f2fs: guard macro variables with braces

Add braces around variables used within macros for those make sense
to do it. Many of the macros in f2fs already do this. What this commit
doesn't do is anything that changes line# as a result of adding braces,
which usually affects the binary via __LINE__.

Confirmed no diff in fs/f2fs/f2fs.ko before/after this commit on x86_64,
to make sure this has no functional change as well as there's been no
unexpected side effect due to callers' arithmetics within the existing
code.

Signed-off-by: Tomohiro Kusumi <[e-mail]>
Signed-off-by: Jaegeuk Kim <[e-mail]>

fs/f2fs/f2fs.h

···
 };
 
 extern char *fault_name[FAULT_MAX];
-#define IS_FAULT_SET(fi, type) (fi->inject_type & (1 << (type)))
+#define IS_FAULT_SET(fi, type) ((fi)->inject_type & (1 << (type)))
 #endif
 
 /*
···
 #define F2FS_MOUNT_ADAPTIVE		0x00020000
 #define F2FS_MOUNT_LFS			0x00040000
 
-#define clear_opt(sbi, option)	(sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
-#define set_opt(sbi, option)	(sbi->mount_opt.opt |= F2FS_MOUNT_##option)
-#define test_opt(sbi, option)	(sbi->mount_opt.opt & F2FS_MOUNT_##option)
+#define clear_opt(sbi, option)	((sbi)->mount_opt.opt &= ~F2FS_MOUNT_##option)
+#define set_opt(sbi, option)	((sbi)->mount_opt.opt |= F2FS_MOUNT_##option)
+#define test_opt(sbi, option)	((sbi)->mount_opt.opt & F2FS_MOUNT_##option)
 
 #define ver_after(a, b)	(typecheck(unsigned long long, a) &&		\
 		typecheck(unsigned long long, b) &&			\
···
 	block_t last_dentry;	/* block address locating the last dentry */
 };
 
-#define nats_in_cursum(jnl)		(le16_to_cpu(jnl->n_nats))
-#define sits_in_cursum(jnl)		(le16_to_cpu(jnl->n_sits))
+#define nats_in_cursum(jnl)		(le16_to_cpu((jnl)->n_nats))
+#define sits_in_cursum(jnl)		(le16_to_cpu((jnl)->n_sits))
 
-#define nat_in_journal(jnl, i)		(jnl->nat_j.entries[i].ne)
-#define nid_in_journal(jnl, i)		(jnl->nat_j.entries[i].nid)
-#define sit_in_journal(jnl, i)		(jnl->sit_j.entries[i].se)
-#define segno_in_journal(jnl, i)	(jnl->sit_j.entries[i].segno)
+#define nat_in_journal(jnl, i)		((jnl)->nat_j.entries[i].ne)
+#define nid_in_journal(jnl, i)		((jnl)->nat_j.entries[i].nid)
+#define sit_in_journal(jnl, i)		((jnl)->sit_j.entries[i].se)
+#define segno_in_journal(jnl, i)	((jnl)->sit_j.entries[i].segno)
 
 #define MAX_NAT_JENTRIES(jnl)	(NAT_JOURNAL_ENTRIES - nats_in_cursum(jnl))
 #define MAX_SIT_JENTRIES(jnl)	(SIT_JOURNAL_ENTRIES - sits_in_cursum(jnl))
···
 	bool submitted;		/* indicate IO submission */
 };
 
-#define is_read_io(rw) (rw == READ)
+#define is_read_io(rw) ((rw) == READ)
 struct f2fs_bio_info {
 	struct f2fs_sb_info *sbi;	/* f2fs superblock */
 	struct bio *bio;		/* bios to merge */
···
  * and the return value is in kbytes. s is of struct f2fs_sb_info.
  */
 #define BD_PART_WRITTEN(s)						 \
-(((u64)part_stat_read(s->sb->s_bdev->bd_part, sectors[1]) -		 \
-		s->sectors_written_start) >> 1)
+(((u64)part_stat_read((s)->sb->s_bdev->bd_part, sectors[1]) -		 \
+		(s)->sectors_written_start) >> 1)
 
 static inline void f2fs_update_time(struct f2fs_sb_info *sbi, int type)
 {
···
 #define stat_inc_seg_count(sbi, type, gc_type)				\
 	do {								\
 		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
-		(si)->tot_segs++;					\
-		if (type == SUM_TYPE_DATA) {				\
+		si->tot_segs++;						\
+		if ((type) == SUM_TYPE_DATA) {				\
 			si->data_segs++;				\
 			si->bg_data_segs += (gc_type == BG_GC) ? 1 : 0;	\
 		} else {						\
···
 	} while (0)
 
