[PATCH 3/3] jfs: Adjust 67 checks for null pointers

From: SF Markus Elfring
Date: Fri Aug 18 2017 - 09:38:13 EST

From: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
Date: Fri, 18 Aug 2017 15:15:02 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

The script âcheckpatch.plâ pointed information out like the following.

Comparison to NULL could be written !â

Thus fix the affected source code places.

Signed-off-by: Markus Elfring <elfring@xxxxxxxxxxxxxxxxxxxxx>
---
fs/jfs/jfs_dmap.c | 44 ++++++++++++++++++++++----------------------
fs/jfs/jfs_dtree.c | 6 +++---
fs/jfs/jfs_imap.c | 25 ++++++++++++-------------
fs/jfs/jfs_logmgr.c | 18 +++++++++---------
fs/jfs/jfs_metapage.c | 5 ++---
fs/jfs/jfs_mount.c | 6 +++---
fs/jfs/jfs_txnmgr.c | 6 +++---
fs/jfs/jfs_unicode.c | 3 +--
fs/jfs/jfs_xtree.c | 6 +++---
fs/jfs/namei.c | 3 +--
fs/jfs/resize.c | 2 +-
fs/jfs/super.c | 4 ++--
fs/jfs/xattr.c | 10 +++++-----
13 files changed, 67 insertions(+), 71 deletions(-)

diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 2d514c7affc2..59a8f86984c2 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -174,14 +174,14 @@ int dbMount(struct inode *ipbmap)
*/
/* allocate memory for the in-memory bmap descriptor */
bmp = kmalloc(sizeof(struct bmap), GFP_KERNEL);
- if (bmp == NULL)
+ if (!bmp)
return -ENOMEM;

/* read the on-disk bmap descriptor. */
mp = read_metapage(ipbmap,
BMAPBLKNO << JFS_SBI(ipbmap->i_sb)->l2nbperpage,
PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
kfree(bmp);
return -EIO;
}
@@ -274,7 +274,7 @@ int dbSync(struct inode *ipbmap)
mp = read_metapage(ipbmap,
BMAPBLKNO << JFS_SBI(ipbmap->i_sb)->l2nbperpage,
PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
jfs_err("dbSync: read_metapage failed!");
return -EIO;
}
@@ -370,7 +370,7 @@ int dbFree(struct inode *ip, s64 blkno, s64 nblocks)
/* get the buffer for the current dmap. */
lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
IREAD_UNLOCK(ipbmap);
return -EIO;
}
@@ -464,7 +464,7 @@ dbUpdatePMap(struct inode *ipbmap,

mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE,
0);
- if (mp == NULL)
+ if (!mp)
return -EIO;
metapage_wait_for_io(mp);
}
@@ -780,7 +780,7 @@ int dbAlloc(struct inode *ip, s64 hint, s64 nblocks, s64 * results)
rc = -EIO;
lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
goto read_unlock;

dp = (struct dmap *) mp->data;
@@ -922,7 +922,7 @@ int dbAllocExact(struct inode *ip, s64 blkno, int nblocks)
/* read in the dmap covering the extent */
lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
IREAD_UNLOCK(ipbmap);
return -EIO;
}
@@ -1078,7 +1078,7 @@ static int dbExtend(struct inode *ip, s64 blkno, s64 nblocks, s64 addnblocks)
*/
lblkno = BLKTODMAP(extblkno, bmp->db_l2nbperpage);
mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
IREAD_UNLOCK(ipbmap);
return -EIO;
}
@@ -1421,7 +1421,7 @@ dbAllocAG(struct bmap * bmp, int agno, s64 nblocks, int l2nb, s64 * results)
*/
lblkno = BLKTOCTL(blkno, bmp->db_l2nbperpage, bmp->db_aglevel);
mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
return -EIO;
dcp = (struct dmapctl *) mp->data;
budmin = dcp->budmin;
@@ -1642,7 +1642,7 @@ s64 dbDiscardAG(struct inode *ip, int agno, s64 minlen)
do_div(max_ranges, minlen);
range_cnt = min_t(u64, max_ranges + 1, 32 * 1024);
totrim = kmalloc(sizeof(struct range2trim) * range_cnt, GFP_NOFS);
- if (totrim == NULL) {
+ if (!totrim) {
jfs_error(bmp->db_ipbmap->i_sb, "no memory for trim array\n");
IWRITE_UNLOCK(ipbmap);
return 0;
@@ -1743,7 +1743,7 @@ static int dbFindCtl(struct bmap * bmp, int l2nb, int level, s64 * blkno)
*/
lblkno = BLKTOCTL(b, bmp->db_l2nbperpage, lev);
mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
return -EIO;
dcp = (struct dmapctl *) mp->data;
budmin = dcp->budmin;
@@ -1857,7 +1857,7 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results)
*/
lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
return -EIO;
dp = (struct dmap *) mp->data;

