[PATCH] if (foo) kfree(foo) /fs cleanup

Zwane Mwaikambo (zwane@linux.realnet.co.sz)
Sat, 1 Dec 2001 13:36:54 +0200 (SAST)

diff -urN linux-2.5.1-pre4.orig/fs/affs/super.c linux-2.5.1-pre4.kfree/fs/affs/super.c
--- linux-2.5.1-pre4.orig/fs/affs/super.c Tue Nov 13 19:19:41 2001
+++ linux-2.5.1-pre4.kfree/fs/affs/super.c Fri Nov 30 23:42:16 2001
@@ -49,8 +49,8 @@
}

affs_brelse(AFFS_SB->s_bmap_bh);
- if (AFFS_SB->s_prefix)
- kfree(AFFS_SB->s_prefix);
+
+ kfree(AFFS_SB->s_prefix);
kfree(AFFS_SB->s_bitmap);
affs_brelse(AFFS_SB->s_root_bh);

@@ -143,10 +143,11 @@
optn = "prefix";
if (!value || !*value)
goto out_no_arg;
- if (*prefix) { /* Free any previous prefix */
- kfree(*prefix);
- *prefix = NULL;
- }
+
+ /* Free any previous prefix */
+ kfree(*prefix);
+ *prefix = NULL;
+
*prefix = kmalloc(strlen(value) + 1,GFP_KERNEL);
if (!*prefix)
return 0;
@@ -427,11 +428,10 @@
out_error:
if (root_inode)
iput(root_inode);
- if (AFFS_SB->s_bitmap)
- kfree(AFFS_SB->s_bitmap);
+
+ kfree(AFFS_SB->s_bitmap);
affs_brelse(root_bh);
- if (AFFS_SB->s_prefix)
- kfree(AFFS_SB->s_prefix);
+ kfree(AFFS_SB->s_prefix);
return NULL;
}

diff -urN linux-2.5.1-pre4.orig/fs/autofs/waitq.c linux-2.5.1-pre4.kfree/fs/autofs/waitq.c
--- linux-2.5.1-pre4.orig/fs/autofs/waitq.c Fri Feb 9 21:29:44 2001
+++ linux-2.5.1-pre4.kfree/fs/autofs/waitq.c Sat Dec 1 00:21:04 2001
@@ -150,10 +150,8 @@
if ( sbi->catatonic ) {
/* We might have slept, so check again for catatonic mode */
wq->status = -ENOENT;
- if ( wq->name ) {
- kfree(wq->name);
- wq->name = NULL;
- }
+ kfree(wq->name);
+ wq->name = NULL;
}

if ( wq->name ) {
diff -urN linux-2.5.1-pre4.orig/fs/autofs4/inode.c linux-2.5.1-pre4.kfree/fs/autofs4/inode.c
--- linux-2.5.1-pre4.orig/fs/autofs4/inode.c Sat Nov 10 00:11:14 2001
+++ linux-2.5.1-pre4.kfree/fs/autofs4/inode.c Sat Dec 1 00:25:08 2001
@@ -21,10 +21,8 @@

static void ino_lnkfree(struct autofs_info *ino)
{
- if (ino->u.symlink) {
- kfree(ino->u.symlink);
- ino->u.symlink = NULL;
- }
+ kfree(ino->u.symlink);
+ ino->u.symlink = NULL;
}

struct autofs_info *autofs4_init_ino(struct autofs_info *ino,
diff -urN linux-2.5.1-pre4.orig/fs/autofs4/waitq.c linux-2.5.1-pre4.kfree/fs/autofs4/waitq.c
--- linux-2.5.1-pre4.orig/fs/autofs4/waitq.c Fri Feb 9 21:29:44 2001
+++ linux-2.5.1-pre4.kfree/fs/autofs4/waitq.c Sat Dec 1 00:24:35 2001
@@ -187,10 +187,8 @@
if ( sbi->catatonic ) {
/* We might have slept, so check again for catatonic mode */
wq->status = -ENOENT;
- if ( wq->name ) {
- kfree(wq->name);
- wq->name = NULL;
- }
+ kfree(wq->name);
+ wq->name = NULL;
}