 #define stat_inc_tot_blk_count(si, blks)				\
-	(si->tot_blks += (blks))
+	((si)->tot_blks += (blks))
 
 #define stat_inc_data_blk_count(sbi, blks, gc_type)			\
 	do {								\
 		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
 		stat_inc_tot_blk_count(si, blks);			\
 		si->data_blks += (blks);				\
-		si->bg_data_blks += (gc_type == BG_GC) ? (blks) : 0;	\
+		si->bg_data_blks += ((gc_type) == BG_GC) ? (blks) : 0;	\
 	} while (0)
 
 #define stat_inc_node_blk_count(sbi, blks, gc_type)			\
···
 		struct f2fs_stat_info *si = F2FS_STAT(sbi);		\
 		stat_inc_tot_blk_count(si, blks);			\
 		si->node_blks += (blks);				\
-		si->bg_node_blks += (gc_type == BG_GC) ? (blks) : 0;	\
+		si->bg_node_blks += ((gc_type) == BG_GC) ? (blks) : 0;	\
 	} while (0)
 
 int f2fs_build_stats(struct f2fs_sb_info *sbi);

fs/f2fs/node.c

···
 #include "trace.h"
 #include <trace/events/f2fs.h>
 
-#define on_build_free_nids(nmi) mutex_is_locked(&nm_i->build_lock)
+#define on_build_free_nids(nmi) mutex_is_locked(&(nm_i)->build_lock)
 
 static struct kmem_cache *nat_entry_slab;
 static struct kmem_cache *free_nid_slab;

fs/f2fs/node.h

···
  * published by the Free Software Foundation.
  */
 /* start node id of a node block dedicated to the given node id */
-#define	START_NID(nid) ((nid / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)
+#define	START_NID(nid) (((nid) / NAT_ENTRY_PER_BLOCK) * NAT_ENTRY_PER_BLOCK)
 
 /* node block offset on the NAT area dedicated to the given start node id */
-#define	NAT_BLOCK_OFFSET(start_nid) (start_nid / NAT_ENTRY_PER_BLOCK)
+#define	NAT_BLOCK_OFFSET(start_nid) ((start_nid) / NAT_ENTRY_PER_BLOCK)
 
 /* # of pages to perform synchronous readahead before building free nids */
 #define FREE_NID_PAGES	8
···
 	struct node_info ni;	/* in-memory node information */
 };
 
-#define nat_get_nid(nat)		(nat->ni.nid)
-#define nat_set_nid(nat, n)		(nat->ni.nid = n)
-#define nat_get_blkaddr(nat)		(nat->ni.blk_addr)
-#define nat_set_blkaddr(nat, b)		(nat->ni.blk_addr = b)
-#define nat_get_ino(nat)		(nat->ni.ino)
-#define nat_set_ino(nat, i)		(nat->ni.ino = i)
-#define nat_get_version(nat)		(nat->ni.version)
-#define nat_set_version(nat, v)		(nat->ni.version = v)
+#define nat_get_nid(nat)		((nat)->ni.nid)
+#define nat_set_nid(nat, n)		((nat)->ni.nid = (n))
+#define nat_get_blkaddr(nat)		((nat)->ni.blk_addr)
+#define nat_set_blkaddr(nat, b)		((nat)->ni.blk_addr = (b))
+#define nat_get_ino(nat)		((nat)->ni.ino)
+#define nat_set_ino(nat, i)		((nat)->ni.ino = (i))
+#define nat_get_version(nat)		((nat)->ni.version)
+#define nat_set_version(nat, v)		((nat)->ni.version = (v))
 