@@ -1884,7 +1884,7 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results)
*/
lblkno = BLKTODMAP(b, bmp->db_l2nbperpage);
mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
rc = -EIO;
goto backout;
}
@@ -1937,7 +1937,7 @@ dbAllocCtl(struct bmap * bmp, s64 nblocks, int l2nb, s64 blkno, s64 * results)
*/
lblkno = BLKTODMAP(b, bmp->db_l2nbperpage);
mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
/* could not back out. mark the file system
* to indicate that we have leaked blocks.
*/
@@ -2519,7 +2519,7 @@ dbAdjCtl(struct bmap * bmp, s64 blkno, int newval, int alloc, int level)
*/
lblkno = BLKTOCTL(blkno, bmp->db_l2nbperpage, level);
mp = read_metapage(bmp->db_ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
return -EIO;
dcp = (struct dmapctl *) mp->data;

@@ -3232,7 +3232,7 @@ int dbAllocBottomUp(struct inode *ip, s64 blkno, s64 nblocks)
/* get the buffer for the current dmap. */
lblkno = BLKTODMAP(blkno, bmp->db_l2nbperpage);
mp = read_metapage(ipbmap, lblkno, PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
IREAD_UNLOCK(ipbmap);
return -EIO;
}
@@ -3485,7 +3485,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
if (j0) {
/* read in L1 page: (blkno & (MAXL1SIZE - 1)) */
l1mp = read_metapage(ipbmap, p, PSIZE, 0);
- if (l1mp == NULL)
+ if (!l1mp)
goto errout;
l1dcp = (struct dmapctl *) l1mp->data;

@@ -3497,7 +3497,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
} else {
/* assign/init L1 page */
l1mp = get_metapage(ipbmap, p, PSIZE, 0);
- if (l1mp == NULL)
+ if (!l1mp)
goto errout;

l1dcp = (struct dmapctl *) l1mp->data;
@@ -3517,7 +3517,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
/* read in L0 page: (blkno & (MAXL0SIZE - 1)) */

l0mp = read_metapage(ipbmap, p, PSIZE, 0);
- if (l0mp == NULL)
+ if (!l0mp)
goto errout;
l0dcp = (struct dmapctl *) l0mp->data;

@@ -3531,7 +3531,7 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
} else {
/* assign/init L0 page */
l0mp = get_metapage(ipbmap, p, PSIZE, 0);
- if (l0mp == NULL)
+ if (!l0mp)
goto errout;

l0dcp = (struct dmapctl *) l0mp->data;
@@ -3554,14 +3554,14 @@ int dbExtendFS(struct inode *ipbmap, s64 blkno, s64 nblocks)
/* read in dmap page: */
mp = read_metapage(ipbmap, p,
PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
goto errout;
n = min(nblocks, (s64)BPERDMAP - n);
} else {
/* assign/init dmap page */
mp = read_metapage(ipbmap, p,
PSIZE, 0);
- if (mp == NULL)
+ if (!mp)
goto errout;

n = min_t(s64, nblocks, BPERDMAP);
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index de2bcb36e079..b3202b5b0acd 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -1365,7 +1365,7 @@ static int dtSplitPage(tid_t tid, struct inode *ip, struct dtsplit * split,
pxdlist->npxd++;
rbn = addressPXD(pxd);
rmp = get_metapage(ip, rbn, PSIZE, 1);
- if (rmp == NULL)
+ if (!rmp)
return -EIO;

