref is disabled, grp should never be nullptr */ - BUG_ON(grp != NULL); + if (unlikely(grp)) { + DBG_BUGON(1); + return ERR_PTR(-EINVAL); + }
/* no available workgroup, let's allocate one */ grp = kmem_cache_zalloc(z_erofs_workgroup_cachep, GFP_NOFS); @@ -742,7 +742,7 @@ static inline void z_erofs_vle_read_endi bool cachemngd = false;
DBG_BUGON(PageUptodate(page)); - BUG_ON(page->mapping == NULL); + DBG_BUGON(!page->mapping);
#ifdef EROFS_FS_HAS_MANAGED_CACHE if (unlikely(mngda == NULL && !z_erofs_is_stagingpage(page))) { @@ -800,7 +800,7 @@ static int z_erofs_vle_unzip(struct supe
might_sleep(); work = z_erofs_vle_grab_primary_work(grp); - BUG_ON(!READ_ONCE(work->nr_pages)); + DBG_BUGON(!READ_ONCE(work->nr_pages));
mutex_lock(&work->lock); nr_pages = work->nr_pages; @@ -849,8 +849,8 @@ repeat: else pagenr = z_erofs_onlinepage_index(page);
- BUG_ON(pagenr >= nr_pages); - BUG_ON(pages[pagenr] != NULL); + DBG_BUGON(pagenr >= nr_pages); + DBG_BUGON(pages[pagenr]);
pages[pagenr] = page; } @@ -873,9 +873,8 @@ repeat: if (z_erofs_is_stagingpage(page)) continue; #ifdef EROFS_FS_HAS_MANAGED_CACHE - else if (page->mapping == mngda) { - BUG_ON(PageLocked(page)); - BUG_ON(!PageUptodate(page)); + if (page->mapping == mngda) { + DBG_BUGON(!PageUptodate(page)); continue; } #endif @@ -883,8 +882,8 @@ repeat: /* only non-head page could be reused as a compressed page */ pagenr = z_erofs_onlinepage_index(page);
- BUG_ON(pagenr >= nr_pages); - BUG_ON(pages[pagenr] != NULL); + DBG_BUGON(pagenr >= nr_pages); + DBG_BUGON(pages[pagenr]); ++sparsemem_pages; pages[pagenr] = page;
@@ -894,9 +893,6 @@ repeat: llen = (nr_pages << PAGE_SHIFT) - work->pageofs;
if (z_erofs_vle_workgrp_fmt(grp) == Z_EROFS_VLE_WORKGRP_FMT_PLAIN) { - /* FIXME! this should be fixed in the future */ - BUG_ON(grp->llen != llen); - err = z_erofs_vle_plain_copy(compressed_pages, clusterpages, pages, nr_pages, work->pageofs); goto out; @@ -911,10 +907,8 @@ repeat: if (err != -ENOTSUPP) goto out_percpu;
- if (sparsemem_pages >= nr_pages) { - BUG_ON(sparsemem_pages > nr_pages); + if (sparsemem_pages >= nr_pages) goto skip_allocpage; - }
for (i = 0; i < nr_pages; ++i) { if (pages[i] != NULL) @@ -1007,7 +1001,7 @@ static void z_erofs_vle_unzip_wq(struct struct z_erofs_vle_unzip_io_sb, io.u.work); LIST_HEAD(page_pool);
- BUG_ON(iosb->io.head == Z_EROFS_VLE_WORKGRP_TAIL_CLOSED); + DBG_BUGON(iosb->io.head == Z_EROFS_VLE_WORKGRP_TAIL_CLOSED); z_erofs_vle_unzip_all(iosb->sb, &iosb->io, &page_pool);
put_pages_list(&page_pool); @@ -1336,7 +1330,6 @@ static inline int __z_erofs_vle_normalac continue; }
- BUG_ON(PagePrivate(page)); set_page_private(page, (unsigned long)head); head = page; }