[PATCH 1/2] btrfs-progs: utils: Replace __attribute__(fallthrough)

[Marcos Paulo de Souza <marcos.souza.org@gmail.com>]

From: Marcos Paulo de Souza <mpdesouza@suse.com>

When compiling with clang, this warning is shown:

common/utils.c:404:3: warning: declaration does not declare anything [-Wmissing-declarations]
                __attribute__ ((fallthrough));

This attribute seems to silence the same warning in GCC. Changing this
attribute with /* fallthrough */ fixes the warning for both gcc and
clang.

Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
---
 common/utils.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/common/utils.c b/common/utils.c
index 2cf15c33..a88336b3 100644
--- a/common/utils.c
+++ b/common/utils.c
@@ -401,15 +401,15 @@ int pretty_size_snprintf(u64 size, char *str, size_t str_size, unsigned unit_mod
 	case UNITS_TBYTES:
 		base *= mult;
 		num_divs++;
-		__attribute__ ((fallthrough));
+		/* fallthrough */
 	case UNITS_GBYTES:
 		base *= mult;
 		num_divs++;
-		__attribute__ ((fallthrough));
+		/* fallthrough */
 	case UNITS_MBYTES:
 		base *= mult;
 		num_divs++;
-		__attribute__ ((fallthrough));
+		/* fallthrough */
 	case UNITS_KBYTES:
 		num_divs++;
 		break;
@@ -1135,14 +1135,14 @@ int test_num_disk_vs_raid(u64 metadata_profile, u64 data_profile,
 	default:
 	case 4:
 		allowed |= BTRFS_BLOCK_GROUP_RAID10;
-		__attribute__ ((fallthrough));
+		/* fallthrough */
 	case 3:
 		allowed |= BTRFS_BLOCK_GROUP_RAID6;
-		__attribute__ ((fallthrough));
+		/* fallthrough */
 	case 2:
 		allowed |= BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
 			BTRFS_BLOCK_GROUP_RAID5;
-		__attribute__ ((fallthrough));
+		/* fallthrough */
 	case 1:
 		allowed |= BTRFS_BLOCK_GROUP_DUP;
 	}
-- 
2.23.0