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Date: Thu, 9 Jun 2011 23:06:31 -0600
From: Andreas Dilger <adilger@...mcloud.com>
To: Andreas Dilger <adilger@...mcloud.com>
Cc: tytso@....edu, linux-ext4@...r.kernel.org
Subject: Re: [PATCH] misc: clean up compiler warnings
I'm starting to send a bunch of patches that have accumulated on the Lustre
e2fsprogs branch. The initial ones, like this, shouldn't controversial.
They are based against the current git master branch.
On 2011-06-09, at 10:52 PM, Andreas Dilger wrote:
> Fix several types of compiler warnings (unused variables/labels),
> uninitialized variables, etc that are hit with gcc -Wall.
>
> Signed-off-by: Andreas Dilger <adilger@...mcloud.com>
> ---
> debugfs/debugfs.c | 5 ++---
> debugfs/debugfs.h | 1 +
> debugfs/dump.c | 2 ++
> e2fsck/message.c | 1 -
> e2fsck/pass1.c | 5 +++--
> e2fsck/pass2.c | 3 ++-
> e2fsck/pass5.c | 1 -
> e2fsck/rehash.c | 3 ++-
> e2fsprogs.spec.in | 1 +
> lib/blkid/probe.c | 7 ++++---
> lib/e2p/ls.c | 4 ++--
> lib/ext2fs/ext2fs.h | 3 ++-
> lib/ext2fs/fileio.c | 2 +-
> lib/ext2fs/openfs.c | 1 -
> lib/ext2fs/progress.c | 2 --
> lib/ext2fs/res_gdt.c | 2 +-
> lib/ext2fs/unix_io.c | 2 ++
> misc/badblocks.c | 2 ++
> misc/e2freefrag.c | 4 ++--
> misc/e2undo.c | 9 ++++-----
> misc/tune2fs.c | 5 ++---
> 21 files changed, 35 insertions(+), 30 deletions(-)
>
> diff --git a/debugfs/debugfs.c b/debugfs/debugfs.c
> index e441bc5..55d16af 100644
> --- a/debugfs/debugfs.c
> +++ b/debugfs/debugfs.c
> @@ -855,7 +855,7 @@ void do_stat(int argc, char *argv[])
> return;
> }
>
> -void do_dump_extents(int argc, char *argv[])
> +void do_dump_extents(int argc, char **argv)
> {
> struct ext2_inode inode;
> ext2_ino_t ino;
> @@ -876,8 +876,7 @@ void do_dump_extents(int argc, char *argv[])
> }
> }
>
> - if (argc != optind+1) {
> - print_usage:
> + if (argc != optind + 1) {
> com_err(0, 0, "Usage: dump_extents [-n] [-l] file");
> return;
> }
> diff --git a/debugfs/debugfs.h b/debugfs/debugfs.h
> index 4cc8a1f..f7ec8da 100644
> --- a/debugfs/debugfs.h
> +++ b/debugfs/debugfs.h
> @@ -103,6 +103,7 @@ extern void do_unlink(int argc, char **argv);
> extern void do_find_free_block(int argc, char **argv);
> extern void do_find_free_inode(int argc, char **argv);
> extern void do_stat(int argc, char **argv);
> +extern void do_dump_extents(int argc, char **argv);
>
> extern void do_chroot(int argc, char **argv);
> extern void do_clri(int argc, char **argv);
> diff --git a/debugfs/dump.c b/debugfs/dump.c
> index ab0d68b..4cf0752 100644
> --- a/debugfs/dump.c
> +++ b/debugfs/dump.c
> @@ -5,7 +5,9 @@
> * under the terms of the GNU Public License.
> */
>
> +#ifndef _GNU_SOURCE
> #define _GNU_SOURCE /* for O_LARGEFILE */
> +#endif
>
> #include <stdio.h>
> #include <unistd.h>
> diff --git a/e2fsck/message.c b/e2fsck/message.c
> index a5f8947..d560cf8 100644
> --- a/e2fsck/message.c
> +++ b/e2fsck/message.c
> @@ -263,7 +263,6 @@ static _INLINE_ void expand_inode_expression(ext2_filsys fs, char ch,
> {
> struct ext2_inode *inode;
> struct ext2_inode_large *large_inode;
> - time_t t;
>
> if (!ctx || !ctx->inode)
> goto no_inode;
> diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
> index 67dd986..d182d1d 100644
> --- a/e2fsck/pass1.c
> +++ b/e2fsck/pass1.c
> @@ -404,7 +404,7 @@ static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
> struct ext2_dir_entry *dirent;
> const char *old_op;
> errcode_t retval;
> - blk64_t blk, first_dir_blk;
> + blk64_t blk;
> unsigned int i, rec_len, not_device = 0;
> int extent_fs;
>
> @@ -436,7 +436,8 @@ static void check_is_really_dir(e2fsck_t ctx, struct problem_context *pctx,
> * with it.