if ( wq->name ) {
diff -urN linux-2.5.1-pre4.orig/fs/binfmt_elf.c linux-2.5.1-pre4.kfree/fs/binfmt_elf.c
--- linux-2.5.1-pre4.orig/fs/binfmt_elf.c Sun Oct 21 04:16:59 2001
+++ linux-2.5.1-pre4.kfree/fs/binfmt_elf.c Sat Dec 1 00:24:11 2001
@@ -793,8 +793,7 @@
allow_write_access(interpreter);
fput(interpreter);
out_free_interp:
- if (elf_interpreter)
- kfree(elf_interpreter);
+ kfree(elf_interpreter);
out_free_file:
sys_close(elf_exec_fileno);
out_free_ph:
diff -urN linux-2.5.1-pre4.orig/fs/coda/file.c linux-2.5.1-pre4.kfree/fs/coda/file.c
--- linux-2.5.1-pre4.orig/fs/coda/file.c Sat Sep 22 20:11:09 2001
+++ linux-2.5.1-pre4.kfree/fs/coda/file.c Fri Nov 30 23:44:01 2001
@@ -228,11 +228,9 @@
fput(cfile);
cii->c_container = NULL;

- if (f->private_data) {
- kfree(f->private_data);
- f->private_data = NULL;
- }
-
+ kfree(f->private_data);
+ f->private_data = NULL;
+
unlock_kernel();
return err;
}
diff -urN linux-2.5.1-pre4.orig/fs/coda/inode.c linux-2.5.1-pre4.kfree/fs/coda/inode.c
--- linux-2.5.1-pre4.orig/fs/coda/inode.c Fri Apr 27 23:09:37 2001
+++ linux-2.5.1-pre4.kfree/fs/coda/inode.c Fri Nov 30 23:45:08 2001
@@ -164,11 +164,10 @@

error:
EXIT;
- if (sbi) {
- kfree(sbi);
- if(vc)
- vc->vc_sb = NULL;
- }
+ kfree(sbi);
+ if (vc)
+ vc->vc_sb = NULL;
+
if (root)
iput(root);

diff -urN linux-2.5.1-pre4.orig/fs/devfs/base.c linux-2.5.1-pre4.kfree/fs/devfs/base.c
--- linux-2.5.1-pre4.orig/fs/devfs/base.c Sat Nov 3 20:06:38 2001
+++ linux-2.5.1-pre4.kfree/fs/devfs/base.c Sat Dec 1 09:16:21 2001
@@ -1446,7 +1446,7 @@
{
de->registered = FALSE;
down_write (&symlink_rwsem);
- if (de->u.symlink.linkname) kfree (de->u.symlink.linkname);
+ kfree (de->u.symlink.linkname);
de->u.symlink.linkname = NULL;
up_write (&symlink_rwsem);
return;
@@ -2818,7 +2818,7 @@
if ( S_ISLNK (de->mode) )
{
down_write (&symlink_rwsem);
- if (de->u.symlink.linkname) kfree (de->u.symlink.linkname);
+ kfree (de->u.symlink.linkname);
de->u.symlink.linkname = NULL;
up_write (&symlink_rwsem);
}
diff -urN linux-2.5.1-pre4.orig/fs/fat/inode.c linux-2.5.1-pre4.kfree/fs/fat/inode.c
--- linux-2.5.1-pre4.orig/fs/fat/inode.c Wed Nov 21 00:15:26 2001
+++ linux-2.5.1-pre4.kfree/fs/fat/inode.c Sat Dec 1 09:11:29 2001
@@ -200,10 +200,8 @@
* Note: the iocharset option might have been specified
* without enabling nls_io, so check for it here.
*/
- if (MSDOS_SB(sb)->options.iocharset) {
- kfree(MSDOS_SB(sb)->options.iocharset);
- MSDOS_SB(sb)->options.iocharset = NULL;
- }
+ kfree(MSDOS_SB(sb)->options.iocharset);
+ MSDOS_SB(sb)->options.iocharset = NULL;
}

