[PATCH 0/6] staging: exfat: fix multiple coding-style issues

[PATCH 0/6] staging: exfat: fix multiple coding-style issues

[Roi Martin]

Fix multiple coding-style issues reported by the checkpatch.pl script in
the exfat module.

Roi Martin (6):
  staging: exfat: remove unnecessary parentheses
  staging: exfat: make alignment match open parenthesis
  staging: exfat: remove unnecessary new line in if condition
  staging: exfat: replace printk(KERN_INFO ...) with pr_info()
  staging: exfat: avoid multiple assignments
  staging: exfat: replace kmalloc with kmalloc_array

 drivers/staging/exfat/exfat_core.c  |  50 +++++-----
 drivers/staging/exfat/exfat_super.c | 136 +++++++++++++++++++---------
 2 files changed, 119 insertions(+), 67 deletions(-)

-- 
2.20.1

[PATCH 1/6] staging: exfat: remove unnecessary parentheses

[Roi Martin]

Fix checkpatch.pl warning:

	CHECK: Unnecessary parentheses around ...

Signed-off-by: Roi Martin <jroi.martin@gmail.com>
---
 drivers/staging/exfat/exfat_core.c  | 24 ++++++++--------
 drivers/staging/exfat/exfat_super.c | 44 ++++++++++++++---------------
 2 files changed, 34 insertions(+), 34 deletions(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index 79174e5c4145..d8f4fad732c4 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -550,7 +550,7 @@ s32 load_alloc_bitmap(struct super_block *sb)
 
 				for (j = 0; j < p_fs->map_sectors; j++) {
 					p_fs->vol_amap[j] = NULL;
-					ret = sector_read(sb, sector + j, &(p_fs->vol_amap[j]), 1);
+					ret = sector_read(sb, sector + j, &p_fs->vol_amap[j], 1);
 					if (ret != FFS_SUCCESS) {
 						/*  release all buffers and free vol_amap */
 						i = 0;
@@ -910,10 +910,10 @@ u32 fat_get_entry_type(struct dentry_t *p_entry)
 {
 	struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
 
-	if (*(ep->name) == 0x0)
+	if (*ep->name == 0x0)
 		return TYPE_UNUSED;
 
-	else if (*(ep->name) == 0xE5)
+	else if (*ep->name == 0xE5)
 		return TYPE_DELETED;
 
 	else if (ep->attr == ATTR_EXTEND)
@@ -978,10 +978,10 @@ void fat_set_entry_type(struct dentry_t *p_entry, u32 type)
 	struct dos_dentry_t *ep = (struct dos_dentry_t *)p_entry;
 
 	if (type == TYPE_UNUSED)
-		*(ep->name) = 0x0;
+		*ep->name = 0x0;
 
 	else if (type == TYPE_DELETED)
-		*(ep->name) = 0xE5;
+		*ep->name = 0xE5;
 
 	else if (type == TYPE_EXTEND)
 		ep->attr = ATTR_EXTEND;
@@ -1562,7 +1562,7 @@ void update_dir_checksum_with_entry_set(struct super_block *sb,
 	u16 chksum = 0;
 	s32 chksum_type = CS_DIR_ENTRY, i;
 
-	ep = (struct dentry_t *)&(es->__buf);
+	ep = (struct dentry_t *)&es->__buf;
 	for (i = 0; i < es->num_entries; i++) {
 		pr_debug("%s ep %p\n", __func__, ep);
 		chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum,
@@ -1571,7 +1571,7 @@ void update_dir_checksum_with_entry_set(struct super_block *sb,
 		chksum_type = CS_DEFAULT;
 	}
 