/* Allocate blocks to quota. */
@@ -3781,12 +3781,12 @@ static int ciGetLeafPrefixKey(dtpage_t * lp, int li, dtpage_t * rp,

lkey.name = kmalloc((JFS_NAME_MAX + 1) * sizeof(wchar_t),
GFP_KERNEL);
- if (lkey.name == NULL)
+ if (!lkey.name)
return -ENOMEM;

rkey.name = kmalloc((JFS_NAME_MAX + 1) * sizeof(wchar_t),
GFP_KERNEL);
- if (rkey.name == NULL) {
+ if (!rkey.name) {
kfree(lkey.name);
return -ENOMEM;
}
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index a7e3a61187db..0dcbdf556a1a 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -124,7 +124,7 @@ int diMount(struct inode *ipimap)
mp = read_metapage(ipimap,
IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage,
PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
kfree(imap);
return -EIO;
}
@@ -228,7 +228,7 @@ int diSync(struct inode *ipimap)
mp = get_metapage(ipimap,
IMAPBLKNO << JFS_SBI(ipimap->i_sb)->l2nbperpage,
PSIZE, 0);
- if (mp == NULL) {
+ if (!mp) {
jfs_err("diSync: get_metapage failed!");
return -EIO;
}
@@ -433,7 +433,7 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)
struct metapage *mp;

ip = new_inode(sb);
- if (ip == NULL) {
+ if (!ip) {
jfs_err("diReadSpecial: new_inode returned NULL!");
return ip;
}
@@ -454,7 +454,7 @@ struct inode *diReadSpecial(struct super_block *sb, ino_t inum, int secondary)

/* read the page of fixed disk inode (AIT) in raw mode */
mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1);
- if (mp == NULL) {
+ if (!mp) {
set_nlink(ip, 1); /* Don't want iput() deleting it */
iput(ip);
return (NULL);
@@ -531,7 +531,7 @@ void diWriteSpecial(struct inode *ip, int secondary)

/* read the page of fixed disk inode (AIT) in raw mode */
mp = read_metapage(ip, address << sbi->l2nbperpage, PSIZE, 1);
- if (mp == NULL) {
+ if (!mp) {
jfs_err("diWriteSpecial: failed to read aggregate inode extent!");
return;
}
@@ -558,7 +558,7 @@ void diWriteSpecial(struct inode *ip, int secondary)
*/
void diFreeSpecial(struct inode *ip)
{
- if (ip == NULL) {
+ if (!ip) {
jfs_err("diFreeSpecial called with NULL ip!");
return;
}
@@ -1109,7 +1109,7 @@ int diFree(struct inode *ip)
goto error_out;
ciagp = (struct iag *) cmp->data;
}
- assert(ciagp != NULL);
+ assert(ciagp);
}

if (inofreeback >= 0) {
@@ -1123,7 +1123,7 @@ int diFree(struct inode *ip)
goto error_out;
diagp = (struct iag *) dmp->data;
}
- assert(diagp != NULL);
+ assert(diagp);
}
}

@@ -2250,7 +2250,7 @@ static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
goto error_out;
ciagp = (struct iag *) cmp->data;
}
- if (ciagp == NULL) {
+ if (!ciagp) {
jfs_error(imap->im_ipimap->i_sb,
"ciagp == NULL\n");
rc = -EIO;
@@ -2282,7 +2282,7 @@ static int diNewExt(struct inomap * imap, struct iag * iagp, int extno)
/* get a buffer for this page of disk inodes.
*/
dmp = get_metapage(ipimap, blkno + i, PSIZE, 1);
- if (dmp == NULL) {
+ if (!dmp) {
rc = -EIO;
goto error_out;
}
@@ -2679,9 +2679,8 @@ static int diIAGRead(struct inomap * imap, int iagno, struct metapage ** mpp)