@@ -338,10 +336,9 @@
if (len) {
char *buffer;

- if (opts->iocharset != NULL) {
- kfree(opts->iocharset);
- opts->iocharset = NULL;
- }
+ kfree(opts->iocharset);
+ opts->iocharset = NULL;
+
buffer = kmalloc(len + 1, GFP_KERNEL);
if (buffer != NULL) {
opts->iocharset = buffer;
@@ -805,12 +802,10 @@
kdevname(sb->s_dev));
}
out_fail:
- if (opts.iocharset) {
- printk("FAT: freeing iocharset=%s\n", opts.iocharset);
- kfree(opts.iocharset);
- }
- if(sbi->private_data)
- kfree(sbi->private_data);
+ printk("FAT: freeing iocharset=%s\n", opts.iocharset);
+ kfree(opts.iocharset);
+
+ kfree(sbi->private_data);
sbi->private_data = NULL;

return NULL;
diff -urN linux-2.5.1-pre4.orig/fs/hpfs/dnode.c linux-2.5.1-pre4.kfree/fs/hpfs/dnode.c
--- linux-2.5.1-pre4.orig/fs/hpfs/dnode.c Tue Sep 5 23:07:29 2000
+++ linux-2.5.1-pre4.kfree/fs/hpfs/dnode.c Fri Nov 30 23:49:33 2001
@@ -236,12 +236,12 @@
go_up:
if (namelen >= 256) {
hpfs_error(i->i_sb, "hpfs_add_to_dnode: namelen == %d", namelen);
- if (nd) kfree(nd);
+ kfree(nd);
kfree(nname);
return 1;
}
if (!(d = hpfs_map_dnode(i->i_sb, dno, &qbh))) {
- if (nd) kfree(nd);
+ kfree(nd);
kfree(nname);
return 1;
}
@@ -249,7 +249,7 @@
if (i->i_sb->s_hpfs_chk)
if (hpfs_stop_cycles(i->i_sb, dno, &c1, &c2, "hpfs_add_to_dnode")) {
hpfs_brelse4(&qbh);
- if (nd) kfree(nd);
+ kfree(nd);
kfree(nname);
return 1;
}
@@ -262,7 +262,7 @@
for_all_poss(i, hpfs_pos_subst, 5, t + 1);
hpfs_mark_4buffers_dirty(&qbh);
hpfs_brelse4(&qbh);
- if (nd) kfree(nd);
+ kfree(nd);
kfree(nname);
return 0;
}
diff -urN linux-2.5.1-pre4.orig/fs/hpfs/super.c linux-2.5.1-pre4.kfree/fs/hpfs/super.c
--- linux-2.5.1-pre4.orig/fs/hpfs/super.c Thu Oct 25 09:02:26 2001
+++ linux-2.5.1-pre4.kfree/fs/hpfs/super.c Fri Nov 30 23:51:55 2001
@@ -74,7 +74,7 @@
} else if (s->s_flags & MS_RDONLY) printk("; going on - but anything won't be destroyed because it's read-only\n");
else printk("; corrupted filesystem mounted read/write - your computer will explode within 20 seconds ... but you wanted it so!\n");
} else printk("\n");
- if (buf) kfree(buf);
+ kfree(buf);
s->s_hpfs_was_error = 1;
}

@@ -100,8 +100,8 @@

void hpfs_put_super(struct super_block *s)
{
- if (s->s_hpfs_cp_table) kfree(s->s_hpfs_cp_table);
- if (s->s_hpfs_bmp_dir) kfree(s->s_hpfs_bmp_dir);
+ kfree(s->s_hpfs_cp_table);
+ kfree(s->s_hpfs_bmp_dir);
unmark_dirty(s);
}

@@ -563,8 +563,8 @@
bail2: brelse(bh0);
bail1:
bail0:
- if (s->s_hpfs_bmp_dir) kfree(s->s_hpfs_bmp_dir);
- if (s->s_hpfs_cp_table) kfree(s->s_hpfs_cp_table);
+ kfree(s->s_hpfs_bmp_dir);
+ kfree(s->s_hpfs_cp_table);
return NULL;
}