-	ep = (struct dentry_t *)&(es->__buf);
+	ep = (struct dentry_t *)&es->__buf;
 	SET16_A(((struct file_dentry_t *)ep)->checksum, chksum);
 	write_whole_entry_set(sb, es);
 }
@@ -1832,7 +1832,7 @@ struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
 	}
 
 	if (file_ep)
-		*file_ep = (struct dentry_t *)&(es->__buf);
+		*file_ep = (struct dentry_t *)&es->__buf;
 
 	pr_debug("%s exiting es %p sec %llu offset %d flags %d, num_entries %u buf ptr %p\n",
 		   __func__, es, (unsigned long long)es->sector, es->offset,
@@ -1859,7 +1859,7 @@ static s32 __write_partial_entries_in_entry_set(struct super_block *sb,
 	struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
 	struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
 	u32 clu;
-	u8 *buf, *esbuf = (u8 *)&(es->__buf);
+	u8 *buf, *esbuf = (u8 *)&es->__buf;
 
 	pr_debug("%s entered es %p sec %llu off %d count %d\n",
 		__func__, es, (unsigned long long)sec, off, count);
@@ -1929,7 +1929,7 @@ s32 write_partial_entries_in_entry_set(struct super_block *sb,
 	struct chain_t dir;
 
 	/* vaidity check */
-	if (ep + count  > ((struct dentry_t *)&(es->__buf)) + es->num_entries)
+	if (ep + count  > ((struct dentry_t *)&es->__buf) + es->num_entries)
 		return FFS_ERROR;
 
 	dir.dir = GET_CLUSTER_FROM_SECTOR(es->sector);
@@ -1938,7 +1938,7 @@ s32 write_partial_entries_in_entry_set(struct super_block *sb,
 
 	byte_offset = (es->sector - START_SECTOR(dir.dir)) <<
 			p_bd->sector_size_bits;
-	byte_offset += ((void **)ep - &(es->__buf)) + es->offset;
+	byte_offset += ((void **)ep - &es->__buf) + es->offset;
 
 	ret = _walk_fat_chain(sb, &dir, byte_offset, &clu);
 	if (ret != FFS_SUCCESS)
@@ -2122,7 +2122,7 @@ s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir, s32 num_entries
 				p_fs->fs_func->set_entry_flag(ep, p_dir->flags);
 				buf_modify(sb, sector);
 
-				update_dir_checksum(sb, &(fid->dir),
+				update_dir_checksum(sb, &fid->dir,
 						    fid->entry);
 			}
 		}
diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c
index 3b2b0ceb7297..aa0d492fc673 100644
--- a/drivers/staging/exfat/exfat_super.c
+++ b/drivers/staging/exfat/exfat_super.c
@@ -1003,13 +1003,13 @@ static int ffsWriteFile(struct inode *inode, struct file_id_t *fid,
 
 	/* (3) update the direcoty entry */
 	if (p_fs->vol_type == EXFAT) {
-		es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+		es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
 					  ES_ALL_ENTRIES, &ep);
 		if (!es)
 			goto err_out;
 		ep2 = ep + 1;
 	} else {
-		ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, &sector);
+		ep = get_entry_in_dir(sb, &fid->dir, fid->entry, &sector);
 		if (!ep)
 			goto err_out;
 		ep2 = ep;
@@ -1142,7 +1142,7 @@ static int ffsTruncateFile(struct inode *inode, u64 old_size, u64 new_size)
 			}
 		ep2 = ep + 1;
 	} else {
-		ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, &sector);
+		ep = get_entry_in_dir(sb, &fid->dir, fid->entry, &sector);
 		if (!ep) {
 			ret = FFS_MEDIAERR;
 			goto out;
@@ -1277,7 +1277,7 @@ static int ffsMoveFile(struct inode *old_parent_inode, struct file_id_t *fid,
 
 		update_parent_info(new_fid, new_parent_inode);
 
-		p_dir = &(new_fid->dir);
+		p_dir = &new_fid->dir;
 		new_entry = new_fid->entry;
 		ep = get_entry_in_dir(sb, p_dir, new_entry, NULL);
 		if (!ep)
@@ -1438,14 +1438,14 @@ static int ffsSetAttr(struct inode *inode, u32 attr)
 
 	/* get the directory entry of given file */
 	if (p_fs->vol_type == EXFAT) {
-		es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+		es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
 					  ES_ALL_ENTRIES, &ep);
 		if (!es) {
 			ret = FFS_MEDIAERR;
 			goto out;
 		}
 	} else {
-		ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, &sector);
+		ep = get_entry_in_dir(sb, &fid->dir, fid->entry, &sector);
 		if (!ep) {
 			ret = FFS_MEDIAERR;
 			goto out;
@@ -1554,7 +1554,7 @@ static int ffsReadStat(struct inode *inode, struct dir_entry_t *info)
 