/* read the iag. */
*mpp = read_metapage(ipimap, blkno, PSIZE, 0);
- if (*mpp == NULL) {
+ if (!*mpp)
return -EIO;
- }

return (0);
}
@@ -3000,7 +2999,7 @@ static void duplicateIXtree(struct super_block *sb, s64 blkno,
if (JFS_SBI(sb)->mntflag & JFS_BAD_SAIT) /* s_flag */
return;
ip = diReadSpecial(sb, FILESYSTEM_I, 1);
- if (ip == NULL) {
+ if (!ip) {
JFS_SBI(sb)->mntflag |= JFS_BAD_SAIT;
if (readSuper(sb, &bh))
return;
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index ed103c44bd52..a4ba7cbbde2a 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -249,11 +249,11 @@ int lmLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
LOG_LOCK(log);

/* log by (out-of-transaction) JFS ? */
- if (tblk == NULL)
+ if (!tblk)
goto writeRecord;

/* log from page ? */
- if (tlck == NULL ||
+ if (!tlck ||
tlck->type & tlckBTROOT || (mp = tlck->mp) == NULL)
goto writeRecord;

@@ -382,7 +382,7 @@ lmWriteRecord(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
dstoffset = log->eor;

/* any log data to write ? */
- if (tlck == NULL)
+ if (!tlck)
goto moveLrd;

/*
@@ -617,7 +617,7 @@ static int lmNextPage(struct jfs_log * log)
* of the pages since log pages will be added
* continuously
*/
- if (bp->l_wqnext == NULL)
+ if (!bp->l_wqnext)
lbmWrite(log, bp, 0, 0);
} else {
/*
@@ -902,7 +902,7 @@ static void lmPostGC(struct lbuf * bp)
* wake her up to lead her group.
*/
if ((!list_empty(&log->cqueue)) &&
- ((log->gcrtc > 0) || (tblk->bp->l_wqnext != NULL) ||
+ ((log->gcrtc > 0) || tblk->bp->l_wqnext ||
test_bit(log_FLUSH, &log->flag) || jfs_tlocks_low))
/*
* Call lmGCwrite with new group leader
@@ -1842,7 +1842,7 @@ static int lbmLogInit(struct jfs_log * log)
buffer = page_address(page);
for (offset = 0; offset < PAGE_SIZE; offset += LOGPSIZE) {
lbuf = kmalloc(sizeof(*lbuf), GFP_KERNEL);
- if (lbuf == NULL) {
+ if (!lbuf) {
if (offset == 0)
__free_page(page);
goto error;
@@ -1941,7 +1941,7 @@ static void lbmfree(struct lbuf * bp)
{
struct jfs_log *log = bp->l_log;

- assert(bp->l_wqnext == NULL);
+ assert(!bp->l_wqnext);

/*
* return the buffer to head of freelist
@@ -2062,9 +2062,9 @@ static void lbmWrite(struct jfs_log * log, struct lbuf * bp, int flag,
tail = log->wqueue;