Binary files linux-2.5.1-pre4.orig/fs/isofs/.inode.c.swp and linux-2.5.1-pre4.kfree/fs/isofs/.inode.c.swp differ
diff -urN linux-2.5.1-pre4.orig/fs/isofs/inode.c linux-2.5.1-pre4.kfree/fs/isofs/inode.c
--- linux-2.5.1-pre4.orig/fs/isofs/inode.c Thu Oct 25 22:53:53 2001
+++ linux-2.5.1-pre4.kfree/fs/isofs/inode.c Sat Dec 1 12:12:06 2001
@@ -1112,8 +1112,7 @@
goto out_toomany;
} while(more_entries);
out:
- if (tmpde)
- kfree(tmpde);
+ kfree(tmpde);
if (bh)
brelse(bh);
return 0;
@@ -1125,8 +1124,7 @@

out_noread:
printk(KERN_INFO "ISOFS: unable to read i-node block %lu\n", block);
- if (tmpde)
- kfree(tmpde);
+ kfree(tmpde);
return -EIO;

out_toomany:
@@ -1329,8 +1327,7 @@
kdev_t_to_nr(inode->i_rdev));
}
out:
- if (tmpde)
- kfree(tmpde);
+ kfree(tmpde);
if (bh)
brelse(bh);
return;
diff -urN linux-2.5.1-pre4.orig/fs/isofs/rock.c linux-2.5.1-pre4.kfree/fs/isofs/rock.c
--- linux-2.5.1-pre4.orig/fs/isofs/rock.c Thu Oct 25 22:53:53 2001
+++ linux-2.5.1-pre4.kfree/fs/isofs/rock.c Sat Dec 1 00:19:09 2001
@@ -60,7 +60,7 @@
}

#define MAYBE_CONTINUE(LABEL,DEV) \
- {if (buffer) kfree(buffer); \
+ {kfree(buffer); \
if (cont_extent){ \
int block, offset, offset1; \
struct buffer_head * pbh; \
@@ -149,7 +149,7 @@
MAYBE_CONTINUE(repeat, inode);
return retval;
out:
- if(buffer) kfree(buffer);
+ kfree(buffer);
return retval;
}

@@ -213,7 +213,7 @@
retnamlen += rr->len - 5;
break;
case SIG('R','E'):
- if (buffer) kfree(buffer);
+ kfree(buffer);
return -1;
default:
break;
@@ -223,7 +223,7 @@
MAYBE_CONTINUE(repeat,inode);
return retnamlen; /* If 0, this file did not have a NM field */
out:
- if(buffer) kfree(buffer);
+ kfree(buffer);
return 0;
}

@@ -415,7 +415,7 @@
MAYBE_CONTINUE(repeat,inode);
return 0;
out:
- if(buffer) kfree(buffer);
+ kfree(buffer);
return 0;
}

@@ -571,8 +571,7 @@

/* error exit from macro */
out:
- if (buffer)
- kfree(buffer);
+ kfree(buffer);
goto fail;
out_noread:
printk("unable to read i-node block");
diff -urN linux-2.5.1-pre4.orig/fs/jbd/commit.c linux-2.5.1-pre4.kfree/fs/jbd/commit.c
--- linux-2.5.1-pre4.orig/fs/jbd/commit.c Sat Nov 10 00:25:04 2001
+++ linux-2.5.1-pre4.kfree/fs/jbd/commit.c Fri Nov 30 23:08:58 2001
@@ -619,17 +619,15 @@
*
* Otherwise, we can just throw away the frozen data now.
*/
- if (jh->b_committed_data) {
- kfree(jh->b_committed_data);
- jh->b_committed_data = NULL;
- if (jh->b_frozen_data) {
- jh->b_committed_data = jh->b_frozen_data;
- jh->b_frozen_data = NULL;
- }
- } else if (jh->b_frozen_data) {
+ kfree(jh->b_committed_data);
+ jh->b_committed_data = NULL;
+
+ if (jh->b_frozen_data)
+ jh->b_committed_data = jh->b_frozen_data;
+ else
kfree(jh->b_frozen_data);
- jh->b_frozen_data = NULL;
- }
+
+ jh->b_frozen_data = NULL;