> */
>
> - extent_fs = (ctx->fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS);
> + extent_fs = (ctx->fs->super->s_feature_incompat &
> + EXT3_FEATURE_INCOMPAT_EXTENTS);
> if (extent_fs && (inode->i_flags & EXT4_EXTENTS_FL)) {
> /* extent mapped */
> if (ext2fs_bmap2(ctx->fs, pctx->ino, inode, 0, 0, 0, 0,
> diff --git a/e2fsck/pass2.c b/e2fsck/pass2.c
> index 8d1cbc6..b97a0b3 100644
> --- a/e2fsck/pass2.c
> +++ b/e2fsck/pass2.c
> @@ -404,7 +404,8 @@ static int check_dotdot(e2fsck_t ctx,
> struct ext2_dir_entry *dirent,
> ext2_ino_t ino, struct problem_context *pctx)
> {
> - int rec_len, problem = 0;
> + int problem = 0;
> + unsigned int rec_len;
>
> if (!dirent->inode)
> problem = PR_2_MISSING_DOT_DOT;
> diff --git a/e2fsck/pass5.c b/e2fsck/pass5.c
> index b423d28..3d9874f 100644
> --- a/e2fsck/pass5.c
> +++ b/e2fsck/pass5.c
> @@ -77,7 +77,6 @@ static void e2fsck_discard_blocks(e2fsck_t ctx, io_manager manager,
> blk64_t start, blk64_t count)
> {
> ext2_filsys fs = ctx->fs;
> - int ret = 0;
>
> /*
> * If the filesystem has changed it means that there was an corruption
> diff --git a/e2fsck/rehash.c b/e2fsck/rehash.c
> index 5543134..e8af323 100644
> --- a/e2fsck/rehash.c
> +++ b/e2fsck/rehash.c
> @@ -430,12 +430,13 @@ static errcode_t copy_dir_entries(e2fsck_t ctx,
> return retval;
> dirent = (struct ext2_dir_entry *) block_start;
> prev_rec_len = 0;
> + rec_len = 0;
> left = fs->blocksize;
> slack = fd->compress ? 12 :
> (fs->blocksize * ctx->htree_slack_percentage)/100;
> if (slack < 12)
> slack = 12;
> - for (i=0; i < fd->num_array; i++) {
> + for (i = 0; i < fd->num_array; i++) {
> ent = fd->harray + i;
> if (ent->dir->inode == 0)
> continue;
> diff --git a/e2fsprogs.spec.in b/e2fsprogs.spec.in
> index 6fc23a7..b188b75 100644
> --- a/e2fsprogs.spec.in
> +++ b/e2fsprogs.spec.in
> @@ -212,6 +212,7 @@ exit 0
> %{_includedir}/blkid
> %{_includedir}/e2p
> %{_includedir}/et
> +%{_includedir}/com_err.h
> %{_includedir}/ext2fs
> %{_includedir}/ss
> %{_includedir}/uuid
> diff --git a/lib/blkid/probe.c b/lib/blkid/probe.c
> index 6b75732..e6131fb 100644
> --- a/lib/blkid/probe.c
> +++ b/lib/blkid/probe.c
> @@ -248,7 +248,7 @@ static int linux_version_code()
> {
> #ifdef __linux__
> struct utsname ut;
> - static version_code = -1;
> + static int version_code = -1;
> int major, minor, rev;
> char *endptr;
> const char *cp;
> @@ -1175,7 +1175,7 @@ static int probe_hfs(struct blkid_probe *probe __BLKID_ATTR((unused)),
> sprintf(uuid_str, "%016llX", uuid);
> blkid_set_tag(probe->dev, "UUID", uuid_str, 0);
> }
> - blkid_set_tag(probe->dev, "LABEL", hfs->label, hfs->label_len);
> + blkid_set_tag(probe->dev, "LABEL", (char *)hfs->label, hfs->label_len);
> return 0;
> }
>
> @@ -1296,7 +1296,8 @@ static int probe_hfsplus(struct blkid_probe *probe,
> return 0;
>
> label_len = blkid_be16(key->unicode_len) * 2;
> - unicode_16be_to_utf8(label, sizeof(label), key->unicode, label_len);
> + unicode_16be_to_utf8((unsigned char *)label, sizeof(label),
> + key->unicode, label_len);
> blkid_set_tag(probe->dev, "LABEL", label, 0);
> return 0;
> }
> diff --git a/lib/e2p/ls.c b/lib/e2p/ls.c
> index 5e560ed..0f36f40 100644
> --- a/lib/e2p/ls.c
> +++ b/lib/e2p/ls.c
