From: "Gustavo A. R. Silva" gustavoars@kernel.org
mainline-inclusion from mainline-v5.13-rc2 commit 53004ee78d6273c994534ccf79d993098ac89769 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I4KIAO CVE: NA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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In preparation to enable -Wimplicit-fallthrough for Clang, fix the following warnings by replacing /* fall through */ comments, and its variants, with the new pseudo-keyword macro fallthrough:
fs/xfs/libxfs/xfs_alloc.c:3167:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/libxfs/xfs_da_btree.c:286:3: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/libxfs/xfs_ag_resv.c:346:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/libxfs/xfs_ag_resv.c:388:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_bmap_util.c:246:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_export.c:88:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_export.c:96:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_file.c:867:3: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_ioctl.c:562:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_ioctl.c:1548:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_iomap.c:1040:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_inode.c:852:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_log.c:2627:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/xfs_trans_buf.c:298:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/bmap.c:275:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/btree.c:48:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/common.c:85:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/common.c:138:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/common.c:698:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/dabtree.c:51:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/repair.c:951:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough] fs/xfs/scrub/agheader.c:89:2: warning: unannotated fall-through between switch labels [-Wimplicit-fallthrough]
Notice that Clang doesn't recognize /* fall through */ comments as implicit fall-through markings, so in order to globally enable -Wimplicit-fallthrough for Clang, these comments need to be replaced with fallthrough; in the whole codebase.
Link: https://github.com/KSPP/linux/issues/115 Signed-off-by: Gustavo A. R. Silva gustavoars@kernel.org Signed-off-by: Guo Xuenan guoxuenan@huawei.com Reviewed-by: Lihong Kou koulihong@huawei.com Reviewed-by: Zhang Yi yi.zhang@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- fs/xfs/libxfs/xfs_ag_resv.c | 4 ++-- fs/xfs/libxfs/xfs_alloc.c | 2 +- fs/xfs/libxfs/xfs_da_btree.c | 2 +- fs/xfs/scrub/agheader.c | 1 + fs/xfs/scrub/bmap.c | 2 +- fs/xfs/scrub/btree.c | 2 +- fs/xfs/scrub/common.c | 6 +++--- fs/xfs/scrub/dabtree.c | 2 +- fs/xfs/scrub/repair.c | 2 +- fs/xfs/xfs_bmap_util.c | 2 +- fs/xfs/xfs_export.c | 4 ++-- fs/xfs/xfs_file.c | 2 +- fs/xfs/xfs_inode.c | 2 +- fs/xfs/xfs_ioctl.c | 4 ++-- fs/xfs/xfs_iomap.c | 2 +- fs/xfs/xfs_log.c | 1 + fs/xfs/xfs_trans_buf.c | 2 +- 17 files changed, 22 insertions(+), 20 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_ag_resv.c b/fs/xfs/libxfs/xfs_ag_resv.c index 64b04a95fc54..f38034194bd7 100644 --- a/fs/xfs/libxfs/xfs_ag_resv.c +++ b/fs/xfs/libxfs/xfs_ag_resv.c @@ -362,7 +362,7 @@ xfs_ag_resv_alloc_extent( break; default: ASSERT(0); - /* fall through */ + fallthrough; case XFS_AG_RESV_NONE: field = args->wasdel ? XFS_TRANS_SB_RES_FDBLOCKS : XFS_TRANS_SB_FDBLOCKS; @@ -404,7 +404,7 @@ xfs_ag_resv_free_extent( break; default: ASSERT(0); - /* fall through */ + fallthrough; case XFS_AG_RESV_NONE: xfs_trans_mod_sb(tp, XFS_TRANS_SB_FDBLOCKS, (int64_t)len); return; diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c index 6989efd55b5b..6f54f639913f 100644 --- a/fs/xfs/libxfs/xfs_alloc.c +++ b/fs/xfs/libxfs/xfs_alloc.c @@ -3110,7 +3110,7 @@ xfs_alloc_vextent( } args->agbno = XFS_FSB_TO_AGBNO(mp, args->fsbno); args->type = XFS_ALLOCTYPE_NEAR_BNO; - /* FALLTHROUGH */ + fallthrough; case XFS_ALLOCTYPE_FIRST_AG: /* * Rotate through the allocation groups looking for a winner. diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c index e46bc03365db..5a13bfe0ebbf 100644 --- a/fs/xfs/libxfs/xfs_da_btree.c +++ b/fs/xfs/libxfs/xfs_da_btree.c @@ -282,7 +282,7 @@ xfs_da3_node_read_verify( __this_address); break; } - /* fall through */ + fallthrough; case XFS_DA_NODE_MAGIC: fa = xfs_da3_node_verify(bp); if (fa) diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c index de42d667108a..16895b2f0bf9 100644 --- a/fs/xfs/scrub/agheader.c +++ b/fs/xfs/scrub/agheader.c @@ -86,6 +86,7 @@ xchk_superblock( case -ENOSYS: case -EFBIG: error = -EFSCORRUPTED; + fallthrough; default: break; } diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c index fed56d213a3f..e68d5d6a6e6b 100644 --- a/fs/xfs/scrub/bmap.c +++ b/fs/xfs/scrub/bmap.c @@ -272,7 +272,7 @@ xchk_bmap_iextent_xref( case XFS_DATA_FORK: if (xfs_is_reflink_inode(info->sc->ip)) break; - /* fall through */ + fallthrough; case XFS_ATTR_FORK: xchk_xref_is_not_shared(info->sc, agbno, irec->br_blockcount); diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c index debf392e0515..8c81761e52ab 100644 --- a/fs/xfs/scrub/btree.c +++ b/fs/xfs/scrub/btree.c @@ -43,7 +43,7 @@ __xchk_btree_process_error( /* Note the badness but don't abort. */ sc->sm->sm_flags |= errflag; *error = 0; - /* fall through */ + fallthrough; default: if (cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) trace_xchk_ifork_btree_op_error(sc, cur, level, diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c index c8daccf4a62a..54b5e9a61455 100644 --- a/fs/xfs/scrub/common.c +++ b/fs/xfs/scrub/common.c @@ -83,7 +83,7 @@ __xchk_process_error( /* Note the badness but don't abort. */ sc->sm->sm_flags |= errflag; *error = 0; - /* fall through */ + fallthrough; default: trace_xchk_op_error(sc, agno, bno, *error, ret_ip); @@ -136,7 +136,7 @@ __xchk_fblock_process_error( /* Note the badness but don't abort. */ sc->sm->sm_flags |= errflag; *error = 0; - /* fall through */ + fallthrough; default: trace_xchk_file_op_error(sc, whichfork, offset, *error, ret_ip); @@ -715,7 +715,7 @@ xchk_get_inode( if (error) return -ENOENT; error = -EFSCORRUPTED; - /* fall through */ + fallthrough; default: trace_xchk_op_error(sc, XFS_INO_TO_AGNO(mp, sc->sm->sm_ino), diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c index 653f3280e1c1..9f0dbb47c82c 100644 --- a/fs/xfs/scrub/dabtree.c +++ b/fs/xfs/scrub/dabtree.c @@ -47,7 +47,7 @@ xchk_da_process_error( /* Note the badness but don't abort. */ sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; *error = 0; - /* fall through */ + fallthrough; default: trace_xchk_file_op_error(sc, ds->dargs.whichfork, xfs_dir2_da_to_db(ds->dargs.geo, diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c index 25e86c71e7b9..c814b18efba9 100644 --- a/fs/xfs/scrub/repair.c +++ b/fs/xfs/scrub/repair.c @@ -944,7 +944,7 @@ xrep_ino_dqattach( xrep_force_quotacheck(sc, XFS_DQTYPE_GROUP); if (XFS_IS_PQUOTA_ON(sc->mp) && !sc->ip->i_pdquot) xrep_force_quotacheck(sc, XFS_DQTYPE_PROJ); - /* fall through */ + fallthrough; case -ESRCH: error = 0; break; diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c index 7371a7f7c652..32180dd5ee7d 100644 --- a/fs/xfs/xfs_bmap_util.c +++ b/fs/xfs/xfs_bmap_util.c @@ -244,7 +244,7 @@ xfs_bmap_count_blocks( */ *count += btblocks - 1;
