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btrfs: Remove redundant FLAG_VACANCY

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Commit 9036c10208 ("Btrfs: update hole handling v2") added the
FLAG_VACANCY to denote holes, however there was already a consistent way
of flagging extents which represent hole - ->block_start =
EXTENT_MAP_HOLE. And also the only place where this flag is checked is
in the fiemap code, but the block_start value is also checked and every
other place in the filesystem detects holes by using block_start
value's. So remove the extra flag. This survived a full xfstest run.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2017-11-23 10:51:43 +02:00 • committed by David Sterba
commit 4a2d25cd93
5 changed files with 1 additions and 11 deletions
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1
include/trace/events/btrfs.h
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@ -193,7 +193,6 @@ DEFINE_EVENT(btrfs__inode, btrfs_inode_evict,
__print_flags(flag, "|", \
{ (1 << EXTENT_FLAG_PINNED), "PINNED" },\
{ (1 << EXTENT_FLAG_COMPRESSED), "COMPRESSED" },\
{ (1 << EXTENT_FLAG_VACANCY), "VACANCY" },\
{ (1 << EXTENT_FLAG_PREALLOC), "PREALLOC" },\
{ (1 << EXTENT_FLAG_LOGGING), "LOGGING" },\
{ (1 << EXTENT_FLAG_FILLING), "FILLING" },\