 	/* get the directory entry of given file or directory */
 	if (p_fs->vol_type == EXFAT) {
-		es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+		es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
 					  ES_2_ENTRIES, &ep);
 		if (!es) {
 			ret = FFS_MEDIAERR;
@@ -1562,7 +1562,7 @@ static int ffsReadStat(struct inode *inode, struct dir_entry_t *info)
 		}
 		ep2 = ep + 1;
 	} else {
-		ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, &sector);
+		ep = get_entry_in_dir(sb, &fid->dir, fid->entry, &sector);
 		if (!ep) {
 			ret = FFS_MEDIAERR;
 			goto out;
@@ -1594,11 +1594,11 @@ static int ffsReadStat(struct inode *inode, struct dir_entry_t *info)
 
 	memset((char *)&info->AccessTimestamp, 0, sizeof(struct date_time_t));
 
-	*(uni_name.name) = 0x0;
+	*uni_name.name = 0x0;
 	/* XXX this is very bad for exfat cuz name is already included in es.
 	 * API should be revised
 	 */
-	p_fs->fs_func->get_uni_name_from_ext_entry(sb, &(fid->dir), fid->entry,
+	p_fs->fs_func->get_uni_name_from_ext_entry(sb, &fid->dir, fid->entry,
 						   uni_name.name);
 	if (*uni_name.name == 0x0 && p_fs->vol_type != EXFAT)
 		get_uni_name_from_dos_entry(sb, (struct dos_dentry_t *)ep,
@@ -1678,7 +1678,7 @@ static int ffsWriteStat(struct inode *inode, struct dir_entry_t *info)
 
 	/* get the directory entry of given file or directory */
 	if (p_fs->vol_type == EXFAT) {
-		es = get_entry_set_in_dir(sb, &(fid->dir), fid->entry,
+		es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
 					  ES_ALL_ENTRIES, &ep);
 		if (!es) {
 			ret = FFS_MEDIAERR;
@@ -1687,7 +1687,7 @@ static int ffsWriteStat(struct inode *inode, struct dir_entry_t *info)
 		ep2 = ep + 1;
 	} else {
 		/* for other than exfat */
-		ep = get_entry_in_dir(sb, &(fid->dir), fid->entry, &sector);
+		ep = get_entry_in_dir(sb, &fid->dir, fid->entry, &sector);
 		if (!ep) {
 			ret = FFS_MEDIAERR;
 			goto out;
@@ -1845,7 +1845,7 @@ static int ffsMapCluster(struct inode *inode, s32 clu_offset, u32 *clu)
 		/* (3) update directory entry */
 		if (modified) {
 			if (p_fs->vol_type != EXFAT) {
-				ep = get_entry_in_dir(sb, &(fid->dir),
+				ep = get_entry_in_dir(sb, &fid->dir,
 						      fid->entry, &sector);
 				if (!ep) {
 					ret = FFS_MEDIAERR;
@@ -2058,7 +2058,7 @@ static int ffsReadDir(struct inode *inode, struct dir_entry_t *dir_entry)
 			memset((char *)&dir_entry->AccessTimestamp, 0,
 			       sizeof(struct date_time_t));
 
-			*(uni_name.name) = 0x0;
+			*uni_name.name = 0x0;
 			fs_func->get_uni_name_from_ext_entry(sb, &dir, dentry,
 							     uni_name.name);
 			if (*uni_name.name == 0x0 && p_fs->vol_type != EXFAT)
@@ -2116,7 +2116,7 @@ static int ffsReadDir(struct inode *inode, struct dir_entry_t *dir_entry)
 		}
 	}
 
-	*(dir_entry->Name) = '\0';
+	*dir_entry->Name = '\0';
 
 	fid->rwoffset = (s64)(++dentry);
 