spin_lock(&journal_datalist_lock);
cp_transaction = jh->b_cp_transaction;
diff -urN linux-2.5.1-pre4.orig/fs/jbd/transaction.c linux-2.5.1-pre4.kfree/fs/jbd/transaction.c
--- linux-2.5.1-pre4.orig/fs/jbd/transaction.c Sat Nov 10 00:25:04 2001
+++ linux-2.5.1-pre4.kfree/fs/jbd/transaction.c Fri Nov 30 23:29:20 2001
@@ -739,8 +739,7 @@
journal_cancel_revoke(handle, jh);

out_unlocked:
- if (frozen_buffer)
- kfree(frozen_buffer);
+ kfree(frozen_buffer);

JBUFFER_TRACE(jh, "exit");
return error;
diff -urN linux-2.5.1-pre4.orig/fs/jffs/intrep.c linux-2.5.1-pre4.kfree/fs/jffs/intrep.c
--- linux-2.5.1-pre4.orig/fs/jffs/intrep.c Fri Oct 5 00:13:18 2001
+++ linux-2.5.1-pre4.kfree/fs/jffs/intrep.c Fri Nov 30 23:54:38 2001
@@ -1670,8 +1670,7 @@
}
printk("jffs_find_child(): Didn't find the file \"%s\".\n",
(copy ? copy : ""));
- if (copy) {
- kfree(copy);
+ kfree(copy);
}
});

diff -urN linux-2.5.1-pre4.orig/fs/jffs2/file.c linux-2.5.1-pre4.kfree/fs/jffs2/file.c
--- linux-2.5.1-pre4.orig/fs/jffs2/file.c Fri Oct 5 00:13:18 2001
+++ linux-2.5.1-pre4.kfree/fs/jffs2/file.c Sat Dec 1 00:16:42 2001
@@ -449,8 +449,7 @@
}
if (comprtype == JFFS2_COMPR_NONE) {
/* Either compression failed, or the allocation of comprbuf failed */
- if (comprbuf)
- kfree(comprbuf);
+ kfree(comprbuf);
comprbuf = page_address(pg) + (file_ofs & (PAGE_CACHE_SIZE -1));
datalen = cdatalen;
}
diff -urN linux-2.5.1-pre4.orig/fs/jffs2/gc.c linux-2.5.1-pre4.kfree/fs/jffs2/gc.c
--- linux-2.5.1-pre4.orig/fs/jffs2/gc.c Fri Oct 5 00:13:18 2001
+++ linux-2.5.1-pre4.kfree/fs/jffs2/gc.c Sat Dec 1 00:15:43 2001
@@ -649,7 +649,7 @@
f->metadata = NULL;
}
}
- if (comprbuf) kfree(comprbuf);
+ kfree(comprbuf);

kunmap(pg);
/* XXX: Does the page get freed automatically? */
diff -urN linux-2.5.1-pre4.orig/fs/namespace.c linux-2.5.1-pre4.kfree/fs/namespace.c
--- linux-2.5.1-pre4.orig/fs/namespace.c Sun Nov 11 21:23:14 2001
+++ linux-2.5.1-pre4.kfree/fs/namespace.c Sat Dec 1 00:22:41 2001
@@ -1082,8 +1082,7 @@
spin_lock(&dcache_lock);
attach_mnt(old_rootmnt, &nd);
if (new_devname) {
- if (old_rootmnt->mnt_devname)
- kfree(old_rootmnt->mnt_devname);
+ kfree(old_rootmnt->mnt_devname);
old_rootmnt->mnt_devname = new_devname;
}
spin_unlock(&dcache_lock);
diff -urN linux-2.5.1-pre4.orig/fs/nfs/flushd.c linux-2.5.1-pre4.kfree/fs/nfs/flushd.c
--- linux-2.5.1-pre4.orig/fs/nfs/flushd.c Sat Nov 10 00:28:15 2001
+++ linux-2.5.1-pre4.kfree/fs/nfs/flushd.c Fri Nov 30 23:37:51 2001
@@ -141,10 +141,8 @@

void nfs_reqlist_free(struct nfs_server *server)
{
- if (server->rw_requests) {
- kfree(server->rw_requests);
- server->rw_requests = NULL;
- }
+ kfree(server->rw_requests);
+ server->rw_requests = NULL;
}

