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btrfs-progs: Fix -Wimplicit-fallthrough warning 

Although most fallthrough cases are pretty obvious, we still need to
teach hint the compiler that it's an explicit fallthrough. The
annotation is not standardized and sometimes comments are used, the
attribute is getting more widespread so we're going to use it too.
Unknown attributes are ignored by old compilers.

Also reformat the code to use common indentation.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
master
Qu Wenruo 2018-12-05 14:40:10 +08:00 committed by David Sterba
parent 32b86071cf
commit 436677aab0
1 changed files with 22 additions and 8 deletions
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30
utils.c
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@ -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) {