@@ -2202,7 +2202,7 @@ static int exfat_readdir(struct file *filp, struct dir_context *ctx)
 	struct inode *inode = file_inode(filp);
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	struct fs_info_t *p_fs = &(sbi->fs_info);
+	struct fs_info_t *p_fs = &sbi->fs_info;
 	struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
 	struct dir_entry_t de;
 	unsigned long inum;
@@ -2293,7 +2293,7 @@ static int exfat_ioctl_volume_id(struct inode *dir)
 {
 	struct super_block *sb = dir->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	struct fs_info_t *p_fs = &(sbi->fs_info);
+	struct fs_info_t *p_fs = &sbi->fs_info;
 
 	return p_fs->vol_id;
 }
@@ -2895,7 +2895,7 @@ static void exfat_truncate(struct inode *inode, loff_t old_size)
 {
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	struct fs_info_t *p_fs = &(sbi->fs_info);
+	struct fs_info_t *p_fs = &sbi->fs_info;
 	int err;
 
 	__lock_super(sb);
@@ -3073,8 +3073,8 @@ static int exfat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
 {
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	struct fs_info_t *p_fs = &(sbi->fs_info);
-	struct bd_info_t *p_bd = &(sbi->bd_info);
+	struct fs_info_t *p_fs = &sbi->fs_info;
+	struct bd_info_t *p_bd = &sbi->bd_info;
 	const unsigned long blocksize = sb->s_blocksize;
 	const unsigned char blocksize_bits = sb->s_blocksize_bits;
 	sector_t last_block;
@@ -3302,7 +3302,7 @@ static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos)
 static int exfat_fill_inode(struct inode *inode, struct file_id_t *fid)
 {
 	struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
-	struct fs_info_t *p_fs = &(sbi->fs_info);
+	struct fs_info_t *p_fs = &sbi->fs_info;
 	struct dir_entry_t info;
 
 	memcpy(&(EXFAT_I(inode)->fid), fid, sizeof(struct file_id_t));
@@ -3787,7 +3787,7 @@ static int exfat_read_root(struct inode *inode)
 {
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
-	struct fs_info_t *p_fs = &(sbi->fs_info);
+	struct fs_info_t *p_fs = &sbi->fs_info;
 	struct dir_entry_t info;
 
 	EXFAT_I(inode)->fid.dir.dir = p_fs->root_dir;
-- 
2.20.1

[PATCH 2/6] staging: exfat: make alignment match open parenthesis

[Roi Martin]

Fix checkpatch.pl warning:

	CHECK: Alignment should match open parenthesis

Signed-off-by: Roi Martin <jroi.martin@gmail.com>
---
 drivers/staging/exfat/exfat_core.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index d8f4fad732c4..177787296ab9 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -1703,7 +1703,7 @@ struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
 	size_t bufsize;
 
 	pr_debug("%s entered p_dir dir %u flags %x size %d\n",
-		__func__, p_dir->dir, p_dir->flags, p_dir->size);
+		 __func__, p_dir->dir, p_dir->flags, p_dir->size);
 
 	byte_offset = entry << DENTRY_SIZE_BITS;
 	ret = _walk_fat_chain(sb, p_dir, byte_offset, &clu);
@@ -1835,8 +1835,8 @@ struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
 		*file_ep = (struct dentry_t *)&es->__buf;
 
 	pr_debug("%s exiting es %p sec %llu offset %d flags %d, num_entries %u buf ptr %p\n",
-		   __func__, es, (unsigned long long)es->sector, es->offset,
-		   es->alloc_flag, es->num_entries, &es->__buf);
+		 __func__, es, (unsigned long long)es->sector, es->offset,
+		 es->alloc_flag, es->num_entries, &es->__buf);
 	return es;
 err_out:
 	pr_debug("%s exited NULL (es %p)\n", __func__, es);
@@ -1862,7 +1862,7 @@ static s32 __write_partial_entries_in_entry_set(struct super_block *sb,
 	u8 *buf, *esbuf = (u8 *)&es->__buf;
 
 	pr_debug("%s entered es %p sec %llu off %d count %d\n",
-		__func__, es, (unsigned long long)sec, off, count);
+		 __func__, es, (unsigned long long)sec, off, count);
 	num_entries = count;
 
 	while (num_entries) {
@@ -1876,8 +1876,8 @@ static s32 __write_partial_entries_in_entry_set(struct super_block *sb,
 			goto err_out;
 		pr_debug("es->buf %p buf_off %u\n", esbuf, buf_off);
 		pr_debug("copying %d entries from %p to sector %llu\n",
-			copy_entries, (esbuf + buf_off),
-			(unsigned long long)sec);
+			 copy_entries, (esbuf + buf_off),
+			 (unsigned long long)sec);
 		memcpy(buf + off, esbuf + buf_off,
 		       copy_entries << DENTRY_SIZE_BITS);
 		buf_modify(sb, sec);
-- 
2.20.1