/* is buffer not already on write queue ? */
- if (bp->l_wqnext == NULL) {
+ if (!bp->l_wqnext) {
/* insert at tail of wqueue */
- if (tail == NULL) {
+ if (!tail) {
log->wqueue = bp;
bp->l_wqnext = bp;
} else {
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 6c75a7c87c0c..bc28c90cd145 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -210,13 +210,12 @@ int __init metapage_init(void)
*/
metapage_cache = kmem_cache_create("jfs_mp", sizeof(struct metapage),
0, 0, NULL);
- if (metapage_cache == NULL)
+ if (!metapage_cache)
return -ENOMEM;

metapage_mempool = mempool_create_slab_pool(METAPOOL_MIN_PAGES,
metapage_cache);
-
- if (metapage_mempool == NULL) {
+ if (!metapage_mempool) {
kmem_cache_destroy(metapage_cache);
return -ENOMEM;
}
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index 9895595fd2f2..55b8862f9978 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -96,7 +96,7 @@ int jfs_mount(struct super_block *sb)
}

ipaimap = diReadSpecial(sb, AGGREGATE_I, 0);
- if (ipaimap == NULL) {
+ if (!ipaimap) {
jfs_err("jfs_mount: Failed to read AGGREGATE_I");
rc = -EIO;
goto errout20;
@@ -117,7 +117,7 @@ int jfs_mount(struct super_block *sb)
* open aggregate block allocation map
*/
ipbmap = diReadSpecial(sb, BMAP_I, 0);
- if (ipbmap == NULL) {
+ if (!ipbmap) {
rc = -EIO;
goto errout22;
}
@@ -175,7 +175,7 @@ int jfs_mount(struct super_block *sb)
* open fileset inode allocation map (aka fileset inode)
*/
ipimap = diReadSpecial(sb, FILESYSTEM_I, 0);
- if (ipimap == NULL) {
+ if (!ipimap) {
jfs_err("jfs_mount: Failed to read FILESYSTEM_I");
/* open fileset secondary inode allocation map */
rc = -EIO;
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index 4d973524c887..13a83e1c0989 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -282,7 +282,7 @@ int txInit(void)

size = sizeof(struct tblock) * nTxBlock;
TxBlock = vmalloc(size);
- if (TxBlock == NULL)
+ if (!TxBlock)
return -ENOMEM;

for (k = 1; k < nTxBlock - 1; k++) {
@@ -307,7 +307,7 @@ int txInit(void)
*/
size = sizeof(struct tlock) * nTxLock;
TxLock = vmalloc(size);
- if (TxLock == NULL) {
+ if (!TxLock) {
vfree(TxBlock);
return -ENOMEM;
}
@@ -2201,7 +2201,7 @@ void txEA(tid_t tid, struct inode *ip, dxd_t * oldea, dxd_t * newea)
* format maplock for free of old EA extent
*/
if (!test_cflag(COMMIT_Nolink, ip) && oldea->flag & DXD_EXTENT) {
- if (tlck == NULL) {
+ if (!tlck) {
tlck = txMaplock(tid, ip, tlckMAP);
maplock = (struct pxd_lock *) & tlck->lock;
pxdlock = (struct pxd_lock *) maplock;
diff --git a/fs/jfs/jfs_unicode.c b/fs/jfs/jfs_unicode.c
index c7de6f5bbefc..f8a6ad65f42a 100644
--- a/fs/jfs/jfs_unicode.c
+++ b/fs/jfs/jfs_unicode.c
@@ -122,8 +122,7 @@ int get_UCSname(struct component_name * uniName, struct dentry *dentry)

uniName->name =
kmalloc((length + 1) * sizeof(wchar_t), GFP_NOFS);
-
- if (uniName->name == NULL)
+ if (!uniName->name)
return -ENOMEM;

uniName->namlen = jfs_strtoUCS(uniName->name, dentry->d_name.name,
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index 5cde6d2fcfca..b5625ef8afb7 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -759,7 +759,7 @@ xtSplitUp(tid_t tid,
*
* allocation hint: ?
*/
- if (split->pxdlist == NULL) {
+ if (!split->pxdlist) {
nsplit = btstack->nsplit;
split->pxdlist = &pxdlist;
pxdlist.maxnpxd = pxdlist.npxd = 0;
@@ -996,7 +996,7 @@ xtSplitPage(tid_t tid, struct inode *ip,
* allocate the new right page for the split
*/
rmp = get_metapage(ip, rbn, PSIZE, 1);
- if (rmp == NULL) {
+ if (!rmp) {
rc = -EIO;
goto clean_up;
}
@@ -1249,7 +1249,7 @@ xtSplitRoot(tid_t tid,
pxdlist->npxd++;
rbn = addressPXD(pxd);
rmp = get_metapage(ip, rbn, PSIZE, 1);
- if (rmp == NULL)
+ if (!rmp)
return -EIO;