-#define inc_node_version(version)	(++version)
+#define inc_node_version(version)	(++(version))
 
 static inline void copy_node_info(struct node_info *dst,
 						struct node_info *src)

fs/f2fs/segment.h

···
 #define F2FS_MIN_SEGMENTS	9 /* SB + 2 (CP + SIT + NAT) + SSA + MAIN */
 
 /* L: Logical segment # in volume, R: Relative segment # in main area */
-#define GET_L2R_SEGNO(free_i, segno)	(segno - free_i->start_segno)
-#define GET_R2L_SEGNO(free_i, segno)	(segno + free_i->start_segno)
+#define GET_L2R_SEGNO(free_i, segno)	((segno) - (free_i)->start_segno)
+#define GET_R2L_SEGNO(free_i, segno)	((segno) + (free_i)->start_segno)
 
-#define IS_DATASEG(t)	(t <= CURSEG_COLD_DATA)
-#define IS_NODESEG(t)	(t >= CURSEG_HOT_NODE)
+#define IS_DATASEG(t)	((t) <= CURSEG_COLD_DATA)
+#define IS_NODESEG(t)	((t) >= CURSEG_HOT_NODE)
 
 #define IS_CURSEG(sbi, seg)						\
-	((seg == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) ||	\
-	 (seg == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) ||	\
-	 (seg == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) ||	\
-	 (seg == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) ||	\
-	 (seg == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) ||	\
-	 (seg == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno))
+	(((seg) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno) ||	\
+	 ((seg) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno) ||	\
+	 ((seg) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno) ||	\
+	 ((seg) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno) ||	\
+	 ((seg) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno) ||	\
+	 ((seg) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno))
 
 #define IS_CURSEC(sbi, secno)						\
-	((secno == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno /		\
-	  sbi->segs_per_sec) ||	\
-	 (secno == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno /		\
-	  sbi->segs_per_sec) ||	\
-	 (secno == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno /		\
-	  sbi->segs_per_sec) ||	\
-	 (secno == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno /		\
-	  sbi->segs_per_sec) ||	\
-	 (secno == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno /		\
-	  sbi->segs_per_sec) ||	\
-	 (secno == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno /		\
-	  sbi->segs_per_sec))	\
+	(((secno) == CURSEG_I(sbi, CURSEG_HOT_DATA)->segno /		\
+	  (sbi)->segs_per_sec) ||	\
+	 ((secno) == CURSEG_I(sbi, CURSEG_WARM_DATA)->segno /		\
+	  (sbi)->segs_per_sec) ||	\
+	 ((secno) == CURSEG_I(sbi, CURSEG_COLD_DATA)->segno /		\
+	  (sbi)->segs_per_sec) ||	\
+	 ((secno) == CURSEG_I(sbi, CURSEG_HOT_NODE)->segno /		\
+	  (sbi)->segs_per_sec) ||	\
+	 ((secno) == CURSEG_I(sbi, CURSEG_WARM_NODE)->segno /		\
+	  (sbi)->segs_per_sec) ||	\
+	 ((secno) == CURSEG_I(sbi, CURSEG_COLD_NODE)->segno /		\
+	  (sbi)->segs_per_sec))	\
 
 #define MAIN_BLKADDR(sbi)	(SM_I(sbi)->main_blkaddr)
 #define SEG0_BLKADDR(sbi)	(SM_I(sbi)->seg0_blkaddr)
 
 #define MAIN_SEGS(sbi)	(SM_I(sbi)->main_segments)
-#define MAIN_SECS(sbi)	(sbi->total_sections)
+#define MAIN_SECS(sbi)	((sbi)->total_sections)
 
 #define TOTAL_SEGS(sbi)	(SM_I(sbi)->segment_count)
-#define TOTAL_BLKS(sbi)	(TOTAL_SEGS(sbi) << sbi->log_blocks_per_seg)
+#define TOTAL_BLKS(sbi)	(TOTAL_SEGS(sbi) << (sbi)->log_blocks_per_seg)
 
 #define MAX_BLKADDR(sbi)	(SEG0_BLKADDR(sbi) + TOTAL_BLKS(sbi))
-#define SEGMENT_SIZE(sbi)	(1ULL << (sbi->log_blocksize +		\
-					sbi->log_blocks_per_seg))
+#define SEGMENT_SIZE(sbi)	(1ULL << ((sbi)->log_blocksize +	\
+					(sbi)->log_blocks_per_seg))
 