> @@ -383,7 +383,7 @@ void list_super2(struct ext2_super_block * sb, FILE *f)
> tm = sb->s_first_error_time;
> fprintf(f, "First error time: %s", ctime(&tm));
> memset(buf, 0, sizeof(buf));
> - strncpy(buf, sb->s_first_error_func,
> + strncpy(buf, (char *)sb->s_first_error_func,
> sizeof(sb->s_first_error_func));
> fprintf(f, "First error function: %s\n", buf);
> fprintf(f, "First error line #: %u\n",
> @@ -397,7 +397,7 @@ void list_super2(struct ext2_super_block * sb, FILE *f)
> tm = sb->s_last_error_time;
> fprintf(f, "Last error time: %s", ctime(&tm));
> memset(buf, 0, sizeof(buf));
> - strncpy(buf, sb->s_last_error_func,
> + strncpy(buf, (char *)sb->s_last_error_func,
> sizeof(sb->s_last_error_func));
> fprintf(f, "Last error function: %s\n", buf);
> fprintf(f, "Last error line #: %u\n",
> diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h
> index d3eb31d..9acccf2 100644
> --- a/lib/ext2fs/ext2fs.h
> +++ b/lib/ext2fs/ext2fs.h
> @@ -1396,7 +1396,8 @@ _INLINE_ errcode_t ext2fs_get_memalign(unsigned long size,
>
> if (align == 0)
> align = 8;
> - if (retval = posix_memalign((void **) ptr, align, size)) {
> + retval = posix_memalign((void **) ptr, align, size);
> + if (retval) {
> if (retval == ENOMEM)
> return EXT2_ET_NO_MEMORY;
> return retval;
> diff --git a/lib/ext2fs/fileio.c b/lib/ext2fs/fileio.c
> index 4b62c2d..d62ef35 100644
> --- a/lib/ext2fs/fileio.c
> +++ b/lib/ext2fs/fileio.c
> @@ -377,7 +377,7 @@ errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size)
> truncate_block = ((size + file->fs->blocksize - 1) >>
> EXT2_BLOCK_SIZE_BITS(file->fs->super)) + 1;
> old_size = file->inode.i_size +
> - ((blk64_t) file->inode.i_size_high) << 32;
> + ((blk64_t)file->inode.i_size_high << 32);
> old_truncate = ((old_size + file->fs->blocksize - 1) >>
> EXT2_BLOCK_SIZE_BITS(file->fs->super)) + 1;
>
> diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
> index 90abed1..383aa72 100644
> --- a/lib/ext2fs/openfs.c
> +++ b/lib/ext2fs/openfs.c
> @@ -353,7 +353,6 @@ errcode_t ext2fs_open2(const char *name, const char *io_options,
> */
> if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
> EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
> - struct ext2_group_desc *gd;
> dgrp_t group;
>
> for (group = 0; group < fs->group_desc_count; group++) {
> diff --git a/lib/ext2fs/progress.c b/lib/ext2fs/progress.c
> index ec4f553..1b9bf9c 100644
> --- a/lib/ext2fs/progress.c
> +++ b/lib/ext2fs/progress.c
> @@ -77,8 +77,6 @@ void ext2fs_numeric_progress_close(ext2_filsys fs,
> struct ext2fs_numeric_progress_struct * progress,
> const char *message)
> {
> - unsigned int len;
> -
> if (!(fs->flags & EXT2_FLAG_PRINT_PROGRESS))
> return;
> fprintf(stdout, "%.*s", (2*progress->log_max)+1, spaces);
> diff --git a/lib/ext2fs/res_gdt.c b/lib/ext2fs/res_gdt.c
> index bf10995..f3b3969 100644
> --- a/lib/ext2fs/res_gdt.c
> +++ b/lib/ext2fs/res_gdt.c
> @@ -75,7 +75,7 @@ errcode_t ext2fs_create_resize_inode(ext2_filsys fs)
>
> retval = ext2fs_get_array(2, fs->blocksize, &dindir_buf);
> if (retval)
> - goto out_free;
> + return retval;
> gdt_buf = (__u32 *)((char *)dindir_buf + fs->blocksize);
>
> retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