/* Allocate blocks to quota. */
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index b41596d71858..587f2f83a725 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1006,8 +1006,7 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry,
int copy_size = min(ssize, PSIZE);

mp = get_metapage(ip, xaddr, PSIZE, 1);
-
- if (mp == NULL) {
+ if (!mp) {
xtTruncate(tid, ip, 0, COMMIT_PWMAP);
rc = -EIO;
txAbort(tid, 0);
diff --git a/fs/jfs/resize.c b/fs/jfs/resize.c
index 7ddcb445a3d9..3855ebf4b076 100644
--- a/fs/jfs/resize.c
+++ b/fs/jfs/resize.c
@@ -478,7 +478,7 @@ int jfs_extendfs(struct super_block *sb, s64 newLVSize, int newLogSize)
*/

ipbmap2 = diReadSpecial(sb, BMAP_I, 1);
- if (ipbmap2 == NULL) {
+ if (!ipbmap2) {
printk(KERN_ERR "jfs_extendfs: diReadSpecial(bmap) failed\n");
goto error_out;
}
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 381476422e8d..2154878ba7e4 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -574,7 +574,7 @@ static int jfs_fill_super(struct super_block *sb, void *data, int silent)
* Initialize direct-mapping inode/address-space
*/
inode = new_inode(sb);
- if (inode == NULL) {
+ if (!inode) {
ret = -ENOMEM;
goto out_unload;
}
@@ -975,7 +975,7 @@ static int __init init_jfs_fs(void)
kmem_cache_create("jfs_ip", sizeof(struct jfs_inode_info), 0,
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD|SLAB_ACCOUNT,
init_once);
- if (jfs_inode_cachep == NULL)
+ if (!jfs_inode_cachep)
return -ENOMEM;

/*
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index c60f3d32ee91..c0cbec5e477f 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -494,7 +494,7 @@ static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
* contiguous buffer to work with
*/
ea_buf->xattr = kmalloc(size, GFP_KERNEL);
- if (ea_buf->xattr == NULL)
+ if (!ea_buf->xattr)
return -ENOMEM;

ea_buf->flag = EA_MALLOC;
@@ -537,7 +537,7 @@ static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
ea_buf->mp = get_metapage(inode, blkno,
blocks_needed << sb->s_blocksize_bits,
1);
- if (ea_buf->mp == NULL) {
+ if (!ea_buf->mp) {
dbFree(inode, blkno, (s64) blocks_needed);
rc = -EIO;
goto clean_up;
@@ -558,7 +558,7 @@ static int ea_get(struct inode *inode, struct ea_buffer *ea_buf, int min_size)
ea_buf->mp = read_metapage(inode, addressDXD(&ji->ea),
lengthDXD(&ji->ea) << sb->s_blocksize_bits,
1);
- if (ea_buf->mp == NULL) {
+ if (!ea_buf->mp) {
rc = -EIO;
goto clean_up;
}
@@ -712,7 +712,7 @@ int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
rc = -ENODATA;
goto release;
}
- if (value == NULL) {
+ if (!value) {
rc = 0;
goto release;
}
@@ -1016,7 +1016,7 @@ static int jfs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
char *name;
int err = 0;

- for (xattr = xattr_array; xattr->name != NULL; xattr++) {
+ for (xattr = xattr_array; xattr->name; xattr++) {
name = kmalloc(XATTR_SECURITY_PREFIX_LEN +
strlen(xattr->name) + 1, GFP_NOFS);
if (!name) {
--
2.14.0