 #define START_BLOCK(sbi, segno)	(SEG0_BLKADDR(sbi) +			\
-	 (GET_R2L_SEGNO(FREE_I(sbi), segno) << sbi->log_blocks_per_seg))
+	 (GET_R2L_SEGNO(FREE_I(sbi), segno) << (sbi)->log_blocks_per_seg))
 
 #define NEXT_FREE_BLKADDR(sbi, curseg)					\
-	(START_BLOCK(sbi, curseg->segno) + curseg->next_blkoff)
+	(START_BLOCK(sbi, (curseg)->segno) + (curseg)->next_blkoff)
 
 #define GET_SEGOFF_FROM_SEG0(sbi, blk_addr)	((blk_addr) - SEG0_BLKADDR(sbi))
 #define GET_SEGNO_FROM_SEG0(sbi, blk_addr)				\
-	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> sbi->log_blocks_per_seg)
+	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) >> (sbi)->log_blocks_per_seg)
 #define GET_BLKOFF_FROM_SEG0(sbi, blk_addr)				\
-	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & (sbi->blocks_per_seg - 1))
+	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1))
 
 #define GET_SEGNO(sbi, blk_addr)					\
-	(((blk_addr == NULL_ADDR) || (blk_addr == NEW_ADDR)) ?		\
+	((((blk_addr) == NULL_ADDR) || ((blk_addr) == NEW_ADDR)) ?	\
 	NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi),			\
 		GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
 #define GET_SECNO(sbi, segno)					\
-	((segno) / sbi->segs_per_sec)
+	((segno) / (sbi)->segs_per_sec)
 #define GET_ZONENO_FROM_SEGNO(sbi, segno)				\
-	((segno / sbi->segs_per_sec) / sbi->secs_per_zone)
+	(((segno) / (sbi)->segs_per_sec) / (sbi)->secs_per_zone)
 
 #define GET_SUM_BLOCK(sbi, segno)				\
-	((sbi->sm_info->ssa_blkaddr) + segno)
+	((sbi)->sm_info->ssa_blkaddr + (segno))
 
 #define GET_SUM_TYPE(footer) ((footer)->entry_type)
-#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = type)
+#define SET_SUM_TYPE(footer, type) ((footer)->entry_type = (type))
 
 #define SIT_ENTRY_OFFSET(sit_i, segno)					\
-	(segno % sit_i->sents_per_block)
+	((segno) % (sit_i)->sents_per_block)
 #define SIT_BLOCK_OFFSET(segno)					\
-	(segno / SIT_ENTRY_PER_BLOCK)
+	((segno) / SIT_ENTRY_PER_BLOCK)
 #define	START_SEGNO(segno)		\
 	(SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK)
 #define SIT_BLK_CNT(sbi)			\
···
 #define SECTOR_FROM_BLOCK(blk_addr)					\
 	(((sector_t)blk_addr) << F2FS_LOG_SECTORS_PER_BLOCK)
 #define SECTOR_TO_BLOCK(sectors)					\
-	(sectors >> F2FS_LOG_SECTORS_PER_BLOCK)
+	((sectors) >> F2FS_LOG_SECTORS_PER_BLOCK)
 
 /*
  * indicate a block allocation direction: RIGHT and LEFT.

fs/f2fs/xattr.h

···
 #define XATTR_FIRST_ENTRY(ptr)	(XATTR_ENTRY(XATTR_HDR(ptr) + 1))
 #define XATTR_ROUND		(3)
 
-#define XATTR_ALIGN(size)	((size + XATTR_ROUND) & ~XATTR_ROUND)
+#define XATTR_ALIGN(size)	(((size) + XATTR_ROUND) & ~XATTR_ROUND)
 
 #define ENTRY_SIZE(entry) (XATTR_ALIGN(sizeof(struct f2fs_xattr_entry) + \
-			entry->e_name_len + le16_to_cpu(entry->e_value_size)))
+			(entry)->e_name_len + le16_to_cpu((entry)->e_value_size)))
 
 #define XATTR_NEXT_ENTRY(entry)	((struct f2fs_xattr_entry *)((char *)(entry) +\
 			ENTRY_SIZE(entry)))