btrfs: add helpers to get fs_info from page/folio pointers

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Add convenience helpers to get a fs_info from a page or folio pointer
instead of open coding the chain or using btrfs_sb() that in some cases
does one more pointer hop.  This is implemented as a macro (still with
type checking) so we don't need full definitions of struct page, folio,
btrfs_root and btrfs_fs_info. The latter can't be static inlines as this
would create loop between ctree.h <-> fs.h, or the headers would have to
be restructured.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

...

This commit is contained in:

David Sterba 2023-09-14 16:24:43 +02:00

parent c8293894af

commit b33d2e535f

6 changed files with 15 additions and 12 deletions

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2

fs/btrfs/compression.c

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2

fs/btrfs/disk-io.c

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16

fs/btrfs/extent_io.c

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3

fs/btrfs/fs.h

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2

fs/btrfs/inode.c

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2

fs/btrfs/lzo.c

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