[PATCH 5/9] btrfs-progs: Fix Wimplicit-fallthrough warning

[Qu Wenruo]

Although most fallthrough case is pretty obvious, we still need to teach
the dumb compiler that it's an explicit fallthrough.

Also reformat the code to use common indent.

Signed-off-by: Qu Wenruo <w...@suse.com>
---
 utils.c | 30 ++++++++++++++++++++++--------
 1 file changed, 22 insertions(+), 8 deletions(-)

diff --git a/utils.c b/utils.c
index a310300829eb..b274f46fdd9d 100644
--- a/utils.c
+++ b/utils.c
@@ -1134,15 +1134,25 @@ int pretty_size_snprintf(u64 size, char *str, size_t 
str_size, unsigned unit_mod
        num_divs = 0;
        last_size = size;
        switch (unit_mode & UNITS_MODE_MASK) {
-       case UNITS_TBYTES: base *= mult; num_divs++;
-       case UNITS_GBYTES: base *= mult; num_divs++;
-       case UNITS_MBYTES: base *= mult; num_divs++;
-       case UNITS_KBYTES: num_divs++;
-                          break;
+       case UNITS_TBYTES:
+               base *= mult;
+               num_divs++;
+               __attribute__ ((fallthrough));
+       case UNITS_GBYTES:
+               base *= mult;
+               num_divs++;
+               __attribute__ ((fallthrough));
+       case UNITS_MBYTES:
+               base *= mult;
+               num_divs++;
+               __attribute__ ((fallthrough));
+       case UNITS_KBYTES:
+               num_divs++;
+               break;
        case UNITS_BYTES:
-                          base = 1;
-                          num_divs = 0;
-                          break;
+               base = 1;
+               num_divs = 0;
+               break;
        default:
                if (negative) {
                        s64 ssize = (s64)size;
@@ -1907,13 +1917,17 @@ int test_num_disk_vs_raid(u64 metadata_profile, u64 
data_profile,
        default:
        case 4:
                allowed |= BTRFS_BLOCK_GROUP_RAID10;
+               __attribute__ ((fallthrough));
        case 3:
                allowed |= BTRFS_BLOCK_GROUP_RAID6;
+               __attribute__ ((fallthrough));
        case 2:
                allowed |= BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
                        BTRFS_BLOCK_GROUP_RAID5;
+               __attribute__ ((fallthrough));
        case 1:
                allowed |= BTRFS_BLOCK_GROUP_DUP;
+               __attribute__ ((fallthrough));
        }
 
        if (dev_cnt > 1 && profile & BTRFS_BLOCK_GROUP_DUP) {
-- 
2.19.1