> diff --git a/lib/ext2fs/unix_io.c b/lib/ext2fs/unix_io.c
> index 82e0fe4..6e480b7 100644
> --- a/lib/ext2fs/unix_io.c
> +++ b/lib/ext2fs/unix_io.c
> @@ -17,7 +17,9 @@
>
> #define _LARGEFILE_SOURCE
> #define _LARGEFILE64_SOURCE
> +#ifndef _GNU_SOURCE
> #define _GNU_SOURCE
> +#endif
>
> #include <stdio.h>
> #include <string.h>
> diff --git a/misc/badblocks.c b/misc/badblocks.c
> index 8da66f8..1e7e1c8 100644
> --- a/misc/badblocks.c
> +++ b/misc/badblocks.c
> @@ -29,7 +29,9 @@
> * list. (Work done by David Beattie)
> */
>
> +#ifndef _GNU_SOURCE
> #define _GNU_SOURCE /* for O_DIRECT */
> +#endif
>
> #ifndef O_LARGEFILE
> #define O_LARGEFILE 0
> diff --git a/misc/e2freefrag.c b/misc/e2freefrag.c
> index b827a49..e6fd67e 100644
> --- a/misc/e2freefrag.c
> +++ b/misc/e2freefrag.c
> @@ -144,7 +144,7 @@ errcode_t get_chunk_info(ext2_filsys fs, struct chunk_info *info)
> unsigned long total_chunks;
> char *unitp = "KMGTPEZY";
> int units = 10;
> - unsigned long start = 0, end, cum;
> + unsigned long start = 0, end;
> int i, retval = 0;
>
> scan_block_bitmap(fs, info);
> @@ -218,7 +218,7 @@ void close_device(char *device_name, ext2_filsys fs)
>
> void collect_info(ext2_filsys fs, struct chunk_info *chunk_info)
> {
> - unsigned int retval = 0, i, free_blks;
> + unsigned int retval = 0;
>
> printf("Device: %s\n", fs->device_name);
> printf("Blocksize: %u bytes\n", fs->blocksize);
> diff --git a/misc/e2undo.c b/misc/e2undo.c
> index b85f270..04d0b17 100644
> --- a/misc/e2undo.c
> +++ b/misc/e2undo.c
> @@ -29,12 +29,11 @@ unsigned char blksize_key[] = "filesystem BLKSIZE";
>
> char *prg_name;
>
> -static void usage(char *prg_name)
> +static void usage(void)
> {
> fprintf(stderr,
> _("Usage: %s <transaction file> <filesystem>\n"), prg_name);
> exit(1);
> -
> }
>
> static int check_filesystem(TDB_CONTEXT *tdb, io_channel channel)
> @@ -145,12 +144,12 @@ int main(int argc, char *argv[])
> force = 1;
> break;
> default:
> - usage(prg_name);
> + usage();
> }
> }
>
> - if (argc != optind+2)
> - usage(prg_name);
> + if (argc != optind + 2)
> + usage();
>
> tdb_file = argv[optind];
> device_name = argv[optind+1];
> diff --git a/misc/tune2fs.c b/misc/tune2fs.c
> index bcada11..89bf6c8 100644
> --- a/misc/tune2fs.c
> +++ b/misc/tune2fs.c
> @@ -348,7 +348,6 @@ static void update_feature_set(ext2_filsys fs, char *features)
> {
> struct ext2_super_block *sb = fs->super;
> struct ext2_group_desc *gd;
> - errcode_t retval;
> __u32 old_features[3];
> int i, type_err;
> unsigned int mask_err;
> @@ -992,7 +991,7 @@ static void parse_extended_opts(ext2_filsys fs, const char *opts)
> "Extended mount options too long\n");
> continue;
> }
> - strcpy(fs->super->s_mount_opts, arg);
> + strcpy((char *)fs->super->s_mount_opts, arg);
> ext2fs_mark_super_dirty(fs);
> } else
> r_usage++;
> @@ -1097,7 +1096,7 @@ static int move_block(ext2_filsys fs, ext2fs_block_bitmap bmap)
> {
>
> char *buf;
> - dgrp_t group;
> + dgrp_t group = 0;
> errcode_t retval;
> int meta_data = 0;
> blk64_t blk, new_blk, goal;
> --
> 1.7.3.4
>
> --
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Cheers, Andreas
--
Andreas Dilger
Principal Engineer
Whamcloud, Inc.
--
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