#define NFS_FLUSHD_TIMEOUT (30*HZ)
diff -urN linux-2.5.1-pre4.orig/fs/nfs/unlink.c linux-2.5.1-pre4.kfree/fs/nfs/unlink.c
--- linux-2.5.1-pre4.orig/fs/nfs/unlink.c Thu Aug 16 18:39:37 2001
+++ linux-2.5.1-pre4.kfree/fs/nfs/unlink.c Fri Nov 30 23:28:26 2001
@@ -52,8 +52,7 @@
{
if (--data->count == 0) {
nfs_detach_unlinkdata(data);
- if (data->name.name != NULL)
- kfree(data->name.name);
+ kfree(data->name.name);
kfree(data);
}
}
diff -urN linux-2.5.1-pre4.orig/fs/nfsd/nfsctl.c linux-2.5.1-pre4.kfree/fs/nfsd/nfsctl.c
--- linux-2.5.1-pre4.orig/fs/nfsd/nfsctl.c Sun Oct 21 19:32:33 2001
+++ linux-2.5.1-pre4.kfree/fs/nfsd/nfsctl.c Fri Nov 30 23:57:09 2001
@@ -295,10 +295,8 @@
copy_to_user(resp, res, respsize);

done:
- if (arg)
- kfree(arg);
- if (res)
- kfree(res);
+ kfree(arg);
+ kfree(res);

unlock_kernel ();
MOD_DEC_USE_COUNT;
diff -urN linux-2.5.1-pre4.orig/fs/openpromfs/inode.c linux-2.5.1-pre4.kfree/fs/openpromfs/inode.c
--- linux-2.5.1-pre4.orig/fs/openpromfs/inode.c Sun Nov 11 20:13:25 2001
+++ linux-2.5.1-pre4.kfree/fs/openpromfs/inode.c Sat Dec 1 09:17:50 2001
@@ -1044,8 +1044,7 @@
unregister_filesystem(&openprom_fs_type);
free_pages ((unsigned long)nodes, alloced);
for (i = 0; i < aliases_nodes; i++)
- if (alias_names [i])
- kfree (alias_names [i]);
+ kfree (alias_names [i]);
nodes = NULL;
}

diff -urN linux-2.5.1-pre4.orig/fs/ufs/super.c linux-2.5.1-pre4.kfree/fs/ufs/super.c
--- linux-2.5.1-pre4.orig/fs/ufs/super.c Tue Nov 20 00:55:46 2001
+++ linux-2.5.1-pre4.kfree/fs/ufs/super.c Sat Dec 1 09:13:00 2001
@@ -381,13 +381,13 @@
return 1;

failed:
- if (base) kfree (base);
+ kfree (base);
if (sb->u.ufs_sb.s_ucg) {
for (i = 0; i < uspi->s_ncg; i++)
if (sb->u.ufs_sb.s_ucg[i]) brelse (sb->u.ufs_sb.s_ucg[i]);
kfree (sb->u.ufs_sb.s_ucg);
for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
- if (sb->u.ufs_sb.s_ucpi[i]) kfree (sb->u.ufs_sb.s_ucpi[i]);
+ kfree (sb->u.ufs_sb.s_ucpi[i]);
}
UFSD(("EXIT (FAILED)\n"))
return 0;
@@ -804,7 +804,7 @@

failed:
if (ubh) ubh_brelse_uspi (uspi);
- if (uspi) kfree (uspi);
+ kfree (uspi);
UFSD(("EXIT (FAILED)\n"))
return(NULL);
}

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