From 70b17991d89554cdd16f3e4fb0179bcc03c808d9 Mon Sep 17 00:00:00 2001 From: Gao Xiang Date: Tue, 11 Dec 2018 15:17:49 +0800 Subject: [PATCH] staging: erofs: unzip_{pagevec.h,vle.c}: rectify BUG_ONs remove all redundant BUG_ONs, and turn the rest useful usages to DBG_BUGONs. Signed-off-by: Gao Xiang Reviewed-by: Chao Yu Signed-off-by: Greg Kroah-Hartman --- drivers/staging/erofs/unzip_pagevec.h | 2 +- drivers/staging/erofs/unzip_vle.c | 33 +++++++++++++-------------------- 2 files changed, 14 insertions(+), 21 deletions(-) diff --git a/drivers/staging/erofs/unzip_pagevec.h b/drivers/staging/erofs/unzip_pagevec.h index 0956615..23856ba 100644 --- 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_erofs_pagevec_ctor *ctor, 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); } diff --git a/drivers/staging/erofs/unzip_vle.c b/drivers/staging/erofs/unzip_vle.c index 500046f..4ac1099 100644 --- a/drivers/staging/erofs/unzip_vle.c +++ b/drivers/staging/erofs/unzip_vle.c @@ -41,9 +41,6 @@ static struct kmem_cache *z_erofs_workgroup_cachep __read_mostly; void z_erofs_exit_zip_subsystem(void) { - BUG_ON(!z_erofs_workqueue); - BUG_ON(!z_erofs_workgroup_cachep); - destroy_workqueue(z_erofs_workqueue); kmem_cache_destroy(z_erofs_workgroup_cachep); } @@ -445,7 +442,10 @@ z_erofs_vle_work_register(const struct z_erofs_vle_work_finder *f, struct z_erofs_vle_work *work; /* if multiref is disabled, grp should never be nullptr */ - BUG_ON(grp); + if (unlikely(grp)) { + DBG_BUGON(1); + return ERR_PTR(-EINVAL); + } /* no available workgroup, let's allocate one */ grp = kmem_cache_alloc(z_erofs_workgroup_cachep, GFP_NOFS); @@ -836,7 +836,7 @@ static inline void z_erofs_vle_read_endio(struct bio *bio) bool cachemngd = false; DBG_BUGON(PageUptodate(page)); - BUG_ON(!page->mapping); + DBG_BUGON(!page->mapping); #ifdef EROFS_FS_HAS_MANAGED_CACHE if (unlikely(!mc && !z_erofs_is_stagingpage(page))) { @@ -891,7 +891,7 @@ static int z_erofs_vle_unzip(struct super_block *sb, 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; @@ -940,8 +940,8 @@ repeat: else pagenr = z_erofs_onlinepage_index(page); - BUG_ON(pagenr >= nr_pages); - BUG_ON(pages[pagenr]); + DBG_BUGON(pagenr >= nr_pages); + DBG_BUGON(pages[pagenr]); pages[pagenr] = page; } @@ -965,8 +965,7 @@ repeat: continue; #ifdef EROFS_FS_HAS_MANAGED_CACHE if (page->mapping == MNGD_MAPPING(sbi)) { - BUG_ON(PageLocked(page)); - BUG_ON(!PageUptodate(page)); + DBG_BUGON(!PageUptodate(page)); continue; } #endif @@ -974,8 +973,8 @@ 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]); + DBG_BUGON(pagenr >= nr_pages); + DBG_BUGON(pages[pagenr]); ++sparsemem_pages; pages[pagenr] = page; @@ -985,9 +984,6 @@ 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; @@ -1002,10 +998,8 @@ 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]) @@ -1098,7 +1092,7 @@ static void z_erofs_vle_unzip_wq(struct work_struct *work) 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); @@ -1535,7 +1529,6 @@ static int z_erofs_vle_normalaccess_readpages(struct file *filp, continue; } - BUG_ON(PagePrivate(page)); set_page_private(page, (unsigned long)head); head = page; } -- 2.7.4