[PATCH 3/6] staging: exfat: remove unnecessary new line in if condition

[Roi Martin]

Fix checkpatch.pl warning:

	CHECK: Logical continuations should be on the previous line

Signed-off-by: Roi Martin <jroi.martin@gmail.com>
---
 drivers/staging/exfat/exfat_core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index 177787296ab9..4d6ea5c809d3 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -1727,8 +1727,7 @@ struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
 	ep = (struct dentry_t *)(buf + off);
 	entry_type = p_fs->fs_func->get_entry_type(ep);
 
-	if ((entry_type != TYPE_FILE)
-		&& (entry_type != TYPE_DIR))
+	if ((entry_type != TYPE_FILE) && (entry_type != TYPE_DIR))
 		goto err_out;
 
 	if (type == ES_ALL_ENTRIES)
-- 
2.20.1

[PATCH 4/6] staging: exfat: replace printk(KERN_INFO ...) with pr_info()

[Roi Martin]

Fix checkpatch.pl warning:

	WARNING: Prefer [subsystem eg: netdev]_info([subsystem]dev, ...
	then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...

Signed-off-by: Roi Martin <jroi.martin@gmail.com>
---
 drivers/staging/exfat/exfat_super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c
index aa0d492fc673..401f057fe924 100644
--- a/drivers/staging/exfat/exfat_super.c
+++ b/drivers/staging/exfat/exfat_super.c
@@ -396,7 +396,7 @@ static int ffsMountVol(struct super_block *sb)
 	if (i < 53) {
 #ifdef CONFIG_EXFAT_DONT_MOUNT_VFAT
 		ret = -EINVAL;
-		printk(KERN_INFO "EXFAT: Attempted to mount VFAT filesystem\n");
+		pr_info("EXFAT: Attempted to mount VFAT filesystem\n");
 		goto out;
 #else
 		if (GET16(p_pbr->bpb + 11)) /* num_fat_sectors */
-- 
2.20.1

[PATCH 5/6] staging: exfat: avoid multiple assignments

[Roi Martin]

Fix checkpatch.pl warning:

	CHECK: multiple assignments should be avoided

Signed-off-by: Roi Martin <jroi.martin@gmail.com>
---
 drivers/staging/exfat/exfat_core.c  |  3 +-
 drivers/staging/exfat/exfat_super.c | 90 +++++++++++++++++++++++------
 2 files changed, 73 insertions(+), 20 deletions(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index 4d6ea5c809d3..f446e6e6c4ee 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -470,7 +470,8 @@ s32 exfat_count_used_clusters(struct super_block *sb)
 	struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
 	struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
 
-	map_i = map_b = 0;
+	map_i = 0;
+	map_b = 0;
 
 	for (i = 2; i < p_fs->num_clusters; i += 8) {
 		k = *(((u8 *)p_fs->vol_amap[map_i]->b_data) + map_b);
diff --git a/drivers/staging/exfat/exfat_super.c b/drivers/staging/exfat/exfat_super.c
index 401f057fe924..278270a3cad6 100644
--- a/drivers/staging/exfat/exfat_super.c
+++ b/drivers/staging/exfat/exfat_super.c
@@ -864,7 +864,8 @@ static int ffsWriteFile(struct inode *inode, struct file_id_t *fid,
 
 	while (count > 0) {
 		clu_offset = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
-		clu = last_clu = fid->start_clu;
+		clu = fid->start_clu;
+		last_clu = fid->start_clu;
 
 		if (fid->flags == 0x03) {
 			if ((clu_offset > 0) && (clu != CLUSTER_32(~0))) {
@@ -2351,6 +2352,7 @@ static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 			bool excl)
 {
 	struct super_block *sb = dir->i_sb;
+	struct timespec64 curtime;
 	struct inode *inode;
 	struct file_id_t fid;
 	loff_t i_pos;
@@ -2375,7 +2377,10 @@ static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 		goto out;
 	}
 	INC_IVERSION(dir);
-	dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
+	curtime = current_time(dir);
+	dir->i_ctime = curtime;
+	dir->i_mtime = curtime;
+	dir->i_atime = curtime;
 	if (IS_DIRSYNC(dir))
 		(void)exfat_sync_inode(dir);
 	else
@@ -2389,7 +2394,10 @@ static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 		goto out;
 	}
 	INC_IVERSION(inode);
-	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_mtime = curtime;
+	inode->i_atime = curtime;
+	inode->i_ctime = curtime;
 	/*
 	 * timestamp is already written, so mark_inode_dirty() is unnecessary.
 	 */
@@ -2522,6 +2530,7 @@ static int exfat_unlink(struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
 	struct super_block *sb = dir->i_sb;
+	struct timespec64 curtime;
 	int err;
 
 	__lock_super(sb);
@@ -2539,14 +2548,18 @@ static int exfat_unlink(struct inode *dir, struct dentry *dentry)
 		goto out;
 	}
 	INC_IVERSION(dir);
-	dir->i_mtime = dir->i_atime = current_time(dir);
+	curtime = current_time(dir);
+	dir->i_mtime = curtime;
+	dir->i_atime = curtime;
 	if (IS_DIRSYNC(dir))
 		(void)exfat_sync_inode(dir);
 	else
 		mark_inode_dirty(dir);
 
 	clear_nlink(inode);
-	inode->i_mtime = inode->i_atime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_mtime = curtime;
+	inode->i_atime = curtime;
 	exfat_detach(inode);
 	remove_inode_hash(inode);
 
@@ -2560,6 +2573,7 @@ static int exfat_symlink(struct inode *dir, struct dentry *dentry,
 			 const char *target)
 {
 	struct super_block *sb = dir->i_sb;
+	struct timespec64 curtime;
 	struct inode *inode;
 	struct file_id_t fid;
 	loff_t i_pos;
@@ -2597,7 +2611,10 @@ static int exfat_symlink(struct inode *dir, struct dentry *dentry,
 	}
 
 	INC_IVERSION(dir);
-	dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
+	curtime = current_time(dir);
+	dir->i_ctime = curtime;
+	dir->i_mtime = curtime;
+	dir->i_atime = curtime;
 	if (IS_DIRSYNC(dir))
 		(void)exfat_sync_inode(dir);
 	else
@@ -2611,7 +2628,10 @@ static int exfat_symlink(struct inode *dir, struct dentry *dentry,
 		goto out;
 	}
 	INC_IVERSION(inode);
-	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_mtime = curtime;
+	inode->i_atime = curtime;
+	inode->i_ctime = curtime;
 	/* timestamp is already written, so mark_inode_dirty() is unneeded. */
 
 	EXFAT_I(inode)->target = kmemdup(target, len + 1, GFP_KERNEL);
@@ -2632,6 +2652,7 @@ static int exfat_symlink(struct inode *dir, struct dentry *dentry,
 static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
 	struct super_block *sb = dir->i_sb;
+	struct timespec64 curtime;
 	struct inode *inode;
 	struct file_id_t fid;
 	loff_t i_pos;
@@ -2656,7 +2677,10 @@ static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 		goto out;
 	}
 	INC_IVERSION(dir);
-	dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
+	curtime = current_time(dir);
+	dir->i_ctime = curtime;
+	dir->i_mtime = curtime;
+	dir->i_atime = curtime;
 	if (IS_DIRSYNC(dir))
 		(void)exfat_sync_inode(dir);
 	else
@@ -2671,7 +2695,10 @@ static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 		goto out;
 	}
 	INC_IVERSION(inode);
-	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_mtime = curtime;
+	inode->i_atime = curtime;
+	inode->i_ctime = curtime;
 	/* timestamp is already written, so mark_inode_dirty() is unneeded. */
 
 	dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
@@ -2687,6 +2714,7 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
 {
 	struct inode *inode = dentry->d_inode;
 	struct super_block *sb = dir->i_sb;
+	struct timespec64 curtime;
 	int err;
 
 	__lock_super(sb);
@@ -2710,7 +2738,9 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
 		goto out;
 	}
 	INC_IVERSION(dir);
-	dir->i_mtime = dir->i_atime = current_time(dir);
+	curtime = current_time(dir);
+	dir->i_mtime = curtime;
+	dir->i_atime = curtime;
 	if (IS_DIRSYNC(dir))
 		(void)exfat_sync_inode(dir);
 	else
@@ -2718,7 +2748,9 @@ static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
 	drop_nlink(dir);
 
 	clear_nlink(inode);
-	inode->i_mtime = inode->i_atime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_mtime = curtime;
+	inode->i_atime = curtime;
 	exfat_detach(inode);
 	remove_inode_hash(inode);
 
@@ -2734,6 +2766,7 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
 {
 	struct inode *old_inode, *new_inode;
 	struct super_block *sb = old_dir->i_sb;
+	struct timespec64 curtime;
 	loff_t i_pos;
 	int err;
 
@@ -2767,8 +2800,11 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
 		goto out;
 	}
 	INC_IVERSION(new_dir);
-	new_dir->i_ctime = new_dir->i_mtime = new_dir->i_atime =
-				current_time(new_dir);
+	curtime = current_time(new_dir);
+	new_dir->i_ctime = curtime;
+	new_dir->i_mtime = curtime;
+	new_dir->i_atime = curtime;
+
 	if (IS_DIRSYNC(new_dir))
 		(void)exfat_sync_inode(new_dir);
 	else
@@ -2790,7 +2826,9 @@ static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
 			inc_nlink(new_dir);
 	}
 	INC_IVERSION(old_dir);
-	old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
+	curtime = current_time(old_dir);
+	old_dir->i_ctime = curtime;
+	old_dir->i_mtime = curtime;
 	if (IS_DIRSYNC(old_dir))
 		(void)exfat_sync_inode(old_dir);
 	else
@@ -2814,13 +2852,16 @@ static int exfat_cont_expand(struct inode *inode, loff_t size)
 {
 	struct address_space *mapping = inode->i_mapping;
 	loff_t start = i_size_read(inode), count = size - i_size_read(inode);
+	struct timespec64 curtime;
 	int err, err2;
 
 	err = generic_cont_expand_simple(inode, size);
 	if (err != 0)
 		return err;
 
-	inode->i_ctime = inode->i_mtime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_ctime = curtime;
+	inode->i_mtime = curtime;
 	mark_inode_dirty(inode);
 
 	if (IS_SYNC(inode)) {
@@ -2896,6 +2937,7 @@ static void exfat_truncate(struct inode *inode, loff_t old_size)
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	struct fs_info_t *p_fs = &sbi->fs_info;
+	struct timespec64 curtime;
 	int err;
 
 	__lock_super(sb);
@@ -2914,7 +2956,9 @@ static void exfat_truncate(struct inode *inode, loff_t old_size)
 	if (err)
 		goto out;
 
-	inode->i_ctime = inode->i_mtime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_ctime = curtime;
+	inode->i_mtime = curtime;
 	if (IS_DIRSYNC(inode))
 		(void)exfat_sync_inode(inode);
 	else
@@ -3215,6 +3259,7 @@ static int exfat_write_end(struct file *file, struct address_space *mapping,
 {
 	struct inode *inode = mapping->host;
 	struct file_id_t *fid = &(EXFAT_I(inode)->fid);
+	struct timespec64 curtime;
 	int err;
 
 	err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
@@ -3223,7 +3268,9 @@ static int exfat_write_end(struct file *file, struct address_space *mapping,
 		exfat_write_failed(mapping, pos + len);
 
 	if (!(err < 0) && !(fid->attr & ATTR_ARCHIVE)) {
-		inode->i_mtime = inode->i_ctime = current_time(inode);
+		curtime = current_time(inode);
+		inode->i_mtime = curtime;
+		inode->i_ctime = curtime;
 		fid->attr |= ATTR_ARCHIVE;
 		mark_inode_dirty(inode);
 	}
@@ -3674,7 +3721,8 @@ static int parse_options(char *options, int silent, int *debug,
 
 	opts->fs_uid = current_uid();
 	opts->fs_gid = current_gid();
-	opts->fs_fmask = opts->fs_dmask = current->fs->umask;
+	opts->fs_fmask = current->fs->umask;
+	opts->fs_dmask = current->fs->umask;
 	opts->allow_utime = U16_MAX;
 	opts->codepage = exfat_default_codepage;
 	opts->iocharset = exfat_default_iocharset;
@@ -3788,6 +3836,7 @@ static int exfat_read_root(struct inode *inode)
 	struct super_block *sb = inode->i_sb;
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	struct fs_info_t *p_fs = &sbi->fs_info;
+	struct timespec64 curtime;
 	struct dir_entry_t info;
 
 	EXFAT_I(inode)->fid.dir.dir = p_fs->root_dir;
@@ -3818,7 +3867,10 @@ static int exfat_read_root(struct inode *inode)
 	EXFAT_I(inode)->mmu_private = i_size_read(inode);
 
 	exfat_save_attr(inode, ATTR_SUBDIR);
-	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
+	curtime = current_time(inode);
+	inode->i_mtime = curtime;
+	inode->i_atime = curtime;
+	inode->i_ctime = curtime;
 	set_nlink(inode, info.NumSubdirs + 2);
 
 	return 0;
-- 
2.20.1

[PATCH 6/6] staging: exfat: replace kmalloc with kmalloc_array

[Roi Martin]

Replace expressions of the form:
	kmalloc(count * size, GFP_KERNEL);
With:
	kmalloc_array(count, size, GFP_KERNEL);

Signed-off-by: Roi Martin <jroi.martin@gmail.com>
---
 drivers/staging/exfat/exfat_core.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/exfat/exfat_core.c b/drivers/staging/exfat/exfat_core.c
index f446e6e6c4ee..a9391f0b8141 100644
--- a/drivers/staging/exfat/exfat_core.c
+++ b/drivers/staging/exfat/exfat_core.c
@@ -713,8 +713,8 @@ static s32 __load_upcase_table(struct super_block *sb, sector_t sector,
 
 	u32 checksum = 0;
 
-	upcase_table = p_fs->vol_utbl = kmalloc(UTBL_COL_COUNT * sizeof(u16 *),
-						GFP_KERNEL);
+	upcase_table = kmalloc_array(UTBL_COL_COUNT, sizeof(u16 *), GFP_KERNEL);
+	p_fs->vol_utbl = upcase_table;
 	if (!upcase_table)
 		return FFS_MEMORYERR;
 	memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *));
@@ -793,8 +793,8 @@ static s32 __load_default_upcase_table(struct super_block *sb)
 	u16	uni = 0;
 	u16 **upcase_table;
 
-	upcase_table = p_fs->vol_utbl = kmalloc(UTBL_COL_COUNT * sizeof(u16 *),
-						GFP_KERNEL);
+	upcase_table = kmalloc_array(UTBL_COL_COUNT, sizeof(u16 *), GFP_KERNEL);
+	p_fs->vol_utbl = upcase_table;
 	if (!upcase_table)
 		return FFS_MEMORYERR;
 	memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *));
-- 
2.20.1

Re: [PATCH 6/6] staging: exfat: replace kmalloc with kmalloc_array

[Greg KH]

On Wed, Oct 30, 2019 at 02:03:28AM +0100, Roi Martin wrote:
> Replace expressions of the form:
> 	kmalloc(count * size, GFP_KERNEL);
> With:
> 	kmalloc_array(count, size, GFP_KERNEL);
> 
> Signed-off-by: Roi Martin <jroi.martin@gmail.com>
> ---
>  drivers/staging/exfat/exfat_core.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

This patch failed to apply.  Please fix it up and resend it as a new
version.

thanks,

greg k-h

Re: [PATCH 6/6] staging: exfat: replace kmalloc with kmalloc_array

[Roi Martin]

> This patch failed to apply.  Please fix it up and resend it as a new
> version.

I have rebased the patch against the branch "staging-testing" of the
tree:

https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git

And sent the new version.

Thanks,

	Roi Martin