- /* fall through */ + fallthrough; case XFS_DINODE_FMT_EXTENTS: *nextents = xfs_bmap_count_leaves(ifp, count); break; diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c index 465fd9e048d4..1da59bdff245 100644 --- a/fs/xfs/xfs_export.c +++ b/fs/xfs/xfs_export.c @@ -84,7 +84,7 @@ xfs_fs_encode_fh( case FILEID_INO32_GEN_PARENT: fid->i32.parent_ino = XFS_I(parent)->i_ino; fid->i32.parent_gen = parent->i_generation; - /*FALLTHRU*/ + fallthrough; case FILEID_INO32_GEN: fid->i32.ino = XFS_I(inode)->i_ino; fid->i32.gen = inode->i_generation; @@ -92,7 +92,7 @@ xfs_fs_encode_fh( case FILEID_INO32_GEN_PARENT | XFS_FILEID_TYPE_64FLAG: fid64->parent_ino = XFS_I(parent)->i_ino; fid64->parent_gen = parent->i_generation; - /*FALLTHRU*/ + fallthrough; case FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG: fid64->ino = XFS_I(inode)->i_ino; fid64->gen = inode->i_generation; diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c index 5b0f93f73837..aeb09b059a23 100644 --- a/fs/xfs/xfs_file.c +++ b/fs/xfs/xfs_file.c @@ -805,7 +805,7 @@ xfs_break_layouts( error = xfs_break_dax_layouts(inode, &retry); if (error || retry) break; - /* fall through */ + fallthrough; case BREAK_WRITE: error = xfs_break_leased_layouts(inode, iolock, &retry); break; diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 2bfbcf28b1bd..b4557a827666 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -907,7 +907,7 @@ xfs_ialloc( xfs_inode_inherit_flags(ip, pip); if (pip && (pip->i_d.di_flags2 & XFS_DIFLAG2_ANY)) xfs_inode_inherit_flags2(ip, pip); - /* FALLTHROUGH */ + fallthrough; case S_IFLNK: ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS; ip->i_df.if_flags = XFS_IFEXTENTS; diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 2a68819e4fe5..f6bb581edc6c 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -557,7 +557,7 @@ xfs_ioc_attrmulti_one( case ATTR_OP_REMOVE: value = NULL; *len = 0; - /* fall through */ + fallthrough; case ATTR_OP_SET: error = mnt_want_write_file(parfilp); if (error) @@ -1669,7 +1669,7 @@ xfs_ioc_getbmap( switch (cmd) { case XFS_IOC_GETBMAPA: bmx.bmv_iflags = BMV_IF_ATTRFORK; - /*FALLTHRU*/ + fallthrough; case XFS_IOC_GETBMAP: if (file->f_mode & FMODE_NOCMTIME) bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 7b9ff824e82d..9d701ce2f703 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -1031,7 +1031,7 @@ xfs_buffered_write_iomap_begin( prealloc_blocks = 0; goto retry; } - /*FALLTHRU*/ + fallthrough; default: goto out_unlock; } diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index b70b7d041d79..82002eee667d 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -2547,6 +2547,7 @@ xlog_covered_state( case XLOG_STATE_COVER_IDLE: if (iclogs_changed == 1) return XLOG_STATE_COVER_IDLE; + fallthrough; case XLOG_STATE_COVER_NEED: case XLOG_STATE_COVER_NEED2: break; diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c index 42d63b830cb9..342817e15ada 100644 --- a/fs/xfs/xfs_trans_buf.c +++ b/fs/xfs/xfs_trans_buf.c @@ -294,7 +294,7 @@ xfs_trans_read_buf_map( default: if (tp && (tp->t_flags & XFS_TRANS_DIRTY)) xfs_force_shutdown(tp->t_mountp, SHUTDOWN_META_IO_ERROR); - /* fall through */ + fallthrough; case -ENOMEM: case -EAGAIN: return error;