fs/ext4: replace ternary operator with min()/max() and min_t()

Fix the following coccicheck warning:

fs/ext4/inline.c:183: WARNING opportunity for min().
fs/ext4/extents.c:2631: WARNING opportunity for max().
fs/ext4/extents.c:2632: WARNING opportunity for min().
fs/ext4/extents.c:5559: WARNING opportunity for max().
fs/ext4/super.c:6908: WARNING opportunity for min().

min()/max() and min_t() macro is defined in include/linux/minmax.h.
It avoids multiple evaluations of the arguments when non-constant and
performs strict type-checking.
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Jiangshan Yi <yijiangshan@kylinos.cn>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Link: https://lore.kernel.org/r/20220817025928.612851-1-13667453960@163.comSigned-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/extents.c

@@ -2635,9 +2635,8 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
 			  unwritten, ex_ee_len);
 		path[depth].p_ext = ex;
 
-		a = ex_ee_block > start ? ex_ee_block : start;
-		b = ex_ee_block+ex_ee_len - 1 < end ?
-			ex_ee_block+ex_ee_len - 1 : end;
+		a = max(ex_ee_block, start);
+		b = min(ex_ee_block + ex_ee_len - 1, end);
 
 		ext_debug(inode, "  border %u:%u\n", a, b);
 
@@ -5567,8 +5566,7 @@ static int ext4_insert_range(struct file *file, loff_t offset, loff_t len)
 	 * ee_start_lblk to shift extents
 	 */
 	ret = ext4_ext_shift_extents(inode, handle,
-		ee_start_lblk > offset_lblk ? ee_start_lblk : offset_lblk,
-		len_lblk, SHIFT_RIGHT);
+		max(ee_start_lblk, offset_lblk), len_lblk, SHIFT_RIGHT);
 
 	up_write(&EXT4_I(inode)->i_data_sem);
 	if (IS_SYNC(inode))

fs/ext4/inline.c

@@ -180,8 +180,7 @@ static int ext4_read_inline_data(struct inode *inode, void *buffer,
 
 	BUG_ON(len > EXT4_I(inode)->i_inline_size);
 
-	cp_len = len < EXT4_MIN_INLINE_DATA_SIZE ?
-			len : EXT4_MIN_INLINE_DATA_SIZE;
+	cp_len = min_t(unsigned int, len, EXT4_MIN_INLINE_DATA_SIZE);
 
 	raw_inode = ext4_raw_inode(iloc);
 	memcpy(buffer, (void *)(raw_inode->i_block), cp_len);

fs/ext4/super.c

@@ -7031,8 +7031,7 @@ static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data,
 		len = i_size-off;
 	toread = len;
 	while (toread > 0) {
-		tocopy = sb->s_blocksize - offset < toread ?
-				sb->s_blocksize - offset : toread;
+		tocopy = min_t(unsigned long, sb->s_blocksize - offset, toread);
 		bh = ext4_bread(NULL, inode, blk, 0);
 		if (IS_ERR(bh))
 			return PTR_